UM9559E

UM9559E UMC | Alldatasheet

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CTRONICS 42 DEP q325a12 oooo427 4 r eee . a - | 9325812 UNITED MICROELECTRONICS 920 00427 D7:7¢5-07-0 [ES @Mume cd , UM9559E/F_ | Ey Tome Dialere 5 Ry : 7%. . a F : & -eatures ed = Low output tone distortion: 7% = Mute drivers on-chip ES © Wide operating supply voltage range: 2.6 to 10.0 volts ® On-chip generation of @ reference voltage to assure 3 & Uses TV crystal standard (3.58MHz) to derive all fre- amplitude stabitity Bs quencies thus providing very high accuracy and stability ™ Interfaces directly to a standard telephone push-button SE ® Oscillator bias resistor on-chip or calculator type XY keyboard 2 = Can be powered directly from telephone fine or from © Two options available on pin 16: bipolar output be ‘small batteries £: mode select F: chip disable + General Description a The UM9559E/F DTMF TONE GENERATOR are specially and temperature range and regulates the signal levels of designed to implement a dual tone telephone dialing the dual tones to meet the recommended telephone ine system. The device can interface directly to a standard dustry specifications. These features permit the UM 3 pushbutton telephone keyboard or calculator type XY —9BBQE/F to be incorporated with a slight modification s keyboard and operates directly from the telephone fines. of the standard 600 type telephone basic circuity to form ; Al necessary dual-tone frequencies are derived from the _@ pushbutton dual-tone telephone, Other applications of widely used TV crystal standard providing very high the device include radio and mobile telephones, remote 2 accuracy and stability, The required sinusoldal waveform control, point of sale, and credit card verification terminals for the individual tones Is digitally synthesized on ‘the and process control, The UMQ9559E/F are pin and func- : chip. This waveform so generated has very low total __ tionally compatible with the S2669C/E and S2589D/F, : harmonic distortion (7%). A voltage reference is generated respectively. x ‘on the chip which is stable over the operating voltage i Pin Configuration : Block Diagram . i woof . Voo CJ 1 16 [11 tone our fecal Bl eee xmit.[] 2 16 [7] Mosi/co LI . ets | «Om ne l etl a3 re noe at wilt MeB59E/F| tT al ov . i I, |] R3 og Te] f=] a ChSees oad ose C] 7 10 [mute oot] Lo . -osco[] 8 sta fl f) 3-22

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© UM9559E/F Absolute Maximum Ratings* “Comments DC Supply Voltage (Vpp — Veg) «+--+ +++ ++ #10.5V Stresses above those listed under “Absolute Maximum Electrical Characteristics ~ (Specifications apply over the operating temperature range of —25°C to +70°C unless otherwise noted. Absolute values of measured parameters are specified.) [renner [srmbot [vin [res [mon] unis [conto | OPERATING VOLTAGE mar isl OPERATING CURRENT Seg | 03 ua _| Yoo =30V No Key Selected, Tone, XMIT and MUTE Outputs Unloaded Standby Mode : ua _| Yop = 10.0V No Key Selected, Tone, XMIT and MUTE Outputs Unloaded ma | Yop =3.0V One Key Selected, Tone, XMIT and MUTE Outputs Unloaded Opérating Mode ma _| Yop ™ 10.0V One Key Selected, Tone, * : XMIT and MUTE Outputs Unloaded : Single Tone Mode Output Fai cGaumntw Row Tore] Bey | 10 | 20 | 80 | o | Vog=a8~100v Vop =3.0V lon = 18mA, OD 'OH a Output Voltage High Vpp =10.0V Io = 50MA, Output Source Leakage | current BA |Vpp =10.0V — Vog “OV ee }) 3-23 \\ '

a : UNITED MICROELECTRONICS 42 Dey 9325812 coop4e4 2 r _ 9325812 UNITED MICROELECTRONICS 92D 00429 =D F~2$-07-07 a Wumec UM9559E/F s SS TOME zi Electrical Characteristics (Continued) % v, v Vop ™ 2.78V No Key Depressed, = OL No Load : 2 v 3 ~~ pve | [ef] y | tad Z ‘OL No Load Pa ; Vpp = 2.75V One Key Depressed, ~ vow [2s [ae | |v [ieee * _ [vo [os [oo | |v | Ntad me s “NOH No Load : Sg Output Source Current = OSCILLATOR INPUT/OUTPUT Ll \\ ma | Yop =3.0V Vo, =0.6V, = oL One Key Selected 4 ink Cur ' _— [tm fom fer || ms | Oto kay eg ' ‘Ob ° " One Key Selected ma | Yoo =30V Voy =25V, = One Key Selected : Output Source Current Voo=100V Von =85V, Pe 042 ™A | one Key Selected 3 [sraer | | 2@ | 6 | om [vorsev Oscillator Startup Time : [ sramr |_| 026 | 4 | mw [Vp =100v Input/Output cpactonco | cw | | 1 | 16 [oF | INPUT CURRENTS Row8 column inpurssink |u| | © [| #A [¥op=80V Vy, =30V (pulldown) Vop *'3.0V Vy =2.5V (pull-up) Row & coiumn ints | tw [=| 210 || A | Yop r80V Vg =28V_ (putter) | =3,0V Vy =0.0V (pull-up) Mode Selected Input Source | tw | 14 | 38 | | WA |Vpp=80V Vig=00v (puller) _| Chip Disable Inpursink §=— |__| 39 [98 | | WA | Vp =30V_ Vy =3.0V (pulldown) 3-24 ' \\ :

Table 1. Comparisons of Specified vs Actual Tone —_signal consists of linear addition of two voice frequency 3 Rt 697 _ 69941 +0.30 in a row, column format (4 rows x 3 or 4 Columns) is . Table 2. XMIT and MUTE Output Functional : aie

“UNITED MICROELECTRONICS 42 DEP} 325812 o000431 o I - bea: { .9325812 UNITED MICROELECTRONICS 92D 00431 D7-75-07-07 4 — a Oume . UM9559E/F # Pin Descriptions MDSL is left floating (unconnected) or connected to Z Orcitetor (O8C1, 080) Vpp: both the Dual Tone and Single Tone modes are = UM9B59E/F contains an oscillator circuitwith thenecessary _--*Véllable. If MDSL Is connected to Vsg, the single tone & parasitic capacitances and bias resistor on chip so that mode is disabled and no output tone is Produced if an Es it is only necessary to connect the standard 3,68MHz attempt for single tone is made, UM9559F :do not have 3 TV Crystal accross the OSC! and OSCO terminals to the Mode Select option 2 implement the oscillator function. The oscillator func- . ee ___tlons whenever a row input is activated, . = Dual Tone Mode: When one row and one.column is Es selected (one key pressed) dual tone output consisting *. Keyboard (R1, R2, R3, R4, C1, C2, C3, C4) ‘of an appropriate low group and high group tone is & UMOBB9E/F functions as ective pull-down on the row generated, If two digit keys, that are not either in the % inputs end active pull-up on the column inputs when 2 came row or in the same column, are depressed, the dual ii key is depressed, When a key Is pushed a high level is 392046 made is esabled and no outputs provided, = fon one of the row inputs, the oscillator starts and the = keyboard scan logic turns on, The active pull-up or pull- € down resistors are selectively switched on and off as the __Single Tone Mode: Single tones either in the low group = keyboard scan logic determines the row and the column °F the high group can be generated as follows, A low = inputs that are selected. “The advantage of the scanning _-_-STOUP tone can be generated by depressing two digit keys 4 technique is that a keyboard arrangement of SPST key- in the appropriate row. A high group tone can be 2 board (4 rows x 3 or 4 columns) can be used, It can generated by depressing two digit keys in the appropriate 5 also interface with CMOS logic outputs directly, UM column, i.e., selecting the appropriate column input and ¥ 9559E/F requires active “High” logic levels. Since the two row inputs in that column, s active pull-up resistors in UM9559E/F are fairly low value . F {6002 type), diode can be used as shown in Fig, 1 to zl eliminate excessive sink current flowing into logic outputs hip Disable (CD) ; £ in their “Low” state, UMQSE9F has a Chip Disable (CD) input at pin 16 instead : of the Mode Select input. The chip disable is active 2 Tone Output (TONE) “high. When the chip disable ‘is active, the tone output = UMOS59E/F uses the Johnson counters and resistor ladder «8°88 * Vas» the row, column Inputs go into high : networks (See block diagram) to Synthesize the desired impedance state, the Oscillator is inhibited and the . two frequericies in sinewaves (See Fig. 2) and then uses ‘Mute and XMIT outputs go into active states. . the adder network to add these two frequencies end then drive a bipolar NPN transistor connected as emitter follower to allow proper Impedance transformation, at ‘Mute Outputs (MUTE) the same time preserving signal level, UM9559E/F have a CMOS buffer for the Mute output, With no keys depressed, the Mute output is “low”. When 8 key is depressed, the Mute output goes high, Mode Select (MDSL) and when Chip Disable is “high” the Mute output is UM9S69E has @ Mode Select (MDSL) input at pin 15.When - forced “low”, : See ) : 3-26 me

9325812 UNITED MICROELECTRONICS 92D 00432 D 7-2S+07-07 nf

7 C0 for UM9559F Version be 3

Figure 2. Stairstep Waveform of the Digitally Synthesized Sinewave

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500 NETWORK

21: 1N4742 ZENER 12 VOLT Ru 160M, Q2: 2N4401, Ry: 10KQ Qi: 2N440?, R1: 10KN, R2: 3OKQ; R3: 27KQ Ra: 2.4KR, RB: SOKA, Rg: 5.1K Qp.Qz: 2N4143 DI-D4:; 1N4004, XTAL: 3.58MHz ci: (001 nF ; See ‘Y ‘ 3-28 '