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1/21 msm6889 ? semiconductor general description the msm6889 is best suited to be used as a signal transmitter/receiver lsi for a telemetering system that employs a no-ringing communication system. the meter terminal of a telemetering system consists of this device, meter, ncu, and communication controller. the msm6889 contains a pb tone detector, a call progress tone (cpt) detector, a pb tone generator, and a 300-bps full-duplex modem conforming to itu-t v.21. features ? power supply : +5 v 10%, +2.5 v or higher for digital interface. ? power consumption operating mode : 9 ma typ., 12 ma max. power down mode : 0.1 ma max. ? the operating mode can be selected from pb tone transmit, pb tone detect, and fsk modem (answer/originate). the fsk modem cannot be operated concurrently with other functions. modem test modes are also available. ? the call progress tone (cpt) detector operates in pb tone transmit mode or in fsk modem mode. ? pb receiver output is 3-state, and externally connectable to 4-bit input for pb tone generator through the bus line. ? modem transmit/receive data, carrier detect, request to send, and call progress tone detect have their dedicated pins. ? prefilter and smoothing filter are provided in analog input and output. ? on-chip 3.579545 mhz crystal oscillator ? 3.579545 mhz master clock output pin (cmos compatible) ? power down mode ? modem : conforms to itu-t v.21 (300 bps, full-duplex) ? transmit analog signals (modem signal, dtmf tone) : level is independently adjustable externally. carrier detect level is also adjustable externally. ? package options: 42-pin plastic dip (dip42-p-600-2.54) (product name : msm6889rs) 56-pin plastic qfp (qfp56-p-1519-1.00-k) (product name : msm6889gsCk) e2a0027-16-x1 ? semiconductor msm6889 multi-function telecommunication lsi this version: jan. 1998 previous version: nov. 1996
2/21 msm6889 ? semiconductor block diagram ain- ain+ gar 2765 hz pre-lpf sg ao smooth + - +- gat2 gat1 pb mod vr2 vr1 sg lpf + - vref pon va ag vd dg vd2 power on +5 v (a) 0 v (a) +5 v (d) 0 v (d) digital interface pb tone generator pb-tone receiver 400 hz det timing status i/o con- trol carrier detect fsk modem mode select & test pb4 pb3 pb2 pb1 sp cp cd rd td rs clk x2 x1 x'tal 3.58 mhz * * * mode1 * mode2 * mode3 * ict1 * ict2 * ict3 * ten * pbg1 * pbg2 * pbg3 pbg4 micro- controller note) pb1 to pb4: 3-state outputs *with pull-up resistor 8 * *
3/21 msm6889 ? semiconductor pin configuration (top view) 42-pin plastic dip 1 42 2 41 3 40 4 39 5 38 6 37 7 36 8 35 9 34 10 33 11 32 12 31 13 30 14 29 15 28 16 27 17 26 18 25 19 24 20 23 21 22 va gar ain+ ainC ao sg gat1 gat2 mod pb vr1 vr2 ag pbg1 pbg2 pbg3 pbg4 ten td rs dg vd vd2 nc pon sp pb4 pb3 pb2 pb1 cp cd rd clk x2 x1 mode3 mode2 mode1 ict3 ict2 ict1 nc : no connect pin
4/21 msm6889 ? semiconductor 56-pin plastic qfp 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 42 41 40 39 38 37 36 35 34 33 32 31 30 29 56 55 54 53 52 51 50 49 48 47 46 45 44 43 nc pbg4 ten td nc rs dg ict1 ict2 nc ict3 mode1 mode2 mode3 nc ao ainC ain+ nc gar nc va vd nc vd2 pon sp nc pbg3 nc pbg2 pbg1 ag vr2 vr1 nc nc pb mod gat2 gat1 sg nc x1 x2 nc clk rd nc cd cp nc pb1 pb2 pb3 pb4 nc : no connect pin
5/21 msm6889 ? semiconductor pin description +5 v power supply (analog circuit). when power is turned on or the power down mode is released, the device must be put into the pb tone transmit mode or pb tone detect mode. va 35 1 output, non-inverting input and inverting input pins of on-chip operational amplifier. no hybrid transformer is required by use of these pins. (see fig. 2.) o gar 37 2 i ain+ 39 3 i ainC 40 4 analog signal output. pb tone or modem transmit signal is output from this pin. o ao 41 5 on-chip signal ground, having a potential of about +2.5 v. o sg 43 6 i gat1 44 7 o gat2 45 8 o mod 46 9 o pb 47 10 pb is the pb tone output and mod is the modem signal output. by connecting external resistors to gat1 and gat2 pins, signal level can be set at required values for the modem signal and the pb tone that are output from ao, independently. (see fig. 3.) these pins are used to externally adjust the received carrier detect(cd) signal level. the potential of vr1 to sg is about +1.1 v. the carrier detect level can be set at the required value by a on-chip resistor divider between vr1 and sg. the given potential to vr2 is set about +0.88 v with high resistance inside the ic. (see fig. 4.) o vr1 50 11 i vr2 51 12 analog ground, 0 v. ag 52 13 i* pbg1 53 14 i* pbg2 54 15 i* pbg3 56 16 i* pbg4 2 17 inputs used to specify pb tone to be sent. pb1 to pb4 can be connected externally like 4-bit bus line. data is latched at the falling edge of ten . (see fig. 7 and fig. 8.) description i/o name pin number gs rs * digital input pulled up by a high resistance inside the ic.
6/21 msm6889 ? semiconductor pb tone transmit enable. pbg1 to pbg4 data are latched at the falling edge of ten , and pb tone is generated at digital "0" level. (see fig. 7.) i* ten 3 18 modem transmit serial data input. data stream less than 300 bps should be input. digital "1" and "0" correspond to "mark" and "space" respectively. i* td 4 19 request to send data input . while rs is at digital "0" level, modem transmit is enabled. i* rs 6 20 digital ground, 0 v. dg 7 21 i* ict2 9 23 i* ict3 11 24 used to check performance characteristics of the ic. description i/o name pin number gs rs input used to select call progress tone (cpt) detect output waveform. (see fig. 9.) i* ict1 8 22 independent of operating mode. leave these pins open. i* mode1 12 25 i* mode2 13 26 inputs used to specify operating mode. (see table 1.) i* mode3 14 27 3.579545 mhz crystal resonator should be connected to x1 and x2. when applying external clock to the device, it should be connected to x2 through the ac coupling capacitor of 100 pf and x1 has to be open. i x1 16 28 o x2 17 29 3.579545 mhz clock output. o clk 19 30 modem receive serial data output. digital "1" and "0" correspond to "mark" and "space" respectively. when cd (carrier detect) is off, rd is hold at "mark" state. carrier detect output. digital "0" and "1" represent "detect" and "no-detect" respectively. o rd 20 31 o cd 22 32 * digital input pulled up by a high resistance inside the ic.
7/21 msm6889 ? semiconductor call progress tone (cpt) detect output. when a cpt is detected, the waveform selected by ict1 is output. (see fig. 9. ) o cp 23 33 description i/o name pin number gs rs o pb2 26 35 o pb3 27 36 receive pb tone code outputs. the output impedance of these pins becomes high except when the device operates as pb tone receiver. (see fig. 7 and fig. 8. ) o pb4 28 37 +5 v power supply (digital circuit). when power is turned on or the power down mode is released, the device must be put into the pb tone transmit mode or pb tone detect mode. vd 34 42 o pb1 25 34 pb tone receive data present. digital "1" represents that this pin is receiving the pb tone. (see fig. 8. ) o sp 30 38 i pon 31 39 power down mode select. digital "1" on this pin puts the whole circuit of the device into the power down state. nc 40 no connection. vd2 32 41 power supply for digital interface output. the supply voltage from +2.5 v to vd is possible for vd2. for example, when the device interfaces to the mcu working on +3 v supply, the +3 v supply has to be applied to the vd2 pin. note that this function is effective to all of digital output pins except x1, x2, and clk. there is no restriction regarding the power supplies (vd and vd2) applying procedure.
8/21 msm6889 ? semiconductor absolute maximum ratings parameter condition va, vd vd2 rating C0.3 to 7 C0.3 to vd C0.3 to va(vd) + 0.3 C65 to 150 260 unit v ?c symbol power supply voltage input pin voltage storage temperature pin soldering temperature ta = 25?c with respect to ag and dg within 10 sec recommended operating conditions power supply voltage symbol va, vd vd2 4.5 2.5 5.0 5.5 vd v digital input voltage v ih v il 2.0 0 vd 0.8 v digital output current i oh i ol C0.05 0.4 ma when vd2 = vd (excluding) x2 t op C40 +85 c operating temperature f clk C0.1 +0.1 % input clock frequency bypass capacitance va vd, vd2 0.1 + 10 1 m f frequency deviation at 25c 5c C100 +100 ppm at C40c to 85c C50 +50 temperature characteristics 50 equivalent series resistance w load capacitance 16 pf crystal condition min. typ. max. unit parameter
9/21 msm6889 ? semiconductor electrical characteristics dc and digital interface characteristics (va, vd, vd2 = +5 v 10%, ta = C40?c to +85?c) digital output voltage v oh i o = i oh min. 2.4 vd2 v digital input current* i ih v i = v ih max. C10 10 m a power supply current i ad pon = "0" 9 12 ma i pd pon = "1" 0.01 0.1 ma i il v i = v il min. C100 10 v ol i o = i ol max. 0 0.4 i a + i d + i d2 (vd2 = vd) parameter symbol min. typ. max. unit condition * internal p ull-u p resistor vd2 = vd analog interface and dynamic characteristics parameter condition min. typ. max. unit va 2 va + 0.1 2 (vd = va = 5 v 10%, ta = C40?c to +85?c) dbm v p-p +1 2.46 C1 1.95 C3 1.55 pbg1 to pbg4 input data hold time pbg1 to pbg4 input data setup time pb tone distortion pb tone frequency out-of-band energy modem transmit carrier frequency output dc voltage signal level relative value output load resistance output voltage swing pb tone send level modem transmit level mod pb ao mod, pb, gat2, ao modem pb tone mod, pb ao (when gat1 and gat2 are connected) with respect to nominal frequency harmonics/fundamental tpbgs, fig. 7 tpbgh, fig. 7 r l 3 20 k w "mark" and "space" signals r l 3 20 k w r l 3 20 k w low-group tone high-group tone "mark" & "space" signals high-gr. tone & low-gr. tone p : in-band signal energy (0.3 khz to 3.4 khz) measured at primary side of transformer line. 4 to 8 khz 8 to 12 khz 12 khz to C8.5 C7.5 2.2 20 C2 0 C 0.1 976 1176 C1.5 250 250 va 2 C6.5 C5.5 3 0 1 980 1180 C4.5 C3.5 2 2 984 1184 p-20 p-40 p-60 +1.5 C23 dbm dbm vp-p k w db db db db db % db ns ns v 1646 1846 1650 1654 hz 1850 1854 originate mode answer mode mark space mark space td "1" "0" "1" "0"
10/21 msm6889 ? semiconductor analog interface and dynamic characteristics (continued) (vd = va = 5 v 10%, ta = C40?c to +85?c) parameter condition min. typ. max. unit modem receive signal level ain+, fsk demodulator signal C6 dbm carrier detect (cd) signal level vr2; open C42 dbm off ? on on ? off answer mode: 1080 hz originate mode: 1750 hz C48 dbm answer mode: 1080 hz originate mode: 1750 hz 1db cd level hysteresis C60 dbm ? C20 dbm step 10 40 ms cd delay time C20 dbm ? C60 dbm step 0 40 ms cd hold time 300 bps, 1/0 alternative pattern 10 % demod. data bias distortion vnrts/v receive modem signal nrts: 2765 hz 30 hz C2db nrts signal-to-modem receive signal ratio 400 hz C40 C6 dbm cpt detect level 400 hz C60 dbm cpt non-detect level r > 20% (square waves output) (see fig. 9) 380 420 hz cpt detect frequency r > 20% (square waves output) (see fig. 9) cpt non-detect frequency 500 hz 300 20 ms cpt detect delay time 20 ms cpt detect hold time for each signal tone C46 C6 dbm pb tone detect amplitude for each signal tone C60 dbm pb tone non-detect amplitude with respect to nominal frequency 1.5 % detect frequency with respect to nominal frequency 3.8 % non-detect frequency high-gr. tone/low-gr. tone C6 +6 db allowable twist noise (0.3 khz to 3.4 khz) level/tone level C12 db allowable noise level 380 hz to 420 hz 37 db dial tone rejection ratio t c 120 ms signal repetition time t s 49ms time to receive t i 24ms invalid tone duration t g 24 39 49 ms output delay time t p 30ms interdigit pause t b 2 ms acceptable drop out t sp 6 8 10 ms sp delay time t d 21 28 35 ms output trailing edge delay fig. 1 input impedance ain+, 0 to 10 khz 20 k w
11/21 msm6889 ? semiconductor ain signal pb1 to pb4 sp t c t s t p t b t g t d t sp figure 1
12/21 msm6889 ? semiconductor figure 2 c1 is an ignorable impedance in the voice frequency band; therefore, if a line transformer and phone line impedance are ideal (r l = 600 w pure resistance), the signal levels at each point are as shown below. vt, vr : transmit at 2w on phone line, receive signal level (balanced) vt1, vr1 : transmit at pin 3 (ain+), receive signal level (unbalanced) vao : transmit signal level at pin 5 (ao) (unbalanced) vt2 : leaking of transmit signal into receive circuit (unbalanced) vr2 : receive signal level of the device (unbalanced) 1) vt = vt1 = 1/2 vao the transmit signal level (voltage) on phone line is half the level at the output pin (ao) of the device. (600 w : a 600 w line transformer is used) 2) vr1 = vr 3) then, where r2 = r3 (e.g., 51 k w) , vt2 = 0. this means that the transmit signal is no longer leaking into the receive circuit. 4) r l vt vr 600 w : 600 w c1 2.2 m f r1 600 w r2 r3 vt1,vr1 vao + C + C r2,r3 3 20 k w ao ain+ ainC gar vt2,vr2 3 4 2 5 functional description and application resistance hybrid condition (ideal condition) vt2 = vt1 (1+ ) + vao (C ) r3 r2 r3 r2 = vao (1+ ) C vao = vao (1C ) r3 r2 r3 r2 1 2 r3 r2 1 2 vr2 = vr1 (1+ ) , where r2 = r3, vr2 = 2 vr1 = 2 vr r3 r2
13/21 msm6889 ? semiconductor figure 3 the modulation analog signal and pb tone from the modem are not sent at a time. the signal to be sent is determined by the operating mode specified. this device is provided with the pins for specifying levels of these transmit signals independently. the answer tones, which are generated from modulator, are handled as modem signals. vm : modem signal level (voltage) at mod (pin 9) vp : pb tone level (voltage) at pb (pin 10) when the external resistors are r4, r5 and r6, the signal levels at ao (pin 5) are as shown below. note : r4, r5, r6 3 20 k w as described in "resistance hybrid condition", signal levels actually sent over a phone line will be half the above mentioned values under the ideal condition. setup of transmit signal levels 5 8 7 10 9 vao r4 r5 r6 vp vm ao gat2 gat1 pb mod pb tone generator modulator r4,r5,r6 3 20 k w lpf + _ vao (modem) = r4 vm r5 vao (pb) = r4 vp r6
14/21 msm6889 ? semiconductor external setup of carrier detect level r1 r2 r1 r2 vr1 vr2 sg vref comp r1//r1 + r2//r2 3 20 k w r1: 250 k w , r2 : 1 m w 11 12 6 * mode select functional block operating mode cpt rec. pb gen. pb rec. fsk modem ict1 = 1 ict1 = 0 123 0 1 o 1 0 1 0 0 1 1 0 0 0 0 0 0 1 1 pb tone transmit pb tone detect originate mode modem (o) answer mode modem (a) analog loop back test (alb) remote digtal loop back test (rdlb) * ** * * 011 111 a o a * * * * * * * * 0 * * : active when power is turned on or the power down mode is released, put the device into the pb tone transmit mode or pb tone detect mode. figure 4 operating mode table 1 operating mode table
15/21 msm6889 ? semiconductor line ain ao transmit filter demodulator modulator rd td receive data transmit data receive filter signal flow concept for the modem normal operating mode is shown in fig. 5. figure 5 in the test modes, signal flow shown in fig. 6 is used. o/(originate)/a(answer) in the test mode is the expression where the modulator side is referred to as the basis. [alb] ain ao receive filter demodulator rd td receive data transmit data [rdlb] ain ao receive filter demodulator modulator rd td receive data transmit data transmit filter modulator transmit filter figure 6
16/21 msm6889 ? semiconductor pb tone transmit mode and pb tone detect mode when pbg1 to pbg4 are externally connected to pb1 to pb4 so as to use them as 4-bit bus lines, their tone generation timings are as shown below. 1) pb tone transmit mode when ten is in the digital "0" state, pb tone is generated according to table 2. ten pbg1/pb1 pbg2/pb2 pbg3/pb3 pbg4/pb4 pb tpbgs tpbgh 941 hz + 1477 hz figure 7 2) pb tone detect mode ain pb1/pbg1 pb2/pbg2 pb3/pbg3 pb4/pbg4 tg td "0" "1" "0" "1" "1" "1" "1" tsp "0" sp 941 hz + 1477 hz 852 hz + 1209 hz figure 8
17/21 msm6889 ? semiconductor table 2 pb tone code table button low-group freq. (hz) high-group freq. (hz) 697 770 852 941 1209 1336 1477 1633 pb4/ pbg4 pb3/ pbg3 pb2/ pbg2 pb1/ pbg1 1 2 3 4 5 6 7 8 9 0 * # a b c d * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 call progress tone (cpt) detect mode ain cp ict1 = "1" cp ict1 = "0" 400 hz tw td r = tw/(td + tw) 100 [%] figure 9
18/21 msm6889 ? semiconductor application circuit pin connection 1 va 2 gar 3 ain+ 4 ainC 5 ao 6 sg 7 gat1 8 gat2 9 mod 10 pb 11 vr1 12 vr2 13 ag 14 pbg1 15 pbg2 16 pbg3 17 pbg4 18 ten 19 td 20 rs 21 dg 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 vd vd2 nc pon sp pb4 pb3 pb2 pb1 cp cd rd clk x2 x1 mode3 mode2 mode1 ict3 ict2 ict1 msm6889rs C + C + c2 c3 r3 c1 r1 r2 + C r4 r5 r6 3.579545 mhz r1 = 600 w , r2 = r3 = r4 = r5 = r6 = 51 k w c1 = 2 m f, c2 = c3 = 10 m f
19/21 msm6889 ? semiconductor bypass capacitor connections the msm6889 contains analog circuits. note that noise occurred in the power supply by trouble in other circuits may cause degradation in characteristics of the device. the examples of connected bypass capacitors of the msm6889 are shown below. va, vd sg ag, dg msm6889 10 m f to 47 m f va, vd sg ag, dg msm6889 10 m f to 47 m f 1 m f 1 m f va, vd sg ag, dg msm6889 10 m f to 47 m f *1 m f 10 m f 10 m f * laminated ceramic ca p acitor
20/21 msm6889 ? semiconductor (unit : mm) package dimensions dip42-p-600-2.54 package material lead frame material pin treatment solder plate thickness package weight (g) epoxy resin 42 alloy solder plating 5 m m or more 6.20 typ.
21/21 msm6889 ? semiconductor (unit : mm) notes for mounting the surface mount type package the sop, qfp, tsop, soj, qfj (plcc), shp and bga are surface mount type packages, which are very susceptible to heat in reflow mounting and humidity absorbed in storage. therefore, before you perform reflow mounting, contact okis responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times). qfp56-p-1519-1.00-k package material lead frame material pin treatment solder plate thickness package weight (g) epoxy resin 42 alloy solder plating 5 m m or more 1.46 typ. mirror finish

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