TS7514

TS7514 STMICROELECTRONICS | Alldatasheet

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PROGRAMMABLE V.23 MODEM WITH DTMF November 1998 7514-01.EPS / 7514-02.EPS PIN CONNECTIONS AXTL WLO ATO RAO1 RAI1 RAI2 RAO2 RFO RDI AGND MOD/DTMF MC/BC RTS ENP DGND TxD PRD XTAL IN XTAL OUT DCD RxD ZCO DIP24 AGND RAO1 RAI1 RAI2 N/CXTAL OUT XTAL IN N/C PRD TxD DGND ENP N/C DCD RxD ZCO RDI RFO RAO2 RTS MC/BC N/C MOD/DTMF ATXL WLO ATO PLCC28 ORDER CODES Part Number Temperature Range Package TS7514CP 0 to 70 oC DIP24 TS7514CFN 0 to 70 oC PLCC28 7514-01.TBL .PROGRAMMABLE MODES : - Modem 75bps transmit, 1200bps receive - Modem 1200bps transmit, 75bps receive - DTMF dialing - Call status tone detection - Auxiliary analog transmit input - Analog test loopback .PROGRAMMABLE FUNCTIONS : - Transmission level - Hysteresis and detection level - Filters (reception and transmission) - Line monitoring and buzzer - DTMF frequencies .FIXED COMPROMISE LINE EQUALIZER .AUTOMATIC BIAS ADJUSTMENT .INTEGRATED DUPLEXER .STANDARD LOW COST CRYSTAL (3.579MHz) .TAX TONE REJECTION .POWER-UP INITIALIZATION OF REGISTERS .OPERATES FROM ±5V .CMOS

DESCRIPTION

The TS7514 is an FSK modem which can be programmed for asynchronous half-duplex voice- bandcommunications on a 2-wireline or full duplex on a 4-wire line. Its programming concept makes it the ideal component to design low-cost intelligent modems, featuring auto dialing and auto answer- ing. The TS7514 conforms to CCITT V.23 recom- mendation. The chip incorporates DTMF dialing, line monitoring, tone and dialing detection. DIP24 (Plastic Package) PLCC28 (Plastic Leaded Chip Carrier Package)

Name Pin Number Description DIP24 PLCC28 MOD/DMTF 1 1 MODEM or DMTF Operating Mode Selection. Also controls write operations to control registers (if MOD/DMTF = 0 and MC/BC = 0). MC/BC 2 3 Digital Control Input. In MODEM mode, it sets transmission mode to main or back channel. It also permits selection of dialing or control registers programming. RTS 3 4 Request to Send. When RTS = 0, the circuit sends an analog signal to the ATO output. The signal depends on the operating mode selected. When RTS = 1, the signal sent to ATO is suppressed after its first zero crossing. When MOD/DMTF = 0 and MC/BC = 0, the RTS pin acts as a clock for serial data loading into the input register. ENP 4 5 Serial Register Write Select Input. When ENP = 0, the serial register input is connected to TxD. When ENP = 1, the register input is connected to PRD. DGND 5 6 Digital Ground = 0V. All digital signals are referenced to this pin. TxD 6 7 Digital Input for Transmit or Control Data PRD 7 8 Digital Input for Control Data. Selected through ENP XtaIIN 8 10 Crystal Oscillator Input. Can be tied to an external clock generator. f QUARTZ = 3.579MHz. XtaIOUT 9 11 Crystal Oscillator Output DCD 10 13 Data Carrier Detect Output RxD 11 14 Digital Receive Data Output ZCO 12 15 Zero Crossing Rx Digital Output (ringing detection) RDI 13 16 Analog Output for the Receive Signal after Filtering or Analog Input for the Amplifier-limiter. RFO 14 17 Analog Receive Filter Output RAO2 15 18 A2 Amplifier Output RAI2 16 20 A2 Amplifier Inverting Input RAI1 17 21 A1 Amplifier Inverting Input RAO1 18 22 A1 Amplifier Output V- 19 23 Negative Supply Voltage : – 5V ±5% AGND 20 24 Analog Ground = 0 V. Reference Pin for Analog Signals V+ 21 25 Positive Supply Voltage : + 5V ±5% ATO 22 26 Analog Transmit Output WLO 23 27 Analog Output for Line Monitoring and Buzzer ATxI 24 28 Direct Analog Input Transmit Filter 7514-02.TBL TS7514

G RAO1 RAI2 RAO2 DUPLEXER V+ DGND V- AGND RDI RFO TS7514 7514-03.EPS Figure 1 :Simplified Block Diagram TS7514

The TS7514 circuit is an FSK modem for half-du- plex, voice-bandasynchronoustransmissions on a 2-wire line according to CCITT recommendation V.23 or full duplex on 4 wire-line. The circuit features DTMF dialing, call status tone detection and line monitoring in both dialing and automaticanswer modes. A signalling frequencyis available at the line monitoring output (buzzer). Ring detection is possible by using the signal de- tection function and bypassing the receive filter. The receive signal at ZCO output can be filtered in the associated microprocessor. The TRANSMIT channel (Tx) includes : - Two programmable frequency generators. - One switched capacitor filter (SCF) with low-pass or bandpass configuration and its associated propagation delay corrector. - One continuous time low-pass smoothing filter. - One attenuator,programmable from 0 to + 13dB by 1dB steps. - One programmable analog input. The RECEIVE channel (Rx) includes : - Two operational amplifiers for duplexer imple- mentation. - One continuous time low-pass anti-aliasing filter. - One programmable gain amplifier. - One linear compromise equalizer. - One switched capacitor band pass filter (can be set to either main or back channel). - One continuous time low pass smoothing filter. - One limiting amplifier. - One correlation demodulator. - One programmable level signal detector. The LINE MONITORING channel includes : - One buzzer. - One 3-channel multiplexer to select beetwen : - Transmit channel monitoring. - Receive channel monitoring. - Buzzer. - One programmable attenuator Internal Control Power-up Initialization The TS7514includespower-upinitializationof con- trol registers. This system sets the ATO transmis- sion output to an infinite attenuation position, leaving time for the microprocessor to set up the RPROG input on power up. Control registers are also initialized when V+ is lower than 3V or V- greater than -3V. Registers Writeaccessto theDTMFdata registerand to other control registers is achievedin serial mode through TxD input or PRD input. Addressing of these 4 bit registers is indirect. They are accessed through an 8 bit shift registeraddressedwhen MOD/DTMF = 0 and MC/BC = 0. Data sent to the TxD input is strobed on the RTS signal trailing edge. Serial data is sent to the TxD input, with Least Significant Bit (LSB) first. The 4 Most Significant Bits (MSB) contain the control register address while the 4 LSB contain associated data. Data transfer from the input register to the control register(addressed by the MSB’s)is started by the operating mode (MODEM or DTMF) selection (MOD/DTMF = 1 or MC/BC = 1). D0 D1 D2 D3 D4 D5 D6 D7 MOD/DTMF MC/BC RTS TxD or PRD Data Address Time RPROG RDTMF RATTE RWLO RPTF RHDL RPRX RPROG TxD or PRD RTS CLK Datas Addresses 8-BIT SHIFT REGISTER (Input Register) 4-Bit Control Register 7514-04.EPS Figure 2 :Internal Control Register TS7514

RDI RDO XTAL OUT XTAL IN V+ AGND DGND V- 5V 0V 0V -5V RWLO RATTE SERIAL INPUT REGISTER AND DATA CONTROL CARRIER LEVEL DETECTOR FSK DEMODULATOR TIME BASE MX MX Internal Clocks RxD ZCO Mode G ATT RC MX CORR SCF SCF G RC MX RAO2 RAI2 RAO1 RAI1 DCD Mode RPROG RHDL RPRX RPRF RDTMF Data Address MOD/ DTMF MC/BC RTS TxD PRD ENP FREQUENCY GENERATOR SCF CORR SCF MX RC Mode MX BUZZER ATT MX WLO ATO Analog Loop RPTF ATxL 4-bit Bus 7514-05.EPS Figure 3 :Detailed Block Diagram TS7514

The various operating modes are defined by MC/BC and MOD/DTMF inputs,and by the content of a control register RPROG. TheTS7514 includes 8 control registers. Accessto each control register is achieved through an auxil- liary 8-bit shift register (input register).The input of that shift register is connected either to TxD or PRD,dependinguponthe statusof theENPcontrol pin (ie when ENP = 0 and ENP = 1 respectively). Inboth cases,the RTS inputreceivesthe shiftclock and sequentialy transfer is controlled by setting simultaneously MOD/DTMF and MC/BC to 0. The previous internal status and data are memorized during loadingof the input registerso that transmis- sion continues properly. That feature allows the user to modify transmission level or linemonitoring selection during transmission. The transmit chan- nel operatingmode (Modem main or back channel, DTMF) can only be modified when RTS = 1. When RTS = 0, the ATO transmit output is enabled and the preselectedoperatingmode is activated.When RTS returns to 1, Modem or DTMF transmission is inhibited after the first zero crossing of the gener- ated signal. MOD/DTMF MC/BC Transmission (ATO) Reception(RxD, DCD) 1 1 MODEM, Main Channel MODEM, Back Channel 1 0 MODEM, Back Channel MODEM, Main Channel 0 1 DTMF DCD= Active Tone Detection (270 -500Hz) if RTS = 1 … DCD = 1 if RTS = 0 0 0 If RTS = 0 when that configuration occurs, transmission and reception are not modified. If RTS = 1 (no signal sent on the line), transmission is not modified and reception is set up to detect 2100Hz tone (note 1). Note 1 :The decision threshold of the demodulator output is shifted, so that RxD changes from 0 to 1 at 1950Hz instead of 1700Hz. MODEM TRANSMISSION FREQUENCIES Modulation Rate TxD CCITT R35 AND V.23 Recommendations (Hz) Frequency Generated with Xtal at 3.579MHz (Hz) Error (Hz) 75bps 1 390 ±2 450 ±2 390.09 450.45 +0.09 +0.45 1200bps 1 1300 ±10 2100 ±10 1299.76 2099.12 -0.24 -0.88 DTMF TRANSMISSION FREQUENCIES Specifications DTMF (Hz) Frequency Generated with Xtal at 3.579MHz (Hz) Dividing Ratio Error (%) 697 ±1.8% 770 ±1.8% 852 ±1.8% 941 ±1.8% 1209 ±1.8% 1336 ±1.8% 1477 ±1.8% 1633 ±1.8% 699.13 771.45 853.90 940.01 1209.31 1335.65 1479.15 1627.07 5120 4640 4192 3808 2960 2680 2420 2200 +0.31 +0.19 +0.22 -0.10 +0.03 -0.03 +0.15 +0.36 TS7514

• Output Level Detection conditions The DCD signal detector output is set to logic state 0 if the RMS value of the demodulatorinput signal is greater than N1. The DCD output has logic state 1 if the RMS value is less than N2. The detector has an hysteresis effect : N1 - N2. - Timing Detection Requirements Signal detection time constants at the DCD out- put comply with CCITT Recommendation V.23. Modulation Ratio DCD Transition CCITT V.23 (min) Min. Max. CCITT V.23 (max) Unit 1200bps t1 ms ms 75bps (Note 1) t1 ms ms Note 1 :wide band Rx filter used (see Figure 7c). LINE DCD Note : When delays are bypassed (see RPRX register programming) response time ranges from 0 to 5ms in receive mode at 1200bps, and from 0 to 10ms at 75bps. 7514-06.EPS Figure 4 :Signal Detection Time Out PROGRAMMING REGISTER (RPROG) Address Data Selected Mode(note 1) D7 D6 D5 D4 D3 D2 D1 D0 X0000 X X The most significant bit (D7) is not used when decoding control register addresses. 0 X 0 1 Control register addressing is enabled when D7 = 0 (see note 2). 0 X 1 0 Control register addressing is enabled when D7 = 1 (see note 2). 0 0 X X Reception positioned in the channel opposite tothe transmission channel controlled by MC/BC 0 1 X X Reception positioned in the same channel as transmission (see note 3). 1 X X X Programming inhibited in normal operating mode. This mode is used for testing purposes. Notes :1. RPROG is set to 0000 on power-up. 2. Excepted for RPROG register whose address is always 000, regardless of D0 and D1. 3. This mode allows either full duplex operation on a 4-wire line, or circuit testing with external Tx/Rx loopback. TS7514

DTMF DIALING DATA REGISTER (RDTMF REGISTER) Address Data Tone Frequency (Hz) D7 D6 D5 D4 D3 D2 D1 D0 Low High P001XX00 6 9 7 X X X 0 1 770 X X X 1 0 852 X X X 1 1 941 X 0 0 X X X 1209 0 1 X X X 1336 1 0 X X X 1477 1 1 X X X 1633 Notes :This register is not initialized on power-up. X : don’t care value. P : 1,0 or X depending upon RPROG content. DATA REGISTER FOR THE TRANSMISSION ATTENUA TOR (RATE REGISTER) Address Data Attenuation (dB) Output Transmit Level (dBm) On Line Level (dBm) Coupler Gain (- 6dB)D7 D6 D5 D4 D3 D2 D1 D0 P0100000 0 + 4 – 2 0001 1 + 3 0010 2 + 2 – 4 0011 3 + 1 – 5 0100 4 0 – 6 0101 5 – 1 – 7 0110 6 – 2 – 8 0111 7 – 3 – 9 1000 8 – 4 – 1 0 1001 9 – 5 – 1 1 1010 1 0 – 6 – 1 2 1011 1 1 – 7 – 1 3 1100 1 2 – 8 – 1 4 1101 1 3 – 9 – 1 5 1 1 1 0 Infinite < – 64 < – 70 1 1 1 1 Infinite* < – 64 * < – 70 * * Power-up configuration. LINE MONITORING PROGRAMMING REGISTER (RWLO REGISTER) Address Data Line Monitoring In Transmit Mode Relative Level (dB) Line Monitoring In Receive Mode Relative Level (dB) D7 D6 D5 D4 D3 D2 D1 D0 P0110000 – 1 0 0001 – 2 0 0010 – 3 1 0011 – 4 2 0100 0 0101 – 1 0 0110 – 2 0 0111 – 3 1 1 0 0 0 0.42 V PP 1 0 0 1 – 10dB 1 0 1 0 – 20dB 1 0 1 1 – 31dB 1 1 X X < – 60dB* * Power-up configuration. Note :Signaling frequency is a square wave signal at 2982Hz. TS7514

RECEIVE FILTER SELECTION AND GAIN PROGRAMMING REGISTER (RPRF REGISTER) Address Data Reception Gain (dB)(note 1) Comments D7 D6 D5 D4 D3 D2 D1 D0 P101XX00 0 XX01 + 6 * XX10 + 1 2 X X 1 1 0 Rx Channel Band = Tx Channel B and Tx to Rx Loopback – 33dBm≤ Rx Level≤ 40dBm X 0 X X X Receive Filter Selected X 1 X X X Receive Filter Desabled

1 X X X X Receive Filter Disconnected from RDI

Output and from Demodulator. Offset Disabled. * Power-up configuration. Note 1 : Depending on the line length, the received signal can be amplified. Programmable reception gain allows a level close to +3dBm at the filter input to take benefit of the maximum filter dynamic range (S/N ratio). The following requirement must be met : max. line level + prog. gain≤+3dBm. TRANSMISSION FILTER PROGRAMMING REGISTER (RPTF REGISTER) Address Data ATO Transmission D7 D6 D5 D4 D3 D2 D1 D0 P 1 0 0 0 0 0 0 MODEM or DTMF Signal* 0 0 0 1 ATxI via Smoothing Filter and Attenuator 0 0 1 0 ATxI via Low-pass Filter and Attenuator 0 0 1 1 ATxI via Band-pass Filter and Attenuator 0 1 0 0 In DTMF Mode, Transmision of High Tone Frequency 1 0 0 0 In DTMF Mode, Transmission of Low Tone Frequency * Power-up configuration. HYSTERESIS AND SIGNAL DETECTION LEVEL PROGRAMMING REGISTER (RHDL REGISTER) Address Data N2 (dBm) (note 1) See Figure 4 N1/N2 (dB) D7 D6 D5 D4 D3 D2 D1 D0 P110X000 – 4 3 * X X001 – 4 1 X X010 – 3 9 X X011 – 3 7 X X100 – 3 5 X X101 – 3 3 X X110 – 3 1 X X111 – 2 9 X 0XXX X 3 * 1 X X X X 3.5 * Power-up configuration. Note 1 :Detection low level measured at the demodulator input. The line signal detection level is obtained by reducing the gain ate the filter. TS7514

Symbol Parameter Value Unit DGND DGND (digital ground) to AGND (analog ground) – 0.3, + 0.3 V V+ Supply Voltage V+ to DGND ro AGND – 0.3, + 7 V V– Supply Voltage V- to DGND or AGND – 7, + 0.3 V VI Voltage at any Digital Input DGND - 0.3, V+ + 0.3 V V in Voltage at any Analog Input V– 0.3, V + + 0.3 V Io Current at any Digital Output – 20, + 20 mA Iout Current at any Analog Output – 10, + 10 mA Ptot Power Dissipation 500 mW Top Operating Temperature 0, + 70 °C Tstg Storage Temperature – 65, + 150 °C Tlead Lead Temperature (soldering, 10s) + 260 °C If the Maximum Ratings are exceeded, permanent damage may be caused to the device. This is a stress rating only, and functional operation of the device under these or any other conditions for extendedperiods may affectdevice reliability. Standard CMOS handlingprocedures should be employed to avoid possible damage to the device. 7514-03.TBL ELECTRIC OPERATING CHARACTERISTICS Symbol Parameter Min. Typ. Max. Unit V+ Positive Supply Voltage 4.75 5 5.25 V V– Negative Supply Voltage – 5.25 – 5.0 – 4.75 V I+ V+ Operating Current – 10 15 mA I- V- Operating Current – 15 – 10 – mA 7514-04.TBL DC AND OPERATING CHARACTERISTICS Electrical characteristics are guaranteed over the complete temperature range, with typical load unless otherwise specified. Typical values are given for : V+ =+ 5 V ,V− = -5V and room temperature = 25oC Symbol Parameter Test Conditions Min. Typ. Max. Unit DIGITAL INTERFACE (MOD/DTMF, RTS, DCD, RxD, ZCO, TxD, MC/BC, ENP, PRD) VIL Input Voltage, Low Level – – 0.8 V VIH Input Voltage, High Level – 2.2 – – – IIL Input Current, Low Level DGND < V i<V IL (max) – 10 – 10 µA IIH Input Current, High Level V IH (min) < VI < V+ – 10 – 10 µA IOL Output Current, Low Level V OL = 0.4V 1.6 – – mA IOH Output Current, High Level V OH = 2.8V – – – 250 µA ANALOG INTERFACE-PROGRAMMABLE (ATxl) Vin Input Voltage Range – 1.8 – + 1.8 V Iin Input Current (filter output selected) – 10 – + 10 µA C in Input Capacitance (ATT output selected) – – 20 pF R in Input Resistance (ATT output selected) 100 – – k Ω ANALOG INTERFACE - TRANSMIT OUTPUT (ATO) (load conditions RL = 560Ω ,C L = 100pF) V OS Output Offset Voltage – 250 – + 250 mV C L Load Capacitance – – 100 pF R L Load Resistance – 560 – Ω Vout Output Voltage Swing – 1.8 – + 1.8 V R out Output Resistance 10 – 25 Ω – ATO Attenuation Ratio when RTS = 1 70 – – dB 7514-05.TBL TS7514

DC AND OPERATING CHARACTERISTICS (continued) Electrical characteristics are guaranteed over the complete temperature range, with typical load unless otherwise specified. Typical values are given for : V+ =+ 5 V ,V− = -5V and room temperature = 25oC Symbol Parameter Test Conditions Min. Typ. Max. Unit ANALOG INTERFACE - LINE MONITORING (WLO (load conditions , RL = 10kΩ ,C L = 50pF) VOS Output Offset Voltage – 250 – + 250 mV C L Load Capacitance – – 100 pF R L Load Resistance 10 – – k Ω Vout Output Voltage Swing – 1.8 – + 1.8 V R out Output Resistance – – 15 Ω – WLO Attenuation Ratio 70 – – dB ANALOG INTERFACE - DUPLEXER (RAI+, RAI-, RA0) Vin Input Voltage Range RAI+, RAI– –2 – +2 V lin Input Current RAI+, RAI– –10 – +10 µA C in Input Capacitance RAI+, RAI– – – 10 pF Voff Input Offset Voltage RAI+, RAI– –20 – +20 mV Vout Output voltage Swing, RA0 C L = 100pF R L = 600Ω R L = 300Ω –1.8 –0.9 +1.8 +0.9 V V C L Load Capacitance RA01 C L = 100pF – – 100 pF R L Load Resistance RA01 300 – – Ω G DC voltage Gain in Large Signals, RA01 C L = 100pF, RL = 300Ω 60 – – dB CMRR Common Mode Rejection Ratio, RA01, RA02 60 – – dB PSRR Supply Voltage Rejection Ratio, RA01, RA02 60 – – dB Vout Output Voltage Swing, RA02 C L = 50pF, RL = 10kΩ –2.5 – 2.5 pF C L Load Capacitance, RA02 – – 50 pF R L Load Resistance, RA02 10 – – k Ω AV O DC Voltage Gain in Large Signals, RA02 – – dB ANALOG INTERFACE-RECEIVE FILTER OUTPUT (RFO) Amplifier Limiter Input (RDI) Vin Input Voltage Range (RPRF = 1 xxx) – 2.2 – + 2.2 V R in Input Resistance (RPRF = 1 xxx) 1.5 – – k Ω C in Input Capacitance (RPRF = 1 xxx) – – 20 pF C L Load Capacitance (RPRF = 1 xxx) – – 50 pF R L Load Resistance 1.5 – – k Ω Vout Output Voltage Swing C L = 50pF, RL = 1.5kΩ – 1.8 – + 1.8 V R out Output Resistance – – 15 Ω DYNAMIC CHARACTERISTICS FOR PROGRAMMING REGISTER ACCESS (see Figures 5 and 6) tCYC (1) Cycle Time 600 – – ns Pwel(2) Pulse Width, RTS Low 300 – – ns PWeh (3) Pulse Width, RTS High 300 – – ns tr,tf (4) RTS Rise and Fall Times – – 50 ns tHCE (5) Control Input Holding Time 100 – – ns tSCE (6) Control Input Setup Time 300 – – ns tSDI (7) TxD or PRD Input Setup Time 200 – – ns tHDI (8) TxD or PRD Input Hold Time 100 – – ns tWW (9) TWW Input Writing Inpulsion Width (high level) 300 – – ns tBD (10) TxD Input Setup Time 100 – – ns tHD (11) TxD Input Hold Time 100 – – ns 7514-06.TBL TS7514

DC AND OPERATING CHARACTERISTICS (continued) Electrical characteristics are guaranteed over the complete temperature range, with typical load unless otherwise specified. Typical values are given for : V + =+ 5 V ,V− = -5V and room temperature = 25oC Symbol Parameter Test Conditions Min. Typ. Max. Unit TRANSMIT FILTER TRANSFER FUNCTION (load conditions : RL = 560Ω ,C L = 100pF) G HH Gain Relative to Gain at 1700Hz Band-pass < 390Hz = 390Hz = 450Hz = 1100Hz Band-pass or Low-pass 1100Hz to 2300Hz 3300Hz 5800Hz > 16000Hz - 0.5 - 0.5 -3 0 -3 5 -3 5 +0.5 +0.5 -1 5 -3 5 dB dB dB dB dB dB dB dB D AR Group Delay (modem transmission) Main Channel : from 380 to 460Hz Back Channel : from 1100 to 2300Hz 1.04 110 1.08 µs ms ATTENUATOR TRANSFER FUNCTION A R AT Attenuation Relative to Programmed Value Attenuation for Programmed Value =∞ - 0.5 +0.5 dB dB R LT Relative Attenuation between two Consecutive Steps 0.8 - 1.2 dB TRANSMIT GENERAL CHARACTERISTICS Modem Amplitude (Att = 0dB) 390Hz 450Hz 1300Hz 2100Hz +3.5 +3.5 +3.5 +3.5 +4.5 +4.5 +4.5 +4.5 dBm dBm dBm dBm DTMF Amplitude (Att = 0dB) - Low Frequency Group - Low Frequency Group versus Low Frequency Group +1.5 - 1.5 +2.5 dBm dB Psophometric Noise – – 250 µV RECEIVE FILTER TRANSFER FUNCTION G (0dB programmed) – 0.5 – + 0.5 dB G RR Gain Relative to the Gain at 1300Hz (0dB programmed) < 150Hz 150Hz to 450Hz 1300Hz 2100Hz 2300Hz 5500Hz to 10000Hz > 10000Hz – 0.5 1.1 1.8 –6 0 –5 0 0.5 2.3 2.7 –5 0 –6 0 dB dB dB dB dB dB dB G (back channel - narrow band) (0dB programmed) 0.5 – + 0.5 dB G RR Gain Relative to Gain at 420Hz (0dB programmed) < 150Hz 380Hz 400Hz to 440Hz 460Hz 1100Hz to 10000Hz > 10000Hz – 0.5 –5 0 + 0.5 + 0.5 + 0.5 –5 0 –6 0 dB dB dB dB dB dB G channel wide band) (0dB programmed) – 0.5 – + 0.5 dB G RR Gain Relative to Gain at 425Hz (0dB programmed) < 112Hz 275Hz 300Hz to 525Hz 575Hz 1375Hz to 10000Hz > 10000Hz – 0.5 –5 0 + 0.5 + 0.5 + 0.5 –5 0 –6 0 dB dB dB dB dB dB Psophometric Noise – – 300 µV 7514-07.TBL TS7514

DC AND OPERATING CHARACTERISTICS (continued) Electrical characteristics are guaranteed over the complete temperature range, with typical load unless otherwise specified. Typical values are given for : V + =+ 5 V ,V− = -5V and room temperature = 25oC Symbol Parameter Test Conditions Min. Typ. Max. Unit RECEIVE TRANSFER - GENERAL CHARACTERISTICS Absolute Filter Gain for : 0dB programmed 6dB programmed 12dBprogrammed – 0.5 + 5.5 + 11.5 + 0.5 + 6.5 12.5 dB R DS Signal Detection Level Relative to Programmed Value – 0.5 – + 0.5 dB R HY Hysteresis Value – 2 – – dB Signal Level (loop 3) at Reception Input – 40 – 35 – 33 dBm LINE MONITORING - GENERAL CHARACTERISTICS (load conditions : R L = 10kΩ ,C L = 50pF) R AT Attenuation Relative to Programmed Value Attenuation for Programmed Value +1 d B dB FS Buzzer Signalling Frequency – 2982 – Hz Signalling Frequency Amplitude at 0.42VPP Programmed 0.38 0.42 0.46 V PP 7514-08.TBL TS7514

POWER SUPPLIES DECOUPLING AND LAYOUT CONSIDERATIONS Powersuppliesto digital systemsmay containhigh amplitude spikes and other noise. To optimize per- formances of the TS7514 operating in close prox- imity to digital systems, supply and ground noise should be minimized. This involves attentionto powersupply design and circuit board layout. The power supplies should be bypassed with tan- talum or electrolytic capacitors to obtain noise free operation. These capacitors should be located close to the TS7514. The electrolytic type capaci- tors for improved high frequency performance. Power supplies connections should be short and direct. Ground loops should be avoided. +5V -5V 10µF1 0 µF External Signal 560Ω18kΩ 12kΩ 100nF To Loudspeaker Amplifier 39kΩ 6.8kΩ 2.2µF 270kΩ 1.5kΩ 1µF CTP 120Ω (670 90003) (*) L1/TPH1 TRISIL (TPA 270A 18) TPH2 Transfo. (EMT L 162) 12pF 12pF 3.579MHz (LS04) 4.7kΩ +5V 2N2222 1N4148 C O N T R O L S EXTAL U.A.R.T. M.C.U. (*) : RegulationRequired in France Only TxD RxD PRD RTS MC/BC MOD/DTMF ENP DCD ZCO XTAL OUT XTAL IN RDI RFO WLO RAO2 RAI2 ATO RAI1 RAO1 V+ATxI GNDD GNDA V- T S 560Ω12kΩ 100nF 100nF 7514-15.EPS TYPICALAPPLICATION INFORMATION TS7514

PM-DIP24.EPS PACKAGE MECHANICAL DATA

24 PINS - PLASTIC DIP

Dimensions Millimeters Inches a1 0.63 0.025 b 0.45 0.018 b1 0.23 0.31 0.009 0.012 b2 1.27 0.050 D 32.2 1.268 E 15.2 16.68 0.598 0.657 e 2.54 0.100 e3 27.94 1.100 F 14.1 0.555 I 4.445 0.175 L 3.3 0.130 DIP24.TBL TS7514

PMPLCC28.EP S PACKAGE MECHANICAL DATA

28 PINS - PLASTIC LEADED CHIP CARRIER PLCC)

Dimensions Millimeters Inches A 12.32 12.57 0.485 0.495 B 11.43 11.58 0.450 0.456 D 4.2 4.57 0.165 0.180 D1 2.29 3.04 0.090 0.120 D2 0.51 0.020 E 9.91 10.92 0.390 0.430 e 1.27 0.050 e3 7.62 0.300 F 0.46 0.018 F1 0.71 0.028 G 0.101 0.004 M 1.24 0.049 M1 1.143 0.045 PLCC28.TBL Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No licence is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previouslysupplied. STMicroelectronics products are not authorized for use as criticalcomp onentsin lifesupport devicesor systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics  1998 STMicroelectronics - All Rights Reserved Purchase of I 2C Components of STMicroelectronics, conveys a license under the Philips I2C Patent. Rights to use these components in a I2C system, is granted provided that the system conforms to the I2C Standard Specifications as defined by Philips. STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. http://www.st.com TS7514