TCM2910A

TCM4910 TI | Alldatasheet

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+YPES TCM2910A, TCM4110, TCM4910 PCM y-LAW COMPANDING CODECS 02664, JUNE 1982 . @ TCM2910A is Designed to Be . T-7§-11-05 _ Interchangeable With Intel 2910A _ . N AND JW (600-MIL) @ TCM4110 and TCM4910 Offer Improved DUAL-IN-LINE PACKAGES Half-Channel Gain Tracking Error (TOP VIEW) Max Half-Channel Gain Tracking Error for P} = —60 dBm0 to -37 dBmO capxi(]t UO) 24D crx _ TCM2910A TCM4910 TCM4110 _ capxa [2 23{ Joc +0.9dB £07dB +£0.54B ante in []3 221 | Ves © Compatible with CCITT Recommendations AUTO ZERO | _}4 21} |sicx G.711 and G.712 : ano ono []5 2o[ | Fsx . @ -255-law Encoding and 8th-bit Signaling _ iGR | Ie 19} | CLKX . Compatible with AT&T D-type Channel : s a LU - Banks . . . Vop L|7 18] [FSR @ TTL-Compatible Digital Inputs and Outputs pcm in [ [8 17] |CLKR @ Optional Programmable Time Slot Selection pon [ |9 16] | Voc . @ Low Operating Power Consumption: ANLG OuT [_]10 15] ] TSX Power-down mode ... 33 mW Typical . ne [jit 14[_}Pem our @ +65% Power Supplies: +12V, +5V, -5V . ne []12 13| ]DGTL GND @ High-Reliability, Advanced N-Channel MOS . - Technology NC =No internal connection @ Low External Component Count -:--- -- © PEP Processing Available . y Caution. These devices have limited built-in gate protection. The leads should be shorted together or the device k dy. AN placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.

description

These circuits are single-chip pulse-code-modulated encoders/decoders (PCM CODECS) that provide all the functions | required to interface a full duplex (4-wire) voice telephone circuit with 2 time-division-multiplexed (TDM) system. In- : tegrated into the CODECs are circuits for signaling interface, PCM time-slot control logic, analog-to-digital (A/D) con- version, and digital-to-analog (D/A) conversion. Primary applications of the devices include: © Line interface for digital transmission and switching of T1 Carrier, PABX, and Central Office telephone systems. . @ Subscriber line concentrators CCRICTRAL OFFICE OR PARK SaTTOHING SYETEM @ Digital encryption systems - @ Digital voice-band data storage systems (HOOK smrcu DETECT @ Digital signal processing [fT . . ronan : Sed Tonaine. . : Tow aat0 : in CONTROL rem 5 waHWaY } ee x Copyright © 1982 by Texas instruments incorporated .

3 TEXAS INSTRUMENTS 4

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TYPES TCM2910A, TCM4110, TCM4910 PCM y-LAW COMPANDING CODECS - a “8961724 TEXAS INSTR CLIN/INTFC) “““66c 33952. 0 _ satel YN T-75-11-05 functional description te Smee ee eee - These devices are designed to perform the transmit {encoding or A/D conversion) and receive (decoding =~ ) or D/A conversion) functions in a pulse-code-modulated system. The functions of the CODEC are control, transmit, and receive. The control section is comprised of a precision voltage reference, a digital-to-analog converter, @ multiplexer, and a control register. The voltage reference supplies the D/A-converter resistor ladder network with an accurate, stable reference. The anslog output, in turn, is used to determine the A/D output as well as the D/A output. The control register multiplexes incoming receive and outgoing transmit data into the D/A converter. The control section also enhances the basic CODEC function with programmable time slot allocation and power-down circuits. These circuits allow dynamic allocation of both receive and transmit time slots. In small systems this feature could significantly reduce per-channel hardware for the first level of switching. - {n larger systems the time slot selection circuits can be disabled, and time slot allocation can be performed ‘at a common system location. With either system design, these CODECs can be powered down during periods of inactivity, thereby significantly reducing average system power consumption. ; . functional block diagram |": ~~ ees ete ee . : fe a oo vee Lo : _ fa) 116) ; TRANSMIT SECTION A/D siax—ve!2 ee ro zEn0 D ters EE tr = AUTO ZERO -{— sage SUCCESSIVE APPROXIMATION = aa ron Our ) CAPXT HO! Ri . . . GoNTROL SECTION a . 123) ge : bys i ~ eceveescrion oa | a (eo . PCM IN soy - pis CLKR HOLD Pts ese ANLG, 101) <I ° ouT SIGR: is ca) 113) 422) “ ANLG ND OND Veo fe) EE es2

2 Texas INSTRUMENTS :

INCORPORATED . POST OFFICE BOX 226012 # DALLAS. TEXAS 76265

. TYPES TCM2910A, TCM4110, TCM4910 PCM y-LAW COMPANDING CODECS ~~""6961724 TEXAS INSTR (LIN/INTFC) 55C 33953 OO parent Pin Functional Description T-75-11-05 [Pin[ Nome Betcription [1 | CAPR? | Connection forthe warsmft holding (analog sampling) capeciton Sd [2 | cAPK2 | Comaction forte wanenit oidng analog sarping)epecter dC PN [Seaman mentor frame synchronization pulse, FSX, and the sample value Is held in the extemal capacitors connected at the CAPX1 ond CAPX2 pins. ‘This output is the same ss the most significant bit of the encoded PCM word (+5 V for negative, - 8 V for Se Be aia P= aia [S| ANG GND | Anaog run common tothe Wonar and receive analog cela Not conected t OTL GND tral between two signaling frames. TTL-compstible. : : : [7 [Woo | Sunni vatage (12 V 26%) efrencod wo aneboa wom CS | [PN [Seton Pon ch sade cone cr wresvecmeiegiee | q the time defined by FSR, CLKR, and the contents of the receive control register, | (EI aeeacne ; capable of sinking one TTL losd (1.6 mAb. OT Snieanwansoe rman | held constant between two conversions. [11 [NC ___| No internal connection. It is recommended that this pin be connected to ANLG GND. ; [12| NC ___| No internal connection. It is recommended that this pin be connected to ANLG GND. [13 [oct GND | Ground rum common tote loge power suppl, Veg. id [enor | Sete cossapne, Tse ote cont gee na taa : and the control register. TTL three-state output capable of driving two TTL loads (4 mA}. : ey | Normally high, the transmit time-slot output goes low while the CODEC is transmitting » PCM word on PCM OUT. : Timo stot information is used for diagnostic purposes and also to gate the data on the PCM OUT pin to the PCM : transmit highway. The open-drain output is capable of sinking two TTL loads (3.2 mA}. [76 | Wee | Senpivvolage (5 V + BEI elernced to dgtalground. | P7[O [semnmmswi ss mpon pens 0% anyone Themen | 7 The maximum rate is 2.1 megabits per second at 50% duty cycle. TTL-compatible. OTT ty section. Maximum frame synchronization repetition rate is 12 kHz. Also used to differentiate between non- { signaling frames and signaling frames for the receive side. TTL-compatible. a a raed ond for 2 T1 carrier system. Maximum rete Is 2.1 megabits per sacond at 60% duty cycle. TTL-compatible. Yn section. Maximum repetition rate is 12 kHz. Also used to differentiate between non-signaling frames and signal- ing frames on the tranemit section, TTL-compatible. Gl eal =>" frames. TTL-compatible. _ [Be [ eee] sunor vonaoe 5 v 2 Sil eleencns@ AMGGND SS SCSC—~Sd [25 [Oc | Date input wo program the CODEC Tor ether the avect or microcomputer mode of operation. TTkeonpetbie._ | PMS [Sennves sctarmnamecnawnes Teewee nn | connected to Veg, DC becomes an active-low chip select. TTL-compatibie. ‘ SS i TEXAS INSTRUMENTS 3 : ; INCORPORATED : > POST OF FICE BOX 228012 © DALLAS, TEXAS 75265 . a .

~~ TYPES TCM2910A, TCM4110, TCM4910 “ ye75-11-05 > PCM y-LAW COMPANDING CODECS operation eee so ~ ‘These CODECs are capable of operating as transmitters and receivers in any of the 64 channels of a PCM system. The receive and transmit sections can be assigned to the same channel (time slot) or to different channels, and assignments can be changed under microcomputer control to meet changing system H needs. Table 1 shows the control options. ; . TABLE 1 . OPERATION CONTROL CONFIGURATIONS : CONTROL TION . SIGNALS® - : ce OPERA' : las e | bt x] Undated operation Pree Powerdown or standby opeatorarsatae eg 1 [orectone opetin, Reosve and vanent nie ittine wt WMicrocomputer-control operation. Clock in one of & bits of the control word ‘at the DC input. Bits 1end2.. {See Figure 3) : . 7 oo ° ° Load bits 3 through 8 into transmit and receive time-stot counters. . 0 1 Load bits 3 through 8 into transmit counter only. - - 1° 0 -~> Load bits 3 through 8 into receive counter only, - ; 1 1 Power down (Bits 3 through 8 are irrelevant). . . Bits 3 through 8 for time slot assignments 1 through 64, The time slot numbers ‘equal one more then the decimal equivalent represented by bits 3 (MSB) through 8 (LSB) using positive logic. . slot BZ Bits Bits BtG Bit7 BEB 200 9 9 Oo Od, - 6 [) o .0 rs : . Por er nr re ° . 6 4 1 woot 1 1 *H = high fevel, L = low level, see digitet interface table. 2. Km retevent, = Veg-totow transition, we TS . . In microcomputer control operation, the control word at DC is divided into a mode section (bits 1 and 2) and a time slot assignment (bits 3 through 8}. In mode 00 both the receive and transmit time slot counters are addressed, and they both receive the same subsequent 6-bit time slot assignment. In mode 01 the transmit time slot counter is addressed for time slot assignment. Mode 10 assigns a time slot only for the receive section. Mode 11 puts the device in the standby operational status and ignores the remaining 6 bits of the control word. Specific functional considerations for microcomputer-contro! operation are: @ All 8 negative-going transitions of CLKC must occur within 125 microseconds for the frame rate of 8 kilobits per second. The first transition of CLKC may occur anywhere within a frame. The CLKC pin should be at a TTL low level after time slot assignment is completed. @ A dead period of 250 microseconds (2 frames) must be observed between the first positive transi- : tion of CLKC in a time slot assignment and that of any subsequent time slot assignment. © It is recommended that either mode OO or mode 01 be transmitted to the control register during ° power-up or system initialization to ensure that a valid time slot is always transmitted. ; © The receive or the transmit section of the CODEC will operate only after both sections have been i . assigned a time slot. Therefore, transmit-only and receive-only time slot allocation is not allowed. : @ Clocking the control register while the CODEC is active may cause an increase in idle-channel noise. H 4 TExAS INSTRUMENTS

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TYPES TCM2910A, TCM4110, TCM4910 PCM y-LAW COMPANDING CODECS T-75-11-05 Direct-control operation is implemented by connecting the CLKC pin to +5 volts (V¢c) and using the DC pin as the chip select pin. When the DC pin is held low, the device transmits in the channel foliowing FSX ‘and receives in the channel following FSR. On the other hand, when the DC pin is held high, the device is in the power-down state. Operational considerations for direct time slot allocation are: @ Atleast two framing pulses must occur after DC goes low to ensure that the CODEC is in direct- * contro! status. @ Three frames (375 microseconds) are required to enter direct operation after power supply re- quirements are met and all clocks are available. @ After DC is brought high, two framing pulses are required to put the CODEC into the standby mode. @ The TCM2910A can replace a 2910 CODEC even though the CLKC characteristics are not the same ; for the two devices. encoding mode . , ; The analog input signal sampled at the ANLG IN pin Is held by an external capacitor on pins CAPX1 and . CAPX2. This sampling is done synchronously with the transmit time slot assigned to the device. The : “ eight-bit digital PCM word will be transmitted on the PCM OUT pin in the frame immediately following the frame in which the analog signal was sampled. See Table 3. : . > : - decoding mode . . . When the assigned receive time slot occurs, the eight-bit digital PCM word is fetched from the PCM highway on the PCM IN pin. The word is converted from digital to analog and held with an internal capacitor until the next assigned receive time-slot update. See Table 3. signaling - ‘ . : These devices are compatible with per-channel signaling and are capable of differentiating between the : signaling and nonsignaling frames. A signaling frame is one in which the eighth bit of the PCM word con- tains signaling information while the seven most significant bits are normal information bits. The signaling c frame is designated by the framing pulse (FSX or FSR) whose length is extended to two full clock periods as shown in the timing diagrams. A framing pulse of 8 nonsignaling frame is one full clock period in . length. During a transmit signaling frame, the level present on the SIGX pin is substituted for the 8th bit of F the PCM word. During a receive signaling frame the value of the 8th bit of the PCM word of the receive ' channel will be put on the SIGR pin and the signal level will remain unchanged until it is updated by the i next signaling frame. The remaining 7 bits will be decoded according to the procedure in CCITT Recom- { mendation G.733. See Figure 1 and Figure 2 for transmit and receive timing diagrams. . framing These devices are compatible with the D3/D4 framing format (T1 framing), which inserts a 193rd bit after the 24th serial channel (8 bits per channel) frame. The extra bit raises the clock frequency (CLKX and CLKR) from 1.536 MHz to 1.544 MHz. | . standby operation . . The CODEC provides for powering down to standby status from both microcomputer-control and direct- control operation. The power consumption is reduced from 230 mW to 33 mW, Standby operation results in the powering down of all the CODEC functions except the DC, CLKC, SIGX, SIGR, and PDN in- puts. Also, PCM OUT is forced into a high-impedance state thus helping to ensure that the PCM bus will not be driven. The SIGR output is held low to provide a known condition until changed by a signaling frame after reactivation. In microcomputer-control operation, the power-down state is invoked by clocking in 11 at the DC input as . described in Table 1. In direct operation the power-down state is called by taking the DC pin high and con- : necting clock CLKC pin to Vcc. Recovery from the power-down condition is accomplished by forcing DC . to the low level and allowing at least 2 frame synchronization pulses to occur. é a z TEXAS INSTRUMENTS 5 : INCORPORATED : : POST OFFICE BOX 220012 © DALLAS, TEXAS 75265 2 _— - ee —

—_ TEXAS INSTR {LIN/INTFC} SS DEM 8961724 003395 0 | _— TYPES TCM2910A, TCM4110, TCM4910 : _ T-75-11-05 PCM u-LAW COMPANDING CODECS } TUE UU IEIEIIIIIIEISIE EES! internal reset . . . : > These devices are designed to aid the designer in the elimination of certain system power-interruption pro- ~. blems. Three of the most common of these problems are: (1) Plugging a card into a ‘‘hot’’ system thus causing spikes on the common power supplies (2) Various transients such as caused by duplicated power supply faults or power feeder faults (3) Transients and spikes that result from turning the power supplies on. These devices are tolerant of transients in the negative power supply (Vgg) provided that Vgp remains more negative than —3.5 volts. The device will go into the power-down (standby) status if, during power up (single-card or system), Vcc or Vpp is supplied after Vgp or if a transient causes the positive power supplies to drop below approximately 2 volts. Since TSX is inhibited in standby operation, any CODEC in this status can be detected easily. . companding The amplitude distribution of a speech message is not uniform. Moreover, the probability of occurrence for a small amplitude is greater than the probability for large amplitudes. Advantage can be taken of this fact by “compressing” digital resolution into the lower signal amplitude during transmission and “expanding’’ the signal upon the reception, thus increasing the overall signal-to-noise ratio. The Bell system has defined this function and entitled it the p-law. : In 1 + pfx] : In (1 +p) where p = 255, x is the normalized input, and sgn(x) is the sign of x. A continuous implementation of f(x) would be impossible, therefore a piecewise continuous approximation of f(x) is used. The approxima- tion divides the function into 16 segments, and each segment is divided into 16 equal intervals except for the first interval of the first segment. Refer to CCITT Recommendation G.711 for the segment and inter- val implementation details of the y-law used for these circuits. ‘ absolute maximum ratings . Temperature under bias 2.2... cece eee eee eee teeter teense ees = 10°C to 80°C NOTE: Stresses in excess of absolute maximum ratings may pérmanentiy damage the device. Functional operation outside the recommended operating condi- tions is not guaranteed. Prolonged exposure to absolute maximum ratings may have an adverse effect on device characteristics. recommended operating conditions a [ Grounds ANLG GND and DGTLGNO) SSCS OT [Auto-zero resistor, Rt (eee Figures 4 and6)_——S i | | [Auto-zororecistor, Ra (eee Figures # end) SSS SO | [Auto-zero resistor, R3 (s00 Figures 4 and6) SSCS OY [ Analog coupling capacitor, C1 (see Figures@and5) | | [anoiogcoupingcepector C2 tee Figue 6) || [Analog sampling capacitor, CAPX, for 6-H sampling rat (see Figures @end 6) | 1600 2600 2400 | oF | NOTE 1: Voltages at the analog input, analog output, and Vp terminals are with respect to the analog ground terminal. All other voltages are referenced to . the digital ground terminal unless otherwise noted. : a : . . 682 i 6 TEXAS INSTRUMENTS . : INCORPORATED : POST OFFICE BOX 225012 © DALLAS, TEXAS 75265, nS Sn ST EN SS ENE

7 TEXAS INSTR {LIN/INTFC} 55 DE 8963724 0033957 ae D _

‘ ~ TYPES TCM2910A, TCM4110, TCM4910 PCM y-LAW COMPANDING CODECS a T-75-11-05 a a electrical characteristics over recommended ranges of operating free-air temperature and \\ supply voltages (unless otherwise noted) - : digital interface PARAMETER TEST CONDITIONS [Vx High-ovel input vokage—SSSCSC“‘C~C‘“~;« dC CU TCC~SYSCC*d [Wy Low-level nput vottags SP Cr Lv yy High-level input current Pwyasevy 0 Tn . I Low-level input current [Vs ov to | High-lovel output voltage [ PCM OUT [lon=1smA | aed Vou v (see Note 2) [sick toy = 80 uA Voy. Low-level output voltage [sich ty = 0.5 ma vf. [PON ig maa [sx tg = 2mA analog interface . 7s * a . o PARAMETER TEST CONDITIONS MIN TYP* MAX | UNIT ‘Analog-input impedance (between ANLG IN and CAPX1) in series with CAPX to ANLG GND | y= -3.1Vt03.1V 125 300 = 600 during sampling of ANLG IN ~ — : : Small-signal impedance at ANLG OUT Vo = ~3.1Vto3.1V yoo 180 300 | 2 | Serial 11111111 z Serial 11111111 ( Encoder input offset voltage (see Note 3) Sova nt - Peak negative output voltage at auto zerot 400 2 to ANLG GND Y : power supplies . . ee . . os PARAMETER TEST CONDITIONS Vpp = 12.6, Veo = 6:25V, 9 [a 28 [mA] : Ves = -4.75v, [116 [ma feux = 2.048 MHz, [18a [ma See Note 4 [4 tLimits are expressed as magnitudes. For exemple, if Vgg = —5 V, the typical value is — 5 V and the minimum value is ~3 V. . * Typical values are for T, = 25°C and nominal power supply voltages NOTES: 2. PDN and TSX outputs are open-drain transistors that only sink current to DGTL GND. External pull-up devices are required to source current. 3. External auto-zero must be used when the required input offset is less than + 4 code steps or approximately 2.7 mV. The external auto-zero circuit shown in Figure 5 will bias the CODEC at the zero-crossing point and reduce the input offset voltage to zero. . 4. These measurements apply to the microcomputer and direct modes. Alll output pins are left open. The DC input (pin 23) is at 5 V for standby cur- rent and at 0 V for operating current. All other input pins are grounded with the clocks operating. . a 682 ‘ : TEXAS INSTRUMENTS 7 . INCORPORATED . POS™ OFFICE BOX 225012 ® DALLAS, TEXAS 75265 rene A a aE tc an

oe TEXAS INSTR {LIN/INTFC} SS pe 69b1724 0033958 3 | = : TYPES TCM2910A, TCM4110, TCM4910 ~~ 7.75-11-05 > : PCM y-LAW COMPANDING CODECS : operating characteristics over recommended ranges of operating free-air temperature and ~) supply voltages and RL = 600 © (unless otherwise noted).~ . i gain and dynamic range PARAMETER TEST CONDITIONS [win Tes wax | _UNIT] " — Nominal supply voltages, Ta = 25°C, | om | Digital milliwatt response 3 See Note & and Figure 8 5.63 5.63 6.73 Temperature coefficient of Nominal supply voltages, —0.001 -0.002 dB/°C digital milliwatt response See Note 5 i 7 ___. | Supply voltages changing + 5%, | | i Change in digital milliwatt response : i Ta = 25°C, See Note 5 #0.07 H RMS input dynamic voltage ‘Nominal supply voltages, i 2.17 . . } range using de and ac tests. Ta = 25°C, See Note 6 and Figure 8 2.20 2.28 v ' Temperature coefficient of. - Nominal supply voltages, -.. = - { RMS input dynamic voltage range . See Note 6 j ‘Change in RMS input dynamic voltage range Supply voltages changing + 5%, mv : Ta = 25°C, See Note 6 j RMS output dynamic voltage range Nominal supply voltages, Ta = 26°C | 2.13 2.16 2.19 i Temperature coefficient of RMS Si vie i output dynamic voltage range Nominal supply voltages mviec ; Change in RMS output dynamic voltage range Supply voltages changing +5%, . mv Ta = 25°C Sell-loop gain Pi = 0 dBm 0 at 1.02 kHz, P 9 See Note 7 and Figure 7 “Typical values are at Ta = 25°C, Vpp = 12V, Vcc = 5V.Vap=-5V- - - Bee - “ NOTES: 5. The input to PCM IN is 8 repetitive digital word sequence specified in CCITT Recommendation G.711. Measurement is made at ANLG OUT. \\ . Limits are not corrected for (sin x)/x degradation and no C-message-weighted filter is used. See Table 2 on Page 15. ~ 6. In the de procedure, the positive and negative clipping levels are measured and dynamic voltage range is calculated. In the ac procedure, @ sinusoidal input signal to ANLG IN is used and input dynamic voltage range is measured directly. 7. The CODEC acts as both encoder and decoder (PCM OUT = PCM IN) in a digital loop-back configuration. Specified gain Is in addition to normal 8. In the torm (sin x)/x _O . . . Loe = q measurement frequency . x 7 ‘sampling frequency EET UE USES el : 682 : 8 TEXAS INSTRUMENTS . INCORPORATED " POST OFFICE BOX 226012 © DALLAS, TEXAS 75265

{6961724 TEXAS INSTR CLIN/INTFO) 55C 33959 D - TYPES TCM2910A, TCM411U, TUM4910 PCM -LAW COMPANDING CODECS (> 4275-11-05 C gain tracking error at f = 1.02kHz* a woe ad ~ MOST MOST «track; End-to-end gain tracking | au error (see Figure 6) : [P= =37dBmotoo demo | 0.3 03 7 a TCM2910A . Halfchennel gain wrecking | [ Pp= 85 dBmOto —50dBmO | 16 8 | error (encoder only [remo [i= seomna-oraea [as "| | : - | Teomat10 7 with ideal decoder) . Seofgues [P= =85dBmOto—60dBmO | 1.2 1.2 | ; - - ToM4910 : [ Pj= =65 dBmOto-50dBmo | 1.21.2 | i ne - | Tom2s10a : Half-ohannel gain tracking [ Py= = 55 dBmOto-50dBmo | 15 18 error (decoder only ~ [rewero [ftzceoammw-orama [sae ———"sa] | ith i Tom4110 | P,= -80 dimOte-37dBmo | 08 | with ideal encoder} - - ----| - See Figure 8 - [P= =65 dBmOto-s0dBmO | 4.28.2 | Tom4910 : [Pl= =58dBmOte 50 dBmo =n? 2] transmission characteristics (see Figure 8), f = 1.02 kHz (unless otherwise noted) : [ Signalto-totel-distortion ratio, C-Message weighting, End-to-end | See Figures || [ Signal-to-totat-distortion ratio, C-message weighting (half-channel | See Figures aa] | [tans ee Memetaewancomnseme Tee «| | . See Figure 8. Encoder idle-channe! noise measured at mid-tread See Figure 4 dBrncO (no quantizing noise) C-message weighting with no signaling with external auto zero : [serge | 8 | C-message weighting, no signaling Encoder idle-channel noise measured at mid-tread a aren : See Figure 4 (no quantizing noise), C-message weighting, . . . “with external auto Zero dBrncO quiet code (serial 11111111 to PCM IN) quiet code {serial 11111111 to PCM IN) NN . 2 682 : : TEXAS INSTRUMENTS 9 © INCORPORATED . ee 225012 @ DALLAS, TEXAS 75265. TEMAS INSTR CLIN/INTFC? 5S DEM asui7eu 0033959 5

— TEXAS ‘INSTR {LIN/INTFC} 55 ve 8961724 0033960 1 I ee TYPES TCM2910A, TCM4110, TCM4910 PCM y-LAW COMPANDING CODECS | seg a a woo wom = 22 nee wee ! ' 61724 TEXAS INSTR CLIN/INTFC) 55C 33960 i2) TN clock timing requirements over recommended ranges of operating conditions (see note 10) T-75-11-05 PARAMETER [win wom maxTunit__| ") TeICLK Clock period for CLKX, CLKR(2.048-MHz systems) | ty ty Rise and fall times for CLKX, CLKR, and CLKC [5 30f ns twiCLK. Clock pulse duration for CLKX, CLKR, and CLKC eS Clock duty cycle [twiCLKy/to(CLK)! for CLKX and CLKR [4 — ss] %» *«| transmit timing requirements over recommended ranges of operating conditions (see note 10) CS a an ‘Analog input conversion time referenced to time conv(X) leading edge of transmit time slot,(see Note 9) slots || Kazaa Fame smedetaytine Ow TeulSIGX) Setup time before Bit 7 falling edge : | iste — atime after 68 faling edge | Os receive timing requirements over recommended ranges of operating conditions (see note 10) - - PARAMETER MIN NOM MAX|UNIT | t ‘Analog output update from leading. =. 7416 time ‘conviR) edge of the channel time slot . slots 20 to [ns | ‘ {ESL Racal dete aut tine i ee in celve data hold time os control (microcomputer operation) timing requirements over recommended ranges of operating conditions . a, OCC Taupo Control dete sotuptme Cts th Control date hold time [100s propagation delay times over recommended ranges of operating conditions (see note 10 . and timing diagrams) From rising edge of transmit clock Bit 1 tpat to Bit 1 data valid at PCM OUT Cy = Oto 100 pF 50 180 (data enable time on time slot entry) - - From falling edge of transmit clock Bit n tpa2 to Bit n+1 data valid at PCM OUT CL = 0 to 100 pF 80 230 (data valid time) ~ From falling edge of transmit clock Bit 8 > - | tpag. to Bit 8 Hi-Z at PCM OUT CL = 0, See Note 10 75 245 (data float time on time slot exit) From rising edge of transmit clock Bit 1 — = 0 to 100 pF ted to TSX active (low) (time slot enable time) CL = 0 10 1000 mn = 0, See Not 70 22! feds to TSX inactive (high) (time slot disable time) CL = 0, See Note 10 5 | | From falling edge of receive clock Bit 8 t on signaling frames to updated pdb signaling bit on SIGR output {receive signaling update time) NOTES: 9, The 20-time-slot minimum ensures that the complete ‘AID conversion will take place under any combination of receive interrupt or asyn- chronous operation of the CODEC. ff only the transmit channel is operated, the A/D conversion can be completed in a minimum of 11 time slots. é ) - 10. All timing parameters are referenced to 2 V except tpd3 and pgs, which reference a high-impedance state. x EEE . 682

40 TEXAS INSTRUMENTS

‘ POST OFFICE BOX 225012 © DALLAS, TEXAS 75265 TET

eee - ~ ce TEXAS INSTR {LIN/INTFC} 5S vel 8961724 OO33%be 5 I TYPES TCM2910A, TCM4110, TCM4910 PCM y-LAW COMPANDING CODECS B96 172 S“INSTR CLIN/INTFC) 55C 33962 0 —_- —__. SL —— ‘ T-75-11-05 power supply rejection and crosstalk attenuation _ - . . ») : TEST CONDITIONS [ Min type max] unr | SVRR1_Vpp supply voltage rejection ratio Decoder alone, See Note 11 [45 55 | «Bb | SVRR2_Vgg supply voltage rejection ratio Decoder alone, See Note 11 [35 38Sti‘(‘i(lSCéSC;] SCY SVRR3_ Voc supply voltage rejection ratio Decoder alone, See Note 11 [| 50 so | « | SVAR4 _Vpp supply voltage rejection ratio 50 76 [8 | SVAR5Vap supply voltage rejection ratio | Encoder lone | 4870] 8 | SVRR6_Ve¢ supply voltage rejection ratio [Encoder lone | BO 8B TB SVRR7_Vpp supply voltage rejection ratio Self loop, See Note 12 40 50 a . : SVRR8 Vag supply voltage rejection ratio Self loop, See Note 12 [35 38ti“( er CY SVRRO_Voc supply voltage rejection ratio Self loop, SeeNote12__| 50.80. ~~ ~*+(| ~~ R See Figure 10, See Note 13 | 75 _>80_ | a8 | * Typical values are for Ta = 25°C and nominal power supply voltages. _ NOTES: 11. With the test device acting as a decoder, a 200 mV peak-to-peak, 1.02-kHz signal is applied to the appropriate supply pin and measurements are made at the remote encoder output with the decoder in idle-channel conditions. . 12. With the test device acting as encoder and decoder, a 200 mV peak-to-peak, 1.02-kHz signal is applied to the appropriate supply pin and Set mn measurements are made at the decoder output with the encoder in idle-channel conditions, . 13. The analog input power is 0 dBmO at 1.02 kHz and the decoder is under idle-channel conditions. Measurement is made at ANLG OUT. eee TYPICAL APPLICATION INFORMATION FILTER : id ° CODEC pee 4 Faieedientaniastesinadaatientntiadaateeatienttatienteetertetia 1 if 1 - 1 4 ct 17 - | | Vo3sue -. | Sm ey : ' | ENCODER | | ANLG IN CAPX1 | FILTER f] 1 - | 1-4 [es > | capx | 1 150 k2 I! I 2000 pF 1 oo CAPX2 | oe I Sjautozeno of Td | ao we Loma owt. “ss 7 ~s . i} | | antcenp | = + I ! 1 1 D : amv vt | | pecover | -~1 - ~. OFFSET I FILTER fo. 8 jANLG OUT I I | I Pom ANLG GND ! . | ene a a a ne FIGURE 4 — ANALOG INTERFACE WITHOUT EXTERNAL AUTO ZERO See 682

12 TExAS INSTRUMENTS

POST OFFICE BOX 225012 @ DALLAS, TEXAS 75265

i TEXAS INSTR {LIN/INTFC} 55 DE 8461724 0033943 7 | ae ‘ TYPES TCM2910A, TCM4110, TCM4910 : , . PCM y-LAW COMPANDING CODECS (7 -9R-11.9R el T-75-11-05 ( . TYPICAL APPLICATION INFORMATION | rs | | as | ! c2 ! | | | 0.3 nF ! ! ! | encover |! Vangin carxi | \\ FILTER i: - ! Hl lm R3 i. ! capx : 1 lis0Ka2$ 470K0 1 fs - | 2000 pF I | AUTO ZERO wo oe | caPx2 | ! ! ne ! J 1 i 13300 ! | H | | ; | | ! ad | ! | ANLG GND | p 2mVv | | DECODER - OFFSET | H FILTER H | ‘ANLG OUT l | | on lone ANLG GND i | a | Lou FIGURE 5 — ANALOG INTERFACE WITH EXTERNAL AUTO ZERO ee ———— ° . PARAMETER MEASUREMENT INFORMATION ANALOG] _ —— 3 ANLG Pc ANLG PCM s Abney 5530 IN out IN ouT (or equivalent) CODEC CODEC ANALOG LEVEL METER PCM ANLG PCM ANLG Wa G PLM-96 iN our 'N out (or equivalent) . . _. FIGURE 6 — END-TO-END GAIN TEST CIRCUIT ANALOG Aahoe ANLG pcm F ADRET 2230 IN our : { {or equivalent) CODEC | | ANALOG . LEVEL METER PCM ANLG| } ~ i " = ° - FIGURE 7 — SELF-LOOP GAIN TEST CIRCUIT ( a W & G: WANDEL AND GOLTERMANN Ed 682 TEXAS INSTRUMENTS B INCORPORATED POST OFFICE BOX 225012 © DALLAS, TEXAS 75265

. _ ne a _™“S TEXAS INSTR {LIN/INTFC} SS Def 8961724 OO339bY 4 FF TYPES TCM2910A, TCM4110, TCM4910 T-75-11-05 PCM p-LAW COMPANDING CODECS . a : PARAMETER MEASUREMENT INFORMATION > i IDEAL DECODER ANALOG SOURCE ANLG PcM| W&G ENCODER = LEVEL LEVEL METER 7 ADRET 2230 IN OUT PCD-64 W&GPLM.95 (or equivalent) . (or equivalent) {or equivalent) ; . coDEC s1 ~——" 82 DIGITAL DATA| NOISE LEVEL \\ ; GENERATOR PCM ANLG w METER 1 W&GPCG-1 IN OUT . 7 F " (or equivalent) ~ DECODER NOISE {or equivalent) . FIGURE 8—TRANSMISSION PARAMETER TEST CIRCUIT < ° W & G: WANDEL AND GOLTERMANN . “ 8 30} : pba | ET | - |, = 1,222 E 5 20 ia ao 2 seeeeeeeee TCM2910A, TCM4110, TCM4910 TYPICAL, HALF-CHANNEL 15, © === TCM2910A, TCM4110, TCM4910 MINIMUM, END-TO-END i —— MINIMUM END-TO-END, AT&T D3 CHANNEL BANK 2 10 COMPATIBILITY SPECIFICATION (ISSUE 3, 10-77) 8 a ; 0 Ft | tt i 45-40-35 -300 25 —=20—— 1510 5 0 : INPUT LEVEL —dBm0 FIGURE 9 — SIGNAL-TO-TOTAL-DISTORTION RATIO : 2) ; ; ; i 682

4 TEXAS INSTRUMENTS :

POST OFFICE BOX 226012 # DALLAS, TEXAS 75265 .

: TEXAS INSTR {LIN/INTFC} SS DE 6961724 0033965 a I ~~ : TYPES TCM2910A, TCM4110, TCM4910 : PCM y-LAW COMPANDING CODECS . fe a ae NY T-75-11-05 ¢* eee : C . PARAMETER MEASUREMENT INFORMATION . : DIGITAL-TO-ANALOG TEST , IDEAL DECODER ANALOG ANLG PCM WaG LEVEL METER IN out PCD-64 W&G PLM.95 (or equivalent) (or equivalent) DIGITAL DATA} a cod CODEC GENERATOR im0 Code W&GPCG.1 [at 1020 He nM aNot {or equivalent) ANALOG-TO-DIGITAL TEST ANALOG . SOURCE 0.dBm0 Code | ANLG PcM - - ADRET 2230 ‘at 1020 Hz IN out : (or equivalent) . - copec ANALOG vOENERATOR | aL PCM ANLG| LEVEL METER W& GPCG-1 Code IN oUuT W&GPLM.95 (or equivalent) (or equivalent) ( a FIGURE 10 ~ CROSSTALK ATTENUATION TEST CIRCUIT ~ W & G: WANDEL AND GOLTERMANN . TABLE 2 u-LAW DIGITAL WORD SEQUENCE FOR THE DIGITAL MILLIWATT. RESPONSE PER CCITT RECOMMENDATION G.711 [1 fofoyotititi{i [ol i [2fo;oyvofo[ifoti {i} i p3fo}ofofofijotitr| S[4{opofo tyr {its fo | 3 fs{rfofto tat ititi fo | [eta yoyo fol ifoli {i . [7{ apoyo foyafola it) pes fevoyay tt] s {eo} : SS 682 TEXAS INSTRUMENTS 15 INCORPORATED POST OFFICE BOX 226012 @ DALLAS, TEXAS 75265

. TEXAS INSTR {LIN/INTFC} SS D 8961724 OO339bb 2 L TO . A (+ 9p-41=9R Y TYPES TCM2910A, TCM4110, TCM4910 T-75-11-05. PCM y-LAW COMPANDING CODECS , SS TABLE 3a — » - LAW, POSITIVE INPUT VALUES Reproduced from CCITT? (Volume lil — 2 on Line Transmission) . Recommendation G.711 on Pulse Code Modulation of Voice Frequencies . Number Value - Decisi Character signal Value Decoder of intervals | at segment | Decision ision (see Note 3) at decoder output X interval end value wave 1 output Yn value ize points numbern | (see Note pit number (coo Nowe’4) | number 12345678 rn ee 128) ss) J — . 10000000 8031 127 127 7903 H t \\ \\ 16 x 256 H - 4 (see Note 2) i ' ' i ub 4319 t ' 4063 112 4063 ! { 4 1 ! 7 16 x 128 H { t 1 ! t 1 of =| aad 1 1 2015 96 2015 ! ! . | ‘ i] H ' : 1 | | Gee Note 2) 1 | : rT 1 1 . 1 i] > 81 “1055 1 1 991 80 991 1 ! ‘ { ! 16 x 32 wet | - cool i 1 “) 1 t t ' 65 sul 1 1 479 64 479 ' ! 1 t T i ' 4 16 x 16 { Hl (see Note 2) H i t i ! 1 1 49 239 1 1 223 48 223 ! { H fl ' { 1 16x 8 H H (see Note 2) { 1 to.) H 1 1 t 33 103 1 1 y1011111 99 32 95 32 95 ! ' t ' 2 1 1 1 1 1 t t ' . 7 35 i 1 { ! 31 16 31 r ! 15x 2 ! ! (see Note 2) H | 1 t 1 i t i ! i ' 2 3 t 1 1 1 po | 0 0 0 0 NOTES: 1. 8159 normalized value units correspond to the value of the on-chip voltage reference. 2. The PCM word corresponding to positive input values between two successive decision values numbered n and n + 1 (see column 4) is (255 — n) expressed as a binary number. 3, The PCM word on the highways is the same as the one shown in column 6. 4. The voltage output on the ANLG OUT lead is equal to the normalized value given in the table, augmented by anoffset.The offset “~” value is approximately 15 mV. * 5. X42¢ is e virtual decision value. $ The International Telegraph and Telephone Consultative Committee. J Published by the International Telecommunication Union, Geneva, Switzerland. a 682

16 Texas INSTRUMENTS

~ INCORPORATED POST OFFICE BOX 225012 @ DALLAS, TEXAS 75265 cere tee ea EE PPP EE I TE eI =

! TEXAS INSTR {LIN/INTFC} 5S Def) 8961724 003347 4 i es ! TYPES TCM2910A, TCM4110, TCM4910 : PCM y-LAW COMPANDING CODECS T-75-11-05 : TABLE 3b—»- LAW, NEGATIVE INPUT VALUES . C Reproduced from CCITT? (Volume III — 2 on Line Transmission) Recommendation G.711 on Pulse Code Modulation of Voice Frequencies Number Value Decisi Deets (Character signal Value Decoder of intervals | at segment siue tue (see Note 3) at decoder output X interval end | voor 20 Ne ar output Yn value |. size points | numberm | (see Note 1) Bit number (see Note 4)| number 12345678 ~ 1 ' . 2 3 \\ ! - was s 1 ee a 1 ' ; * t = ! (see Note 2) - Hi 1 i ' H 1 ' ~ 231 1 fee -31 1 1 : 7 ~35 | 1 t t. H { ' ' 74 24 : - -95 32 95 arn ie ee | os - 2 33 _ =103 ! ! 1 1 t fou 4 H 16x B 1 . 1 (see Note 2) H t i) i ' i) 1 1 ~223 48 223 1 1 ( : : 49 239 1 ' ~- a 1 4 ! ! I { 16 x 16 7 4 ! (see Note 2) H t 1 ' ~ ag 68 - W479 t ' 65 -S11 ! ' 5 1 1 (see Note 2) H ! ' 1 i { i -991 80 ~991 1 1 81 1055 1 ! 1 ' 1 ' H 16 x 64 1 ! (see Note 2) H Hi i 1 1 1 1 2015 96 -2015 1 ' 97 2143 ' ! , 7 16 x 128 i ! (see Note 2) t ‘| 1 1 -4063 112 4063 ' ! oooor1tit -4191 112 { 113 4319 1 ' : 1 1 (see Note 2) Hi 1

16 X 256 126 -7647 1

00000000 ~8031 127 rs NOTES: 1. 8159 normalized value units correspond to the value of the on-chip voltage reference. 2. The PCM word corresponding to negative input values between two successive decision values numbered n and n + 1 (see column 4) is (255 — n) expressed as 8 binary number. . 3. The PCM word on the highways is the same as the one shown in column 6. : B 4, The voltage output on the ANLG OUT lead Is equal to the normalized value given in the table, augmented by an offset, The offset vaiue Is approximetely 15 mV. $ The International Telegraph and Telephone Consultative Committee, 5. X498 is a virtual decision value. Published by the International Telecommunication Union, Geneva, Switzerland. a ee Nelle Ai NSE OL Rtanians mianeisinslil 682 TEXAS INSTRUMENTS 7 INCORPORATED . POST OFFICE BOX 225012 @ DALLAS, TEXAS 75265 .

: TEXAS INSTR {LIN/INTFC} SS DEB 8961724 0033968 & ——EEEE TYPES TCM2910A, TCM4110, TCM4910 T-75-11-05 ; PCM y-LAW COMPANDING CODECS TYPICAL APPLICATION INFORMATION - 5 : ; ~ Codec Interface with TCM2912A Filter : ~ | _ JCAPXY cLKC} C | > sg gtsten t

7 TOM 29128 [“]carxe’ “eo ]

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18 Texas INSTRUMENTS

: Peraeseeaiias POST OFFICE BOX 226012 @ DALLAS, TEXAS 75265