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em91210 series tone/pulse switchable dialer with lcd interface 1 * this specification are subject to be changed without notice. 10.1.1997 general description the em91210 is a series of tone/pulse switchable dialers that is composed of t/p dialer and t/p dialer with 10 set memories. the em91210 series provides necessary functions of telephone set for application in any environment, such as pulse dialing, tone (dtmf) dialing, handfree dialing, keying tone , mute and pulse mute functions. beside this, sdo (serial data output) functions is provided in advance version that is designed to drive lcd driver and voice synthesizer. in this application, the dialing numbers can be displayed on lcd screen with em32100 ( or em32116 ). features ? tone/pulse switchable. ? wide operating voltage from 2.0 v to 5.5 v. ? low operating current, 0.15 ma (pulse) and 0.3 ma (tone) typically. ? adding resistor on keyboard scan pin that can select many telephone specifications, such as : pulse rate, m/b ratio, flash time, pause time, p-t wait time and keyboard type. ? sdo function supports lcd driver and voice synthesizer to indicate dialing numbers. ? handfree function provides on-hook dialing and speakerphone application. ? 10-set two touch repertory memory, each one can store data up to 16 digits. ? a 32-digit lnb (last number) redial memory. ? a 32-digit save redial memory. ? keytone function provides rapidly keying recognition. ? pulse mute function supports pulse dialing application. ? using 3.579545 mhz crystal or ceramic resonator. ? package forms: pdip, skinny. ordering information versions list version lnb kt save hf sdo(lcd) pmute EM91210A ? ? ? ? em91210b ? ? ? ? ? em91210c ? ? ? ? ? ? em91210 series tone/pulse switchable dialer with lcd interface
em91210 series tone/pulse switchable dialer with lcd interface 2 * this specification are subject to be changed without notice. 10.1.1997 functional block diagram keyboard arrangement type a type b em91210 pin assignment col5 col4/kt col3 col2 col1 xin xout xmute vss 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 pm po row4 row3 row2 row1 hks vdd dtmf EM91210Ap col5 col4/kt col3 col2 col1 xin xout xmute vss hfi 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 pm po row4 row3 row2 row1 hks vdd dtmf hfo em91210bp nc col5 col4/kt col3 col2 col1 xin xout xmute vss hfi 1 2 3 4 5 6 7 8 9 10 11 22 21 20 19 18 17 16 15 14 13 12 sdo pm po row4 row3 row2 row1 hks vdd dtmf hfo em91210ck row1 row2 row3 row4 col1 1 4 7 */t col2 2 5 8 0 col3 3 6 9 # col4/kt save f a rd/p col5 st row1 row2 row3 row4 col1 1 4 7 * col2 2 5 8 0 col3 3 6 9 # col4/kt save f a rd/p col5 p ? t st col1 col2 col3 col4/kt col5 xin xout row1 row4 hfo pm xmute keyboard interface (column) oscillator keyboard interface (row) output circuit memory (melody) timing/control circuit input circuit pulse generator latch & decoder d/a converter row/column programming counter dtmf po hks hfi vdd vdd sdo ~
em91210 series tone/pulse switchable dialer with lcd interface 3 * this specification are subject to be changed without notice. 10.1.1997 pin descriptions symbol function row1~row4 keyboard scan pins of row group. in idle state (hks is high and hfo is low), these pins stay high impedance level to prevent power consumption. otherwise, these pins switch to high level for detecting keyboard entry. these pins will output 600 hz signal while keyboard is scanning. col1~col3 and col5 keyboard scan pins of column group. in idle state, these pins stay high impedance level. otherwise these pins switch to low level for detecting keyboard entry. these pins will output 600 hz signal while keyboard is scanning. col4/kt the fourth column group pin of the keyboard that also provides the keytone output . normally, this pin stays low level for detecting keyboard entry. after a valid keyboard entry, this pin will output keying confirmation tone that is 600 hz signal and 30 ms duration. while dtmf output, the key tone will be disabled. xin and xout oscillator input and output pins. a 3.579545 mhz crystal or ceramic resonator must be crossed connection to xin and xout pins which generate system clock. xmute the tone/pulse mute signal output pin that is nmos open-drain output structure. this pin will switch to low level during tone/pulse dialing. otherwise, this pin stays high impedance level. v dd and v ss positive and negative power supply input pins. recommended operating voltage from 2.0vdc to 5.5vdc. hfi handfree inputs pin which accepts falling edge signal to turn on or turn off handfree function. this pin is hysteresis input structure and built-in pull up resistor (typically 200 kohms). hfo handfree outputs pin that is designed to control telephone line for on-hook dialing or control speakerphone circuit for handfree conversation. when handfree function is executed, this pin will switch tohigh. otherwise, this pin stays low level. dtmf the dtmf (dual tone multi-frequency) output pin. normally, this pin stayslow level. in tone dialing mode, this pin will output dtmf signal that is corresponding to keyboard 0..9, * and # keys. hks control signal inputs pin that is corresponding hook switch status. when handset was left from cradle, this pin must be connected to low level to operate all functions. otherwise, this pin must be connected to high level to disable all function and prevent power consumption. po pulse signal outputs pin that is nmos open-drain output structure. normally, this pin stays high impedance level. in pulse dialing mode and keypad was entry. this pin will output pulse trains signal that is corresponding to keyboard 0 .. 9 keys. pm pulse signal outputs pin that is cmos inverter output structure. normally, this pin stays low level. during pulse signal dialing or flash function executing, this pin will switch to high level to control the external circuit. sdo sdo function output that is nmos open-drain structure. when there is a valid entry on keyboard, this pin will output a serial data. this serial data is designed to drive lcd driver to display dialing number on lcd screen or drive voice synthesizer to announce dialing number to speaker. nc no connection.
em91210 series tone/pulse switchable dialer with lcd interface 4 * this specification are subject to be changed without notice. 10.1.1997 function descriptions dialing signal selection the em91210 series incorporated a special keyboard scanning function that is connecting a resistor (typically is 560 kohms) on keyboard scan pin to select many telephone specifications. the specifications are described as following : a. mode b. m/b ratio row1 mode row2 mbr (%) r-vdd 20 pps nr 40:60 nr tone r-vss 33:66 r-vss 10 pps c. flash time d. dtmf signal row3 row4 tf (ms) col1 td (ms) titp (ms) nr nr 600 r-vdd 90 90 nr r-vss 100 nr 98 98 r-vss nr 80 r-vss 83 83 r-vss r-vss 300 e. pause time and p-t wait time f. keyboard operate type col2 tp (sec) tpt (ms) col3 type nr 3.6 3.6 nr a r-vss 2.0 2.0 r-vss b normal dialing directly keying digital key on keyboard which number can be dialing output and stored in lnb memory automatically. operating procedure described as follow : ? to select pulse or tone mode. ? off-hook or turn on hf function. ? keying d1, d2, .. , dn. the d expressed digital keypad that included 1~9, *, 0, #, p, and p ? t keys. the n expressed unlimited. ? the numbers d1, d2, .. , dn will be dialed out in pulse or tone mode as selection. lnb redial memory storing: in normal dialing mode, every digital key was entry which number will be stored in lnb memory automatically. if entry digits are more than 32 digits, the redial function of lnb memory will be disabled. otherwise, these numbers stored in lnb memory can be redial output. redialing: after normal dialing, directly keying f key (or on-off hook once) and keying rd key on keyboard. the numbers that are stored into lnb memory will be dialed output. save redial memory the save meomry is designed in em91210 series to support 32 digits capacity buffer for second redial, pager, memory and other system applications.
em91210 series tone/pulse switchable dialer with lcd interface 5 * this specification are subject to be changed without notice. 10.1.1997 storing : em91210 series support two operating methods to store numbers into save redial memory. method 1 ? to select pulse or tone mode. ? off-hook (or turn on hf function), push d1, d2, .. , dn. the numbers d1, d2, .. , dn will be dialed out in pulse or tone mode as selection. ? after dn had been dialed out and push [st], save key. if the keying numbers are more than 32 digits that content of save memory can not be updated. otherwise, these numbers will be stored into save memory. in the [] key allows to be omitted. method 2 off-hook (or turn on hf function), push st, d1, d2, .. , dn, [st], save . if the keying numbers are not over 32 digits, the numbers d1, d2, .. , dn will be stored in save redial memory automatically. dialing : ? to select pulse or tone mode. ? off-hook (or turn on hf function), push save key. the numbers stored in save memory will be dialed out in pulse or tone mode as selection. repertory memory the em91210 series incorporated several sets repertory memory and each one can store number up to 16 digits. in memory storing, if stored numbers are more than 16 digits that only the previous 16 digits can be stored into specific memory. otherwise, these numbers can be stored entirely. after memory dialed out, the content of lnb is keeping to current data. storing of 10 sets memory types indirect (two-touch) operation off-hook (or turn on hf function), push st, d1, d2, .. , dn, st, n. the numbers d1, d2, .. , dn will be stored into memory location n. the n expressed digital key from 0 to 9. dialing (after memory dialed out, the content of lnb is keeping to current data) indirect (two-touch) of 10 sets memory ? to select pulse or tone mode. ? off-hook (or turn on hf function), push a, n key. the numbers that are stored in indirect memory location n will be dialed out in pulse or tone mode as selection. the n expressed digital key from 0 to 9. pause (p) key operation the pause (p) key is designed to support pause operation in dialing duration. p key can be stored in memory and it will occupy one digital position.
em91210 series tone/pulse switchable dialer with lcd interface 6 * this specification are subject to be changed without notice. 10.1.1997 ? to select pulse or tone mode. ? off-hook (or turn on hf function), push d1, d2, .. , dn, rd/p, k1, k2, .. , kn . these numbers will be dialed out as following sequence: d1, d2, .. , dn, tp, k1, k2, .. , kn. pulse to tone (*/t or p-t) key operation the pulse to tone (*/t or p-t) key is designed to support toll dialing (long distance call) or pabx system operation. the "*/t (or p-t)" key can be stored in memory and it will occupy one digital position. ? to select pulse mode. ? off-hook (or turn on hf function), push d1, d2, .. , dn, */t, ( or p-t) k1, k2, .. , kn. these numbers will be dialed out as following sequence: d1, d2, .. , dn, tpt, k1, k2, .. , kn. (pulse mode) (tone mode) flash (f) key operation the flash (f) key is designed to break telephone line temporarily. after f key is depressed, this dialer will send a flash signal to break line 600 ms, 300 ms, 100 ms or 80 ms as row3 and row4 selection. handfree (hf) function the handfree function is designed to support on-hook dialing and loudspeaker application which can be turn on or off with falling edge signal from hfi pin. during handfree function is executed, the hfo pin is switched to high. otherwise the hfo pin stays low level. truth table operating state input/output pin level hks po xmute pm hfo (0) on-hook, idle state h f f l l (1) off-hook line l f f l l (2) off-hook, hf line l f f l h (3) on-hook, hf line h f f l h note : f=floating (high impedance); h=logic high; l=logic low level. sdo (serial data output) function the sdo is serial data output which format is same as uart protocol. sdo function is designed to drive lcd driver and voice synthesizer. so the dialing numbers can be display on lcd screen with em32100 (or em32116 ). the sdo signal consists of two start bits, six data bits and two stop bits. each bit time is about 3.9 ms (256 hz) and output sequences are following by start bits, data bits (lsb to msb) and stop bits. 0 1 bit 0 bit1 bit2 bit3 bit4 bit5 ready start bits data bits 0 1 stop bits
em91210 series tone/pulse switchable dialer with lcd interface 7 * this specification are subject to be changed without notice. 10.1.1997 sdo keypad encoded table: digital key (b5,b4=0,0) keypad 1 2 3 4 56789 0 */t # p */t or p-t output b3,b2,b1,b0 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 display 1 2 3 4 56789 0 ?? p function key (b5,b4=1,0) keypad f output b3,b2,b1,b0 1111 display clear all display * keypad,sdo format and lcd display reference table: keypad bit5 bit4 bit3 bit2 bit1 bit0 display 1000001 1 2000010 2 3000011 3 4000100 4 5000101 5 6000110 6 7000111 7 8001000 8 9001001 9 0001010 0 */t 0 0 1 0 1 1 ? #001100 ? p001101 p */t or p-t 0 0 1 1 1 0 f 1 0 1 1 1 1 clear all display
em91210 series tone/pulse switchable dialer with lcd interface 8 * this specification are subject to be changed without notice. 10.1.1997 electrical characteristics (ambient temperature is 25 c, v dd =2.5v unless otherwise noted, all voltages referenced to v ss , fosc=3.579545 mhz) parameter sym. min. typ. max. unit condition operating voltage pulse 2.0 - 5.5 v unload tone 2.0 - 5.5 operating current(hks=0) pulse idd - 0.15 0.3 unload tone - 0.3 0.5 ma pulse - 0.15 0.3 with pull up/down tone - 0.3 0.5 resistor * 8 memory retention current imrt - 0.001 0.1 ua hks=1,vdd=1v standby current hks=1 istby - 0.001 0.1 unload hks=0 - 1 10 ua hks=1 -0.001 0.1 with pull up/down hks=0 - 10 30 resistor * 8 hks, hfi vih 0.8vdd - vdd v pins: input voltage vil vss - 0.2vdd hfo & pm pins source current ioh 0.2 - - ma vo = 2.0 v po, hfo, xmute, iol -0.2 - - ma vo = 0.5 v & pm, sdo pins: sink current po, xmute and sdo ioh - - 0.001 ua vo = vdd pins: leakage current hfi pin input resistance rhfi - 200 - k w vhfi = vss keyboard scanning pins ioh 2 10 50 ua vksn=vss output current (except col4/kt) iol 200 400 800 vksn=vdd col4/kt source current ioh 0.2 - - ma vo=2.0v sink current iol 0.2 - - vo=0.5v absolute maximum ratings (ambient temperature is 25 c, all voltages referenced to v ss ) items sym. rating unit power supply voltage v dd 6.0 vdc v input voltage range v in v ss -0.3v ~ v dd +0.3v v operating temperature t opr 0 ~ +50 c storage temperature t sto -55 ~ 125 c power consumption p d 500 mw
em91210 series tone/pulse switchable dialer with lcd interface 9 * this specification are subject to be changed without notice. 10.1.1997 keyboard debounce time tdb - 20 - ms key tone signal: frequency fkt - 600 - hz present duration tkt - 30 - ms pause time and pulse to tone tp - 3.6 - sec. col2=nr tpt - 2 - sec. col2=r-vss flash time tf - 600 - row3, row4=nr, nr - 100 - ms row3, row4=nr, r-vss - 80 - row3, row4=r-vss, nr - 300 - row3, row4=r-vss,r-vss flash pause time tfp - 300 - ms pulse rate psr - 20 - pps row1 = r-vdd - 10 - row1 = r-vss make/break ratio mbr - 40:60 - % row2 = nr - 33:66 - row2 = r-vss inter-digit pause time tidp - 800 - ms psr = 10 pps - 500 - psr = 20 pps dtmf pin: sink current iol -0.2 - - ma vdtmf = 0.5 v dtmf signal dc level vdc 0.5 - 0.75 vdd vdd = 2.0v ~ 5.5v dtmf signal: ac level vdtmf 142 160 180 mvrms row group pre-emphase twist 1 2 3 db column - row distortion thd - -30 -23 db rl = 5 k w load resistance zl 5 - - k w thd <- 23db 96 98 100 minimum tone duration t d 88 90 92 ms memory dialing 81 83 85 96 98 100 minimum inter-tone pause titp 88 90 92 ms memory dialing 81 83 85 sdo every bit time tbit 3.8 3.9 4.1 ms parameter sym. min. typ. max. unit condition electrical characteristic (ambient temperature is 25 c, v dd =2.5v unless otherwise noted, all voltages referenced to vss,fosc=3.579545 mhz) dtmf output frequency (fosc = 3.579545 mhz) keyboard scan pin ccitt standard (hz) actual output (hz) deviation (%) row1 (f1) 697 699.1 0.30 row2 (f2) 770 766.2 0.49 row3 (f3) 852 847.4 -0.53 row4 (f4) 941 947.9 0.73 col1 (f5) 1209 1215.8 0.56 col2 (f6) 1336 1331.6 -0.32 col3 (f7) 1477 1471.8 -0.35
em91210 series tone/pulse switchable dialer with lcd interface 10 * this specification are subject to be changed without notice. 10.1.1997 timing diagram figure 1. pulse mode operating timing figure 2. dtmf mode operating timing hks key in kt xmute pm sdo po dtmf osc. tdb tkt 2 3 tm tidp t b t m t b t m tidp tsdo hi-impedance hks key in kt xmute pm sdo po dtmf osc. tdb 2 3 td titp titp hi-impedance
em91210 series tone/pulse switchable dialer with lcd interface 11 * this specification are subject to be changed without notice. 10.1.1997 figure 3. pulse mode lnb redial timing hks key in kt xmute pm sdo po dtmf osc. tdb tkt rd tm tidp t b t m t b t m tidp lnb=2,3 hi-impedance figure 4. dtmf mode lnb redial timing hks key in kt xmute pm sdo po dtmf osc. tdb rd td hi-impedance lnb=2,3 td titp titp tsdo
em91210 series tone/pulse switchable dialer with lcd interface 12 * this specification are subject to be changed without notice. 10.1.1997 figure 6. pulse to tone (p ? t) operating timing figure 5. pause key operating timing tidp tidp tp 2 rd/p 3 hks key in kt xmute pm sdo po dtmf osc. hi-impedance tpt po hks key in kt xmute pm sdo dtmf osc. 2 */t 34 hi-impedance hks key in kt xmute pm sdo po dtmf osc. tdb tf tfp=300ms hi-impedance f figure 7. flash key operating timing
em91210 series tone/pulse switchable dialer with lcd interface 13 * this specification are subject to be changed without notice. 10.1.1997 figure 8. sdo operating timing l=lsb,m=msb, st=start bit time, spt=stop bit time hf hf hf hf hf hf hf hks key in hfo xmute sdo pm po dtmf hi-impedance hks key in kt sdo tdb 2 st st b0 b1 b2 b3 b4 b5 spt spt 0 1 0 1 0000 0 1 tbit l m hi-impedance figure 9. hf operating timing
em91210 series tone/pulse switchable dialer with lcd interface 14 * this specification are subject to be changed without notice. 10.1.1997 application circuit handset handfree 5 4 6 sw1b bridge tip onhook offhook 2 1 3 sw1a 1 2 3 q6 a92 r47 220k r54 10m r48 100k 1 2 d6 1n4148 1 2 d7 1n4148 r49 2k7 r52 220k c16 .001u r36 470k r33 1k5 1 2 3 q18 1815 hook hfo r55 470k em32100 jp9 1 2 3 q14 c945 1 2 d16 1n4148 1 2 d17 1n4148 r56 47k ce c17 .01u 1 2 3 q19 1815 r67 50 c24 .1u c31 220uf d13 5v1 1 2 3 q4 c945 r37 100k c25 .1u r35 2k2 2 1 3 q7 a42 1 2 d14 1n4148 r69 47k ring r68 100k 1 2 d5 1n4148 r43 47k audio power amplifer ce jumper 560k 560k 560k 560k 1 4 7 */t 2 5 8 0 3 6 9 # save f a rd/p (p ? t) st jumper jumper vdd 560k jumper jumper vdd 560k em91210ck sdo lcd driver vcc pm 1.5v 2 to 4 line speech network 3.58mhz 560k 560k buzzer 10p 10p hf 22 21 20 19 18 17 16 15 14 13 12 1 2 3 4 5 6 7 8 9 10 11 sdo pm po row4 row3 row2 row1 hks vdd dtmf hfo nc col5 col4/kt col3 col2 col1 xin xout xmute vss hfi
em91210 series tone/pulse switchable dialer with lcd interface 15 * this specification are subject to be changed without notice. 10.1.1997 em32100 application circuit : package type : qfp 48 pins or chip form provided 1 2 3 4 5 6 7 8 9 10 11 12 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 37 38 39 40 41 42 43 44 45 46 47 48 seg5 seg4 seg3 seg2 seg1 com1 com2 com3 test2 test1 f32h nc seg17 seg18 seg19 seg20 seg21 seg22 seg23 seg24 v ee vn vp nc seg6 seg7 seg8 seg9 nc seg10 seg11 seg12 seg13 seg14 seg15 seg16 ms1 ms2 sd1 hks v dd xin nc xout v ss 24/12 enrtc nc .1 .1 em32100 v cc 8/10 digits lcd pannel 1.5v 32768hz 1 100k 200k 100k 20p 20p 3 1 3 1 1 1 2 2 2 3 1 2 2 2 c945 220k 220k 47k diode diode diode c945 v dd hks hdo hfo v ss sdo
em91210 series tone/pulse switchable dialer with lcd interface 16 * this specification are subject to be changed without notice. 10.1.1997 em32116 application circuit : package type : qfp 64 pins or chip form provided 24/12 enrtc enclnd com3 com2 com1 seg31 seg30 seg29 seg28 seg27 seg26 test2 batckof batlow seg0 seg1 seg2 seg3 seg4 seg5 srg6 seg7 seg8 seg9 com3 com2 com1 seg31 seg30 seg29 seg28 seg27 seg26 seg25 seg24 seg23 seg22 seg21 seg20 seg19 seg18 seg17 seg16 seg15 seg14 seg13 seg12 seg11 seg10 seg9 seg8 seg7 seg6 seg5 seg4 seg3 seg2 seg1 seg0 seg25 seg24 seg23 seg22 seg21 seg20 seg19 seg18 seg17 seg16 seg15 seg14 seg13 seg12 seg11 seg10 xout xin vss vc2 vc1 v3 v2 v dd hks sdi ms2 ms1 f32hz test1 em32116 v dd 1.5v v dd 1 2 3 on off calendar 1 2 3 on off rtc 1 2 3 on off hour 20p 20p 32768kz .1? .1? .1? .1? 1 3 2 sw hook 100k 3 .1 1 2 c945 470k v dd line hook switch detection circuit sdi lcd110
em91210 series tone/pulse switchable dialer with lcd interface 17 * this specification are subject to be changed without notice. 10.1.1997 example : em 91210 p (1) (2) (3) (1) elan micro. pefix (2) type number (3) package code: p ? pdip k ? skinny r ? sdip 18 pdip milimeters inches dim min. max. min. max. a - 5.334 - .210 a1 0.381 - .015 - b 0.356 0.558 .014 .022 b1 1.150 1.778 .045 .070 c 0.204 0.381 .008 .015 d 22.35 23.37 .880 .920 e 7.620 8.255 .300 .325 e1 6.096 7.112 .240 .280 e 2.286 2.794 .090 .110 eb - 10.92 - .430 l 2.921 4.064 .115 .160 20 pdip milimeters inches dim min. max. min. max. a - 5.334 - .210 a1 0.381 - .015 - b 0.356 0.558 .014 .022 b1 1.150 1.778 .045 .070 c 0.204 0.381 .008 .015 d 25.40 26.67 1.000 1.050 e 7.620 8.255 .300 .325 e1 6.096 7.112 .240 .280 e 2.286 2.794 .090 .110 eb - 10.92 - .430 l 2.921 4.064 .115 .160 28 pdip milimeters inches dim min. max. min. max. a - 6.350 - .250 a1 0.381 - .015 - b 0.356 0.558 .014 .022 b1 1.016 1.778 .040 .070 c 0.204 0.381 .008 .015 d 35.56 37.85 1.400 1.490 e 15.24 15.88 .600 .625 e1 13.21 14.73 .520 .580 e 2.286 2.794 .090 .110 eb - 17.78 - .700 l 2.921 5.080 .115 .200 package information b c eb d e1 b1 a1 e l a e 1 18/20/28 lead plastic package
em91210 series tone/pulse switchable dialer with lcd interface 18 * this specification are subject to be changed without notice. 10.1.1997 22/24 lead plastic package-skinny 22 pdip (skinny) milimeters inches dim min. max. min. max. a - 4.752 - .180 a1 0.381 - .015 - b 0.356 0.558 .014 .022 b1 1.27 1.778 .050 .070 c 0.204 3.556 .008 .014 d 25.90 26.67 1.02 1.05 e 7.620 8.255 .300 .325 e1 6.223 6.604 .245 .260 e 2.286 2.794 .090 .110 eb 8.382 10.16 .330 .400 l 2.921 4.064 .115 .160 24 pdip (skinny) milimeters inches dim min. max. min. max. a - 4.572 - .180 a1 0.381 - .015 - b 0.356 0.558 .014 .022 b1 1.27 1.778 .050 .070 c 0.204 0.381 .008 .015 d 31.24 32.26 1.23 1.270 e 7.620 8.255 .300 .325 e1 6.223 6.731 .245 .265 e 2.286 2.794 .090 .110 eb 8.636 9.652 .340 .380 l 2.921 4.064 .115 .160 b c eb d e1 b1 a1 e l a e 1
em91210 series tone/pulse switchable dialer with lcd interface 19 * this specification are subject to be changed without notice. 10.1.1997 42 sdip package b d1 c eb d b1 a1 e l a a2 e e1 42 sdip milimeters inches dim min. max. min. max. a - 5.08 - 0.200 a1 0.381 - 0.015 - a2 3.937 4.191 0.155 0.165 b 0.356 0.559 0.014 0.022 b1 0.914 1.116 0.036 0.044 c 0.204 0.304 0.008 0.012 d 36.70 37.34 1.445 1.470 e1 13.84 14.10 0.545 0.555 e 1.727 1.829 0.068 0.072 eb 15.24 17.78 0.600 0.70 d1 0 0.127 0 0.005 l 2.921 3.429 0.115 0.135

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