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ht9320 series 22-memory tone/pulse dialer rev. 1.10 1 october 1, 2002 features universal specification operating voltag0e: 2.0v~5.5v low standby current lowmemoryretentioncurrent:0.1 a(typ.) tone/pulse switchable interface with lcd driver 32 digits for redialing 32 digits for the sa memory dialing one-key redialing pause and p t key for pbx 3.58mhz crystal or ceramic resonator hand-free control hold-line control pause, p t can be saved for redialing on-hook store function keytone function lock function resistor options m/b ratio flash function and flash time pause and p t duration pulse number inter-digit pause time for 10pps memory number: 22 memories ht9320a/b/h/k/l-x: 28-pin dip package ht9320c: 22-pin skdip package general description the ht9320 series tone/pulse dialers are cmos lsi for telecommunication systems. they are designed to meet various dialing specifications through resistor option matrix. the ht9320 series are offered in six different versions. the different functions of the six versions are listed in the selection table. the ht9320a, ht9320h versions provide the on-hook store function; the ht9320b ver- sion provides the lcd interface function; the ht9320k version provides the keytone function; the ht9320l ver- sion provides both the lcd interface function and idd lock function. the six versions also supply the hold-line and hand-free functions, which are suitable for feature phone applications. ht9320 series provide sa, redial and 20 one-touch/two-touch memory dialing. if the keyboard in- cludes m1~m20 keys it can be used as one-touch mem- ory dialing. otherwise, it works as two-touch (page m1~m10) or three-touch(a page 0~9) memory dialing for speed dialing in either pulse or tone mode. patent number: 64097, 86474, 113235(r.o.c.), 5424740(u.s.a.)
selection table function memory dialing hold- line hand- free lcd interface flash function flash time (ms) pulse no. tone dura - tion (ms) inter- tone- pause (ms) m/b pin idd lock key- tone output on- hook store package part no. ht9320a sa, r m1~m20 control 600 n, n+1 10 n 82.5 85.5 28 dip digit 600/300/98 ht9320b sa, r m1~m20 control 600 n, n+1 10 n 82.5 85.5 28 dip digit 600/300/98 ht9320c sa, r m1~m20 control 600 n, n+1 10 n 82.5 85.5 22skdip digit 600/300/98 ht9320h sa, r m1~m20 digit 600/100 n 82.5 85.5 28 dip ht9320k sa, r m1~m20 control 600 n, n+1 10 n 82.5 85.5 28 dip digit 600/300/98 ht9320l sa, r m1~m20 control 600 n, n+1 10 n 82.5 85.5 28 dip digit 600/300/98 HT9320L-X the same as ht9320l, but the voltage polarity of the row group and the column group are reversed. block diagram ht9320 series rev. 1.10 2 october 1, 2002

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pin assignment keyboard information ht9320a/b/c/k/l ht9320h ht9320 series rev. 1.10 3 october 1, 2002 * , * . * / * - * 0 * 1 * * * * 2 3 , . / - * 1 0 - / . , 3 2 * 1 0 . / - 0 1 * ) + ( ( 4 * , * . * / * - * 0 * 1 * * * * 2 3 , . / - * 1 0 - / . , 3 2 * 1 0 . / - 0 1 * ) + ( ( 4 , + ( * 1 0 -

) ) * 4 * , * . * / * - * 0 * 1 * * * * 2 3 , . / - * 1 0 - / . , 3 2 * 1 0 . / - 0 1 * ) + ( ( 4 ,
( * 1 0 -
5 ) ) * 4 , ( * 1 0 -
) ) * 4 * * * * 2 3 , . / - 0 1 * * 1 0 - / . , 3 2 , * 1 0 -
) ) * 4 . / - 0 1 * ) + ( ( 4

* 1 0 - / * 1 0 - * 1 0 - . , / * 1 0 - 6 ' # ! % ( 6 ' # ! % ( ' 6 ' # ! % * 1 0 - * 1 0 * - , 2 / . , 3 * 2 / . , 3 2 * 1 0 - * 1 0 - 1 / 3 7 0 . 8 ( / . , 3 2 / . , 3 * 2 * 1 0 - * 1 0 - * - , 2 $ 1 / 3 7 0 . 8 ( ( ( ( * - , 2 $ 1 / 3 7 0 . 8 ( * 1 0 - / * 1 0 - * 1 0 - . , / * 1 0 - 6 ' # ! % ( 6 ' # ! % ( ' 6 ' # ! % * 1 0 - * 1 0 * - , 2 / . , 3 * 2 / . , 3 2 * 1 0 - * 1 0 - 1 / 3 7 0 . / . , 3 2 / . , 3 * 2 * 1 0 - * 1 0 - * - , 2 $ 1 / 3 7 0 . ( ( * - , 2 $ 1 / 3 7 0 . 8 ( ( ( (
memory dialing vs. keyboard form table dialing output one-touch memory keyboard two-touch memory keyboard three-touch memory keyboard m1~m10 m1 ~ m10 a a (a=1~9, 0) m11~m20 m11 ~ m20 page ma (ma=m1~m10) a page a (a=1~9, 0) pin description pin name i/o internal connection description c1 ~c8 r1 ~r5 i/o cmos in/out these pins form a 5 8 keyboard matrix which can perform keyboard input de - tection and dialing specification setting functions. when on-hook (hks =high) all the pins are set high. while off-hook the column group (c1 ~c8 ) remains low and the row group (r1 ~r5 ) is set high for key input detection. for the HT9320L-X, the column group remains high and the row group is set low for key input detection. an inexpensive single contact 5 8 keyboard can be used as an input device. pressing a key connects a single column to a single row, and actuates the sys - tem oscillator that results in a dialing signal output. if more than two keys are pressed at the same time, no response occurs. the key-in debounce time is 20ms. refer to the keyboard information for keyboard arrangement and to the functional description for dialing specification selection. x1 i oscillator the system oscillator consists of an inverter, a bias resistor and the necessary load capacitor on chip. connecting a standard 3.579545mhz crystal or ce - ramic resonator to the x1 and x2 terminals can implement the oscillator func - tion. the oscillator is turned off in the standby mode, and is actuated whenever a keyboard entry is detected. x2 o xmute o nmos out xmute is an nmos open drain structure pulled to vss during dialing signal transmission. otherwise, it is an open circuit. xmute is used to mute the speech circuit when transmitting the dial signal. hks i cmos in this pin is used to monitor the status of the hook-switch and its combination with hfi/hdi can control the po pin output to make or break the line. hks =vdd: on-hook state (po =low). except for hfi/hdi (hand-free/hold-line control input), other functions are all disabled. hks=vss: off-hook state (po =high). the chip is in the stand-by mode and ready to receive the key input. po o cmos out this pin is a cmos output structure which by receiving the hks and hfo/hdo signals, control the dialer to connect or disconnect the telephone line. po outputs a low to break line when hks is high (on-hook) and hfo/hdo is low. po outputs a high to make line when hks is low (off-hook) or hfo is high or hdo is high. during the off-hook state, this pin also outputs the dialing pulse train in pulse mode dialing. while in the tone mode, this pin is always high. mode i/o cmos in/out this is a three-state input/output pin, used for dialing mode selection, either tone mode or pulse mode, 10pps/20pps mode=vdd: pulse mode, 10pps mode=open: pulse mode, 20pps mode=vss: tone mode during the pulse mode dialing, switching this pin to the tone mode changes the subsequent digit entry to the tone mode. when the chips are in tone mode, switching to the pulse mode will also be recognized. dtmf o cmos out this pin is active only when the chip transmits tone dialing signals. otherwise, it always outputs a low. the pin outputs tone signals to drive the external transmitter amplifier circuit. the load resistor should not be less than 5k . ht9320 series rev. 1.10 4 october 1, 2002
pin name i/o internal connection description hdi i cmos in pull-high this pin is a schmitt trigger input structure. active low. applying a negative going pulse to this pin can toggle the hdo output once. an external rc network is recommended for input debouncing. the pull-high resistance is 200k typ. hdo o cmos out the hdo is a cmos output structure. its output is toggle- controlled by a nega - tive transition on hdi . when hdo is toggled high, po keeps high to hold the line. the hold function can be released by setting hfo high or by an on-off hook oper - ation or by another hdi input. refer to the functional description for the hold-line function. hfi i cmos in pull-low this pin is a schmitt trigger input structure. active high. applying a positive go - ing pulse to hfi can toggle the hfo once and hence control the hand-free function. an external rc network is recommended for input debouncing. the pull-low resistance of hfi is 200k typ. hfo o cmos out the hfo is a cmos output structure. its output is toggle- controlled by a posi - tive transition on the hfi pin. when hfo is high, the hand-free function is en - abled and po outputs a high to connect the line. the hand-free function can be released by an on-off-hook operation or by another hfi input or by setting hdo high. refer to the functional description for the hand-free function operation. dout o nmos out nmos open drain output pin. it outputs the bcd code of the dialing digits to the lcd driver chip (ht16xx series) or mcu for dialing number display. refer to the functional description for the detailed timing. clock o nmos out nmos open drain output. when dialing, it outputs a series of pulse trains for dout data synchronization. dout data is valid at the falling edge of clock. vdd positive power supply, 2.0v~5.5v for normal operation vss negative power supply, ground hst i cmos in pull-low (ht9320a) on-hook store enable input hst=vdd: on-hook store (ht9320a/h) hst=floating: off-hook store (ht9320a) hst=vss: off-hook store (ht9320h) the pull-low resistance is 200k typ. cmos in (ht9320h) m/b i cmos in pull-high (ht9320a) make/break ratio selection m/b =vss: 33.3/66.6 (ht9320a) m/b =floating: 40/60 (ht9320a) m/b =vdd: 33.3/66.6 (ht9320h) m/b =vss: 40/60 (ht9320h) the pull-high resistance is 200k typ. cmos in (ht9320h) kt o cmos out keytone output pin. outputs a 1.2khz tone carrier for 34ms each time a key is pressed in the pulse mode. ht9320 series rev. 1.10 5 october 1, 2002
approximate internal connection circuits absolute maximum ratings supply voltage ........................................... 0.3v to 6v storage temperature ........................... 50 cto125 c input voltage .............................. v ss 0.3 to v dd +0.3v operating temperature .......................... 20 cto75 c note: these are stress ratings only. stresses exceeding the range specified under
absolute maximum ratings
may cause substantial damage to the device. functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil- ity. electrical characteristics f osc =3.5795mhz, ta=25 c symbol parameter test conditions min. typ. max. unit v dd conditions v dd operating voltage 2 5.5 v i dd operating current 2.5v pulse off-hook, keypad entry, no load 0.2 1 ma tone 0.6 2 ma i stb standby current 1v on-hook, no load no entry 1 a v r memory retention voltage 1 5.5 v i r memory retention current 1v on-hook 0.1 0.2 a v il input low voltage v ss 0.2v dd v v ih input high voltage 0.8v dd v dd v i xmo xmute leakage current v xmute =12v no entry 1 a i olxm xmute sink current 2.5v v xmute =0.5v 1 ma i hks hks pin input current 2.5v v hks =2.5v 0.1 a r hfi hfi pull-low resistance 2.5v v hfi =2.5v 200 k r hdi hdi pull-high resistance 2.5v v hdi =0v 200 k r m/b m/b pull-high resistance 2.5v v m/b =0v 200 k ht9320 series rev. 1.10 6 october 1, 2002 5 + ( 5 + ( + ( 5 6 5 6 ' 9 ' 5 ( ) ) * 5 2 * 2 : 2 : 4 4
symbol parameter test conditions min. typ. max. unit v dd conditions r hst hst pull-low resistance 2.5v v hst =2.5v 200 k i oh1 keypad pin source current 2.5v v oh =0v 4 40 a i ol1 keypad pin sink current 2.5v v ol =2.5v 200 400 a i oh2 hfo pin source current 2.5v v oh =2v 1 ma i ol2 hfo pin sink current 2.5v v ol =0.5v 1 ma i oh3 hdo pin source current 2.5v v oh =2v 1 ma i ol3 hdo pin sink current 2.5v v ol =0.5v 1 ma i oh4 kt pin source current 2.5v v oh =2v 1 ma i ol4 kt pin sink current 2.5v v ol =0.5v 1 ma t fp pause time after flash control key 0.2 s digit key 1 s t rp pause time for one-key redialing one-key redialing 1 s t db key-in debounce time 20 ms t brk break time for one-key redialing one-key redialing 1.2 s f osc system frequency crystal=3.5795mhz 3.5759 3.5795 3.5831 mhz pulse mode electrical characteristics f osc =3.5795mhz, ta=25 c symbol parameter test conditions min. typ. max. unit v dd conditions i poh po output source current 2.5v v oh =2v 0.2 ma i pol po output sink current 2.5v v ol =0.5v 0.2 0.6 ma pr pulse rate mode pin is connected to v dd 10 pps mode pin is opened 20 m/b make/break ratio a resistor is linked between r2 and c1 (ht9320b/c/k/l) 33:66 % m/b =vss (ht9320a) m/b =vdd (ht9320h) no resistor is linked between r2 and c1 (ht9320b/c/k/l) 40:60 m/b =floating (ht9320a) m/b =vss (ht9320h) t pdp pre-digit-pause time m/b ratio=40:60 40 (10pps) 20 (20pps) ms m/b ratio=33:66 33 (10pps) 17 (20pps) ht9320 series rev. 1.10 7 october 1, 2002
symbol parameter test conditions min. typ. max. unit v dd conditions t idp inter-digit-pause time pulse rate=10pps. no resistor is linked between r1 and c5 (ht9320a/b/c/k) 800 ms pulse rate=10pps (ht9320h/l) pulse rate=10pps. a resistor is linked between r1 and c5 (ht9320a/b/c/k) 400 pulse rate=20pps 500 t m pulse make duration a resistor is linked between r2 and c1 (ht9320b/c/k/l) 33 (10pps) 17 (20pps) ms m/b =vss (ht9320a) m/b =vdd (ht9320h) no resistor is linked between r2 and c1 (ht9320b/c/k/l) 40 (10pps) 20 (20pps) m/b =floating (ht9320a) m/b =vss (ht9320h) t b pulse break duration a resistor is linked between r2 and c1 (ht9320b/c/k/l) 66 (10pps) 33 (20pps) ms m/b =vss (ht9320a) m/b =vdd (ht9320h) no resistor is linked between r2 and c1 (ht9320b/c/k/l) 60 (10pps) 30 (20pps) m/b =floating (ht9320a) m/b =vss (ht9320h) t kt keytone duration pulse mode (ht9320k) 34 ms f ktc keytone carrier pulse mode (ht9320k) 1.2 khz tone mode electrical characteristics f osc =3.5795mhz, ta=25 c symbol parameter test conditions min. typ. max. unit v dd conditions v tdc dtmf output dc level 0.45v dd 0.7v dd v i tol dtmf sink current 2.5v v dtmf =0.5v 0.1 ma v tac dtmf output ac level row group, r l =5k 0.12 0.155 0.18 vrms r l dtmf output load 2.5v thd 23db 5 k a cr column pre-emphasis 2.5v row group=0db 1 2 3 db thd tone signal distortion 2.5v r l =5k 30 23 db t tmin minimum tone duration auto-redial 82.5 ms t itpm minimum inter-tone pause auto-redial 85.5 ms thd (distortion) (db) = 20 log ( v1 v2 vn / vi vh 22 222 ) vi, vh: row group and column group signals v1, v2, ... vn: harmonic signals (bw=300hz~3500hz) ht9320 series rev. 1.10 8 october 1, 2002
ht9320 series rev. 1.10 9 october 1, 2002 functional description keyboard matrix c1 ~c8 and r1 ~r5 form a keyboard matrix. together with a standard 5 8 keyboard, the keyboard matrix is used for dialing entries. in addition, the keyboard matrix also provides resistor options for different dialing specifi - cation selections. the keyboard arrangement for the ht9320 series are shown in the keyboard informa - tion . tone frequency tone name output frequency (hz) % error specified actual r2 697 699 +0.29% r3 770 766 0.52% r4 852 847 0.59% r5 941 948 +0.74% c1 1209 1215 +0.50% c2 1336 1332 0.30% c3 1477 1472 0.34% note: % error does not contain the crystal frequency drift dialing specification selection various dialing specifications can be selected by adding resistors across keyboard matrix pins. the allowable option resistor connections are shown on the table. all the resistors are 330k . the resistor option functions and the default specifications (without option resistors) are listed below (ht9320a/b/c/k/l). option resistor option function default (no resistor) r k12 (ht9320b/c/k/l) ratio selection 40:60 r k13 flash function/ time selection flash=control function flash time=600ms r k14 r k21 pause & p t duration selection t p = 3.6s t p t = 3.6s r k31 pulse number selection n r k41 r k51 (ht9320a /b/c/k) inter-digit- pause time for 10pps 800ms r k51 r k61 r k71 (ht9320l) international direct dialing lock selection normal dialing (unlock) m/b ratio selection table ht9320a m/b pin m/b ratio (%) vss 33.3:66.6 floating 40:60 ht9320b/c/k/l r k12 m/b ratio (%) no 40:60 yes 33.3:66.6 ht9320h m/b pin m/b ratio (%) vdd 33.3:66.6 vss 40:60 * 1 0
* * 1 0 - / .
1
0
-
/
.
*
1
0
ht9320 series rev. 1.10 10 october 1, 2002 flash function/time (duration) selection table ht9320a/b/c/k/l r k13 r k14 flash function flash time (t f ) no no control 600ms no yes digit 600ms yes no digit 98ms yes yes digit 300ms ht9320h m/b pin flash function flash time (t f ) vss digit 600ms vdd digit 100ms pause and p t duration selection table ht9320a/b/c/k/l r k21 t p (sec) t p t (sec) no 3.6 3.6 yes 2 1 ht9320h t p (sec) t p t (sec) 3.6 3.6 pulse number selection table ht9320a/b/c/k/l r k31 r k41 pulse number no no n no yes n+1 yes no 10-n yes yes ht9320h pulse number n inter-digit-pause time for 10pps ht9320a/b/c/k r k51 inter-digit pause time no 800ms yes 400ms ht9320h/l inter-digit pause time 800ms pulse number table keypad output pulse number digit key n 10 n n+1 1192 2283 3374 4465 5556 6647 7738 8829 99110 010101 /t p tp tp t # ignored ignored ignored dout bcd code when dialing, the corresponding 4-bit bcd codes are serially presented on dout from msb to lsb. the data of dout is valid at the falling edge of the clock pin. the following table lists the bcd codes corresponding to the keyboard input. key-in bcd code key-in bcd code 1 0001 8 1000 2 0010 9 1001 3 0011 0 1010 4 0100 /t 1101 5 0101 # 1100 6 0110 f 1011 7 0111 p 1110 on hook store (ht9320a/h) when the external power supply (2v~5.5v) is used and the hst pin is connected to vdd, the user can store di - aling numbers to the memories (m1~m20) during on-hook state. on/off hook store selection table hst pin hook store mode vdd (ht9320a/h) on-hook store floating (ht9320a) off-hook store vss (ht9320h) off-hook store
ht9320 series rev. 1.10 11 october 1, 2002 lock function (ht932l) this function aims to detect lock dialing numbers to pre - vent from an unauthorized long distance call. the dialing output of this chip is disabled if the first input key after on-off hook is the lock number when the lock function is enabled. international direct dialing lock (idd lock) selection table r k51 r k61 r k71 lock function no no no normal dialing without lock function no no yes to lock 0 no yes to lock 0, 9 yes idd lock operation by the tele - phone keyboard. (see keyboard operation) note:

stands for
don t care
hand-free function operation hand-free function execution when hfo is low, a rising edge triggers the hfi, en - abling the hand-free function (hfo becomes high). reset hand-free function when hfo is high, the hand-free function is enabled and can be reset by: off-hook applying a rising edge to hfi changing the hdo pin from low to high hand-free function table hold-line function operation hold-line function execution when hdo is low, a falling edge triggers the hdi ,en - abling the hold-line function (hdo becomes high). the xmute remains low when hdo is high. reset hold-line function when hdo is high, the hold-line function is enabled and can be reset by: off-hook applying a falling edge to hdi changing the hfo pin from low to high hold-line function table key definition 0,1,2,3,4,5,6,7,8,9 keys these are dialing number input keys for both the pulse mode and the tone mode operations. /t this key executes the p t function and wait a t p t duration in the pulse mode. on the other hand, the /t key executes the function in the tone mode. (ht9320h) the key executes the tone output function in the tone mode. no response in the pulse mode. p t the key executes the p t function in the pulse mode. no response in the tone mode. # this is a dialing signal key for the tone mode only, no response in the pulse mode. ) ) ) ) ) ) ) ) ) ) ; ; 9 $ 9 ) ; ; < % + ' % 9 ; ; & 9 9 % 9 9 ) ) ) ) ) ) ) ) ) ) ; ; 9 $ 9 ) ; ; < % + ' % 9 ; ; & 9 9 % 9 9
ht9320 series rev. 1.10 12 october 1, 2002 sa pressing this key can save the preceding dialing tele - phone numbers. the saved number is redialed if it is pressed again. sa will also redial the saved number if it is the first key pressed at the off-hook state. during the dialing signal transmission, the sa key is inhibited. f the flash key can be selected as a digit or as a control key by the option resistors r k13 &r k14. pressing the flash key will force the po pin to be
low
for the t f dura - tion and is then followed by t fp (sec). t f can also be se - lected by r k13 ,r k14 . p pause key. the execution of this key can pause the output for the t p duration. t p can be selected by r k21 . r redial key. executes redialing as well as one-key re - dial function. r/p redial and pause function key. if it is pressed as the first key after off-hook, this key executes the redial function. otherwise, it works as the pause key. st store key. the execution of this key actuates the store memory function with (or without) dialing output. dur - ing the dialing signal transmission, the st key is inhib - ited. a auto key. when this key is pressed before pressing any one of the digital keys (0~9) it executes the two-touch/ three-touch memory dialing function. page m11~m20 are represented by pressing the page key and the digital keys (0~9) or m1~m10. that is to say, a page digit key (0~9) or page m1~m10 exe - cutesm11~m20memorydialing. m1~m20 one-touch memory dialing for speed-dialing in either pulse or tone mode.
keyboard operation the following operations are described under an on-off-hook or on-hook condition with the hand-free active condition. ht9320 series rev. 1.10 13 october 1, 2002 & = % > ' 8 ( % 9 : ; * ? ? ? ; * ? ? ? ; + ' % 9 = ! > ' 8 ( % 9 : ; * ? ? ? ( ( @ ? ? ? ; * ? ? ? 8 ( @ ? ? ? ; + ' % 9 ( &
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ht9320 series rev. 1.10 14 october 1, 2002
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ht9320 series rev. 1.10 15 october 1, 2002 = % > ' 8 ( % 9 : ; * ? ? ? ; + ' % 9 ; + ' % 9 = ! > ' 8 ( ; + ' % 9 ; + ' % 9 = % > ' 8 ( % 9 : ; * ? ? ? ; + ' % 9 ; + ' % 9 = ! > ' 8 ( % 9 : ; * ? ? ? 8 @ ? ? ? ; + ' % 9 ; + ' % 9 ; * ? ? ? ; * ? ? ? 8 ( @ ? ? ? ; * ? ? ? ; * ? ? ? 8 @ ? ? ? & ( % 9 : ; * ? ? ? ( ( @ ? ? ? ( & % 9
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! % : ; ( * ? ? ? ( % % 9 : ; * ? ? ? % ; * ? ? ? = % f ! @ 2 a 2 f 2 > ; * ? ? ? ( ' 6 ' & ' % 9 : = h * 2 > ; + ' % 9 ( 6 ' & ' % 9 : = h 2 > 5 ; c ' % 9 ! b & 1 * 9 & a ' & & ' ! ? " a c ' % 9 ! & ' % 1 * 9 & ' & % % b ? c / 9 & ? % f h * 2 a ! f h 2 a % f h * 2 a ! f h 3 a 2 % ; * ? ? ? = % f ! @ 2 a 2 f 2 >
! % : ; ( * ? ? ? ( d ! ! e
! % : ; ( * ? ? ? ( $ d ! ! e = h * 2 > ( 6 ' & ' % 9 : = h 2 > % ; * ? ? ? = % f ! @ 2 a 2 f 2 > d ! ! e $ d ! ! e = h * 2 >
! % : ; ( * ? ? ? ( $ d ! ! e $ d ! ! e
! % : ; * ? ? ? ( (
! % : ; * ? ? ? ( (
! % : ; * ? ? ? ( (
ht9320 series rev. 1.10 16 october 1, 2002 ; * ? ? ? ; + ' % 9 % & ' % & % 9 % #
! % : ; * ? ? ? @ ? ? ? % 9 : ; * 1 * ? ? ? @ ? ? ? * ; + ' % 9 ; * 1 * ? ? ? @ ? ? ? * ; @ ? ? ? ; * ? ? ? ; + ' % 9
! % : ; * 1 d e d * * e % 9 : ; * ? ? ? % ; + ' % 9 ; * ? ? ? 6 ' % 9 = h * 2 > ; + ' % 9 % ; * ? ? ?
! % : ; % % 9 : ; * ? ? ? ! ; + ' % 9 ; * ? ? ? ( 6 ' % 9 = h 2 > ; + ' % 9 ! ; * ? ? ?
! % : ; d ! ! e % 9 : ; * ? ? ? % ; + ' % 9 = % f ! @ 2 a 2 f 2 > ; * ? ? ? ( ' 6 ' % 9 = h * 2 > ; + ' % 9 ; * ? ? ?
! % : ; $ d ! ! e % & ' % & % # = % > ( ' " # ; + ' % 9 ; + ' % 9 % 9 : ; ( ( *
! % : ; * ? ? ? = ! > ( ' c & # % & ' ' % % 9 % 9 % 9 : ; * ? ? ? ( ( @ ? ? ? ; @ ? ? ? ; + ' % 9
! % : ; * ? ? ? @ ? ? ? % 9 : ; * ? ? ? ( ( @ ? ? ? 5 ; ( ; ! % # % c % & ' 5 ; % f h * 2 a % f h * 2 ! f h 2 a ! f h 3 a 2 5 ; c ' % 9 ! b & 1 * 9 & a % 9 & ' ! % f 4
ht9320 series rev. 1.10 17 october 1, 2002 h * f 2 h 3 @ @ * f 2 h 3 ? ? ? f 2 h 3 a 8 a 7 5 ; ; % ; % " % 9 * ? ? ? ; 2 h 3 @ ? ? ? ; 2 h 3 a 8 a 7 @ ? ? ? ; 2 h 3 a 8 a 7 @ ? ? ?
; 2 h 3 a 8 a 7 5 ; & % # 5 ? # 5 ? * : : % & & % ; ( * 1 ( 8 2 & # 5 ? ; ( 0 - / ( 8 & # 5 ? * ; ( . , 3 ( 8 * ' % 9 & & % ; ( * 1 ( 7 ( 0 - / ( 8 2 = : & % > = 5 : & % > ' % 9 & # 5 ? ; ( * 1 ( 7 ( 0 - / ( 8 = & % > = # 5 ? > ' % 9 & # 5 ? * ; ( * 1 ( 7 ( . , 3 ( 8 * = # 5 ? * > ' % 9 & & % a # 5 ? % # 5 ? * % = & % > ( * 1 ( 7 ( 0 - / ( 8 2 = > = : & % > = 5 : & % > = # 5 ? > = # 5 ? * > & % # 5 ? # 5 ? * % : % ( . , 3 ( 8 ( 2 * ( 8 * % & & % ; ( * 1 ( 7 ( 7 2 % & # 5 ? ; ( * 1 ( 7 ( 7 % & # 5 ? * ; ( * 1 ( 7 ( 7 * ( : % % & ! ' c ' # ! & = # 5 ? a # 5 ? * > ; ( * 1 ( 7 @ @ * ? ? ? = & % > = % > & % & < b & = ! > & % b & # : % ! ' # ! % = * # ! & a 1 9 & ! % % b > = 1 1 2 # & & & ! - % >
timing diagrams normal dialing pulse mode tone mode ht9320 series rev. 1.10 18 october 1, 2002

i 5 ( ( ( ( ( ( 6 ( ( ( 9 ' : % ) + ( * ( ( ( 6 ( ( (
( ) * (
( (
( (
( ( 6 ( ? * # j % * 2 & * 2 & ) * ( 9 ' : % ( ( ( ( ( ( ( 5
i 5 ( ( ( (
( ( ( *
) + ( * 2 & * 2 &
dialing with pause key pulse mode tone mode ht9320 series rev. 1.10 19 october 1, 2002
i 5 ) * ( ( 9 ' : % 1 * ( ( ( @ ( ( 6 ( (
( (
( (
( ( ( ( ? * # j %
) + ( ( * 2 & ) * ( 9 ' : % ( ( (
i 5 1 * ( ( 5 ( ( ( ( (
(
) + ( * 2 &
flash key operation pulse tone operation ht9320 series rev. 1.10 20 october 1, 2002
i 5 ) * ( ( 9 ' : % ( * 2 & (
( (
( ? * # j %
) + (
i 5 ) * ( 9 ' : % ( ( @ ( ( ( 5 ( ( ( ( ( ( * 2 & * 1 8 (
( ( ( (
( ? * # j %
) + (
one key redial operation clock & dout operating ht9320 series rev. 1.10 21 october 1, 2002 ( = & > (
= ? * & & > ( ( ( ( 9 ' : % ( ( ( (
i 5 ) * ( *
( ( ( (
) + ( * 2 & 5 ; f 1 f 1 * f *
f * ? 0 # j % % ( ( ( ( 9 ' : % ) *
+ (
( (
( = 1 0 & > ? * # j %
i 5
) + ( * 2 &
application circuits application circuit 1 ht9320 series rev. 1.10 22 october 1, 2002 * 1 0 -
* . * / * - * 0 * 1 * * 4 ) ) * - 4 2 : : & * 2 : : & ( * 1 1 ? - , j & % 4 - 2 , 0 - ? 4 5 0 0 , 5 0 0 , 5 0 0 , . / * 2 5 0 0 , b 0 / 4 5 0 0 , % c 0 * 2 - 2 4 3 * * * ( : 9 ! 9 # # * - , 2 0 . 8 ( 1 / 3 7 ( $ 2 : 1 0 - / . / - 0 1 * ( 8 # & c ' % 9 & 9 % : = c ' c % & : > 8 + & : c % & & & % c , 2 - 2 : 8 % : % ! ) + ( % 4 = $ 5 > & 3 * ( 5 0 0 , 1 h - 4 1 1 / / 0 2 / 2 6 ' # & c c 6 ' # & / . , 3 2 / . , 3 * 2 * 1 0 - * 1 0 - , * 2 3 ) + ( 5 (
4 1 3 : 1 3 : ? - # 0 . # 2 2 # * . 2 # * * 2 # 2 ? 2 2 * ? * # * * # * * # 2 2 # * * 2 # 2 ? 1 1 2 # * * 2 # 1 1 # 2 # 0 . # 2 2 # 2 ? 2 * 1 ? 1 # 2 2 # c c 6 ' # 6 ' #
application circuit 2 ht9320 series rev. 1.10 23 october 1, 2002 ) + ( * 1 0 -
* . * / * - * 0 * 1 * * 4 ) ) *
- 4 2 : : & * 2 : : & ( * 1 1 ? - , j & % 3 * 4 - 2 , 0 - ? 4 5 0 0 , 5 0 0 , 5 0 0 , . / * 2 5 0 0 , b 0 / 4 5 0 0 , % c 0 * 2 - 2 4 3 * * * ( : 9 ! 9 # # * - , 2 0 . 8 ( 1 / 3 7 ( $ 2 : ! 4 = & ( / ) ) % % > 1 0 - / . 5 0 0 , / - 0 1 * ( + ( 8 # & c ' % 9 & 9 % : = c ' c % & : > 8 + & : c % & & & % c , 2 - 2 : 8 % : % ! ) + ( % 4 = $ 5 > & / . , 3 2 / . , 3 * 2 * 1 0 - * 1 0 - 5 (
, * 2 3 4 1 3 : 1 3 : 0 . # 0 . # ? - # 2 2 # * . 2 # * * 2 # 2 ? 2 2 * ? * # * * # * * # 2 ? 2 2 # * * 2 # 2 # * * 2 # 1 1 2 # 1 1 # 2 2 # 0 . # 2 ? 2 * 1 ? 1 # 2 2 # c c 6 ' # 6 ' #
application circuit 3 ht9320 series rev. 1.10 24 october 1, 2002 ) + ( * 1 0 -
* * 2 3 , . / 4 ) ) * * , 4 2 : : & * 2 : : & ( 3 2 1 ? - , j & % 4 - 2 . - ? 4 5 0 0 , 5 0 0 , - 0 * 3 * * * ( : 9 ! 9 # # * - , 2 0 . 8 ( 1 / 3 7 ( $ 2 : * 1 0 - / / - 0 1 * ( 8 # & c ' % 9 & 9 % : = c ' c % & : > 8 + & : c % & & & % c , 2 - 2 : 8 % : % ! ) + ( % 4 = $ 5 > & / . , 3 2 / . , 3 * 2 * 1 0 - * 1 0 - 5 (
1 0 4 5 0 0 , 1 3 : 1 3 : ? - # 2 2 # * * 2 # * . 2 # 2 ? 2 2 # * ? * # 2 ? 2 2 2 2 # 1 ? 1 # 0 . # c c 6 ' # 6 ' #
application circuit 4 ht9320 series rev. 1.10 25 october 1, 2002 ) + ( * 1 0 -
* . * / * - * 0 * 1 * * 4 ) ) * - 4 2 : : & * 2 : : & ( * 1 1 ? - , j & % 3 * 4 - 2 , 0 - ? 4 5 0 0 , 5 0 0 , 5 0 0 , . / * 2 5 0 0 , b 0 / 4 5 0 0 , % c 0 * 2 - 2 4 3 * * * ( : 9 ! 9 # # * - , 2 0 . 8 1 / 3 7 ( ( $ 2 : 1 0 - / . # c c # / - 0 1 * ( ( 8 # & c ' % 9 & 9 % : = c ' c % & : > 8 + & : c % & & & % c , 2 - 2 : 8 % : % ! ) + ( % 4 = $ 5 > & 5 0 0 , 1 h - 4 0 2 / 2 1 1 / / 6 ' # & c c 6 ' # & , * 2 3 5 (
4 / . , 3 2 / . , 3 * 2 * 1 0 - * 1 0 - 1 3 : 1 3 : ? - # 0 . # 2 2 # * . 2 # * * 2 # * ? * # 2 ? 2 2 * * # * * # 2 ? 2 # 2 2 # * * 2 # 1 1 2 # * * 2 # 2 2 # 1 1 # 0 . # 2 2 # 2 ? 2 * 1 ? 1 #
application circuit 5 ht9320 series rev. 1.10 26 october 1, 2002 ) + ( * 1 0 -
* . * / * - * 0 * 1 * * 4 ) ) * - 4 2 : : & * 2 : : & ( * 1 1 ? - , j & % * 4 - 2 , 0 - ? 4 5 0 0 , 5 0 0 , 5 0 0 , . / * 2 5 0 0 , b 0 / 4 5 0 0 , % c 0 * 2 - 2 4 3 * * * ( : 9 ! 9 # # * - , 2 0 . 8 ( 1 / 3 7 ( $ 2 : 1 0 - / . / - 0 1 * (
( 8 # & c ' % 9 & 9 % : = c ' c % & : > 8 + & : c % & & & % c , 2 - 2 : 8 % : % ! ) + ( % 4 = $ 5 > & j j 5 (
4 / . , 3 2 / . , 3 * 2 * 1 0 - * 1 0 - , * 2 3 1 3 : 1 3 : 2 ? 2 2 ? - # 0 . # 2 2 # * . 2 # * * 2 # * ? * # * * # * * # 2 2 # * * 2 # 2 ? 1 1 2 # 2 # * * 2 # 2 2 # 0 . # 1 1 # 2 ? 2 * 2 2 # 1 ? 1 # c c 6 ' # 6 ' #
package information 28-pin dip (600mil) outline dimensions symbol dimensions in mil min. nom. max. a 1445 1465 b 535 555 c 145 155 d 125 145 e16 20 f50 70 g 100 h 595 615 i 635 670 0 15 ht9320 series rev. 1.10 27 october 1, 2002 0 - * , $
22-pin skdip (300mil) outline dimensions symbol dimensions in mil min. nom. max. a 1085 1105 b 253 263 c 125 135 d 125 145 e16 20 f50 70 g 100 h 295 315 i 330 375 0 15 ht9320 series rev. 1.10 28 october 1, 2002 * * * $
ht9320 series rev. 1.10 29 october 1, 2002 copyright 2002 by holtek semiconductor inc. the information appearing in this data sheet is believed to be accurate at the time of publication. however, holtek as - sumes no responsibility arising from the use of the specifications described. the applications mentioned herein are used solely for the purpose of illustration and holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. holtek s products are not authorized for use as critical components in life support devices or systems. holtek reserves the right to alter its products without prior notification. for the most up-to-date information, please visit our web site at http://www.holtek.com.tw. holtek semiconductor inc. (headquarters) no.3, creation rd. ii, science park, hsinchu, taiwan tel: 886-3-563-1999 fax: 886-3-563-1189 http://www.holtek.com.tw holtek semiconductor inc. (taipei sales office) 4f-2, no. 3-2, yuanqu st., nankang software park, taipei 115, taiwan tel: 886-2-2655-7070 fax: 886-2-2655-7373 fax: 886-2-2655-7383 (international sales hotline) holtek semiconductor inc. (shanghai sales office) 7th floor, building 2, no.889, yi shan rd., shanghai, china 200233 tel: 021-6485-5560 fax: 021-6485-0313 http://www.holtek.com.cn holtek semiconductor inc. (shenzhen sales office) 5/f, unit a, productivity building, cross of science m 3rd road and gaoxin m 2nd road, science park, nanshan district, shenzhen, china 518057 tel: 0755-8616-9908, 8616-9308 fax: 0755-8616-9533 holtek semiconductor inc. (beijing sales office) suite 1721, jinyu tower, a129 west xuan wu men street, xicheng district, beijing, china 100031 tel: 010-6641-0030, 6641-7751, 6641-7752 fax: 010-6641-0125 holtek semiconductor inc. (chengdu sales office) 709, building 3, champagne plaza, no.97 dongda street, chengdu, sichuan, china 610016 tel: 028-6653-6590 fax: 028-6653-6591 holmate semiconductor, inc. (north america sales office) 46729 fremont blvd., fremont, ca 94538 tel: 510-252-9880 fax: 510-252-9885 http://www.holmate.com

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