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HT6220A/ht6221a/ht6222a multi-purpose encoders block diagram rev. 1.00 1 july 27, 2009 features operating voltage: 2.0v~3.6v dout with 38khz carrier for ir medium low standby current minimum transmission word: one word build-in rc (internal rc) oscillator 16-bit address codes 8-bit data codes ppm code method three double-active keys maximum active keys HT6220A: 30 keys ht6221a: 32 keys ht6222a: 64 keys low power and high noise immunity cmos technology HT6220A: 16-pin nsop package ht6221a: 20-pin sop package ht6222a: 24-pin sop package applications television , setup box and dvd player controllers burglar alarm systems smoke and fire alarm systems garage door controllers car door controllers car alarm systems security systems other remote control systems general description the devices are cmos lsi encoders designed for use in remote control systems. they are capable of encod- ing 16-bit address codes and 8-bit data codes. each ad- dress/data input can be set to one of the two logic states, 0 and 1. the HT6220A/ht6221a/ht6222a contain 30keys (k1~k16, k17~k20, k33~k34, k37~k38, k41~k42, k45~k46, k49~k50), 32 keys (k1~k32) and 64 keys (k1~k64), respectively. when one of the keys is trig- gered, the programmed address/data is transmitted to- gether with the header bits via an ir (38khz carrier) transmission medium.

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pin assignment pin description ht6222a pin no. pin name i/o internal connection description 1~6 r3~r8 i cmos in, pull-low row control for keyboard matrix, active high 7 dout o nmos out serial data output pin, with a 38khz carrier 8 vdd positive power supply, 2.0v~3.6v for normal operation 9 d7 i cmos in most significant data bit (d7) code setting 10, 11 nc no connection 12 vss negative power supply, ground 13 led o cmos out transmission enable indicator output 14~21 c8~c1 i/o cmos in/out, pull-low column control for keyboard matrix 22 ain i cmos in, pull-high pull-low low byte address codes (8 bits) scan input 23~24 r1~r2 i cmos in, pull-low row control for keyboard matrix, active high approximate internal connection circuits HT6220A/ht6221a/ht6222a rev. 1.00 2 july 27, 2009 - . / % * 0 1 - - 1 0 * % / . . / % * 0 1 - - 1 0 * % / . ' ( ) - 1 0 * % + , $ $ $ - $ ! " * ) )

$ $ ' ( ) - 1 0 * % + , $ - $ $ 1 $ 0 $ * $ % ! " * ) ) 0 1 - . / - 1 0 * %
$ - $ $ 1 $ 0 ! " * $ $ ' ( ) - 1 ( ) 2 ! " ( ) 3 4 5 ( ) 2 ! " 3 4 5 ( ) ! " ) ! "
absolute maximum ratings supply voltage ..............................v ss 0.3v to v ss +6v storage temperature ............................ 50 cto125 c input voltage..............................v ss 0.3v 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 reliability. electrical characteristic ta=25 c symbol parameter test conditions min. typ. max. unit v dd conditions v dd operating voltage 2.0 3.0 3.6 v i stb standby current 3v oscillator stops 0.1 1.0 a i dd operating current 3v f osc =455khz, no load 600 900 a i ol1 output sink current for dout 3v v o =0.6v 300 350 ma i oh2 output source current for led 3v v o =2.7v 10 60 a i ol2 output sink current for led 3v v o =0.3v 12 ma i oh3 output source current for c1~c8 3v v o =2.7v 0.6 2.0 ma i ol3 output sink current for c1~c8 3v v o =0.3v 10 30 a v ih1 input high voltage for r1~r8 3v 1.9 3.0 v v il1 input low voltage for r1~r8 3v 0 0.8 v v ih2 input high voltage for c1~c8 3v 1.6 3.0 v v il2 input low voltage for c1~c8 3v 0 0.6 v v ih3 input high voltage for ain 3v 1.5 3.0 v v il3 input low voltage for ain 3v 0 0.6 v r ph1 input pull-high resistance for ain 3v v in =0v 100 200 400 k r pl1 input pull-low resistance for ain 3v v in =3v 70 150 250 k r pl2 input pull-low resistance for r1~r8 3v v in =3v 120 200 320 k r pl3 input pull-low resistance for c1~c8 3v v in =3v 300 500 1500 k f osc system frequency 3v ta=25c 450.45 455 459.55 khz 2.0v~ 3.6v 0 cHT6220A/ht6221a/ht6222a rev. 1.00 3 july 27, 2009
HT6220A/ht6221a/ht6222a rev. 1.00 4 july 27, 2009 functional description keyboard scan the devices remain in the halt mode during the standby state (at this time, the oscillator stops, and the standby current<1 a). the HT6220A consists of 30 active keys, ht6221a has 32 active keys, and the ht6222a has 64 active keys. the keyboard forms of the devices are shown below. the HT6220A keyboard form the ht6221a keyboard form the ht6222a keyboard form when one of the keys (30, 32 or 64 keys) is triggered for over 36ms, the oscillator is enabled and the chip is acti - vated. if the key is pressed and held for 108ms or less, the 108ms transmission codes are enabled and comprised of a header code (9ms), an off code (4.5ms), low byte ad - dress codes (9ms~18ms), high byte address codes (9ms~18ms), 8-bit data codes (9ms~18ms), and the in - verse codes of the 8-bit data codes (18ms~9ms). after the pressed key is held for 108ms, if the key is still held down, the transmission codes turn out to be a composition of header (9ms) and off codes (2.24ms) only. to avoid mistakes made by keyboard scanning or simul - taneous two-key inputs (except for the three double-key active functions (k21+k22, k21+k23, and k21+k24), the devices are facilitated with 36ms starting time. the ht6221a/ht6222a also provide three double-key active functions (k21+k22, k21+k23, and k21+k24) for tape deck recording operations. the double-key opera - tion rules are shown in timing 4 and timing 6. transmission codes the transmission codes of the devices consist of a 9ms header code, a 4.5ms off code, 16-bit address codes (18ms~36ms), 9ms~18ms 8-bit data codes, and the in- verse code of the 8-bit data codes. the following is an il- lustration of the transmission codes. $ $ $ - $ $ 1 $ 0 $ * $ % - - - - - 1 - 0 1 0 * % - * - % - / . / . - - 1 0 1 0 * % * % / . / 1 . 1 1 - 1 - 1 1 1 1 0 / - . - - 0 0 0 - 0 1 0 * % 1 * 1 % 1 / 0 . - 1 0 * % - 1 0 * % / . - 1 0 - $ $ $ - $ * % / . - 1 0 * % / - . - - 1 0 * % ! " ( $ 4 6 7 0 8 - 0 9 9 # / 9 1 9 7 0 - 9 . % 9 . % 9 6 ' . 7 ' 1 : . 7 * : . 7 * 8 - % ; < = > - - ?

/ 9 # 9 # 9 / 9 , @ a 1 1 ; < = # 1 9 . # 1 0 9 . # 1 0 9 timing 1. output format for the dout - $ $ $ - $ $ 1 $ 0 - - - - 1 0 * % - * - % / . - 1 0 1 0 1 * % / . / 1 .
HT6220A/ht6221a/ht6222a rev. 1.00 5 july 27, 2009 the output code carrier of the dout pin is shown in timing 2. the transmission codes employ the ppm (pulse position modulation) method to represent their two logic states by 0 (1.12ms) and 1 (2.24ms) as shown in timing 3.

0 # - % # * * - % ; < = timing 2. 38khz carrier setting the address codes (a0~a15) the algorithm rule of the address codes (a0~a15) can be selected by mask option. in this case, the 16-bit on-chip mask rom (rom1 and rom2) are available, and the value of rom1 (8 bits) and rom2 (8 bits) are decided by one mask layer. the current value of rom1 and rom2 are both 00h . the a0~a7 are set by logical or between the external switch s0~s7 and the rom1. the a8~a15 equal some bits inverted to a0~a7, the inver - sion are decided by logical or between the external switch s8~s15 and the rom2. for example: the following is an illustration of these rules in selecting the address codes (a0~a15). b b b c
b d
6 # 9 8 d
6 # 9 8 - % ; < =

- % ; < =

. # 1 0 9 timing 3. logic states ' ( ) % - . / . - 6 5 e d f . > 5 e f 8 9 d 9 f
. f
. 7 $ $ % 7 $ $ . . . . . . ,
5 e . 7 * f 4 e d $ > $ f ' . 7 ' * f ' % g 7 ' 1 g f ' % 7 ' 1 f . * . * . - % / . @ 5 e =
9 ' . ' ' ' - ' ' 1 ' 0 ' * ' . ' ' ' - ' ' 1 ' 0 ' * . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ) % 1 1 . . ; 1
HT6220A/ht6221a/ht6222a rev. 1.00 6 july 27, 2009 9 d 9 f
. f
. 7 * $ $ % 7 1 $ $ . . . . . ,
5 e . 7 1 f 4 e d $ > $ f ' . 7 ' * f ' % g 7 ' 1 g f ' % 7 ' 1 f . * . * . - % / . ' . ' ' ' - ' ' 1 ' 0 ' * ' . ' ' ' - ' ' 1 ' 0 ' * . . . . . . . . . . . . . . . . . . . . . . . . . . ' ( ) ) % % % * 0 1 - . / . - 1 - 1 0 * % 6 5 e d f . > 5 e f 8 . . ; % 1 0 * - 1
HT6220A/ht6221a/ht6222a rev. 1.00 7 july 27, 2009 values of the data codes (d0~d7) the HT6220A/ht6221a/ht6222a contain 30, 32 and 64 active keys, respectively. each key corresponds to a data code. for tape deck recording, the ht6221a/ ht6222a provide three double-key functions. the double-key, single-key, and double-key operation rules are shown in table 3, table 4, timing 4, timing 5 and timing 6. table 3: double-key data code table key data codes d0~d6 data code d7 k21 + k22 1010110 0/1 k21 + k23 0110110 0/1 k21 + k24 1110110 0/1 note: d7 is defined by an external switch table 4: k1~k64 single-key data code table key data codes d0~d6 data code d7 key data codes d0~d6 data code d7 k1 0000 000 0/1 k33 0000 001 0/1 k2 1000 000 0/1 k34 1000 001 0/1 k3 0100 000 0/1 k35 0100 001 0/1 k4 1100 000 0/1 k36 1100 001 0/1 k5 0010 000 0/1 k37 0010 001 0/1 k6 1010 000 0/1 k38 1010 001 0/1 k7 0110 000 0/1 k39 0110 001 0/1 k8 1110 000 0/1 k40 1110 001 0/1 k9 0001 000 0/1 k41 0001 001 0/1 k10 1001 000 0/1 k42 1001 001 0/1 k11 0101 000 0/1 k43 0101 001 0/1 k12 1101 000 0/1 k44 1101 001 0/1 k13 0011 000 0/1 k45 0011 001 0/1 k14 1011 000 0/1 k46 1011 001 0/1 k15 0111 000 0/1 k47 0111 001 0/1 k16 1111 000 0/1 k48 1111 001 0/1 k17 0000 100 0/1 k49 0000 101 0/1 k18 1000 100 0/1 k50 1000 101 0/1 k19 0100 100 0/1 k51 0100 101 0/1 k20 1100 100 0/1 k52 1100 101 0/1 k21 0010 100 0/1 k53 0010 101 0/1 k22 1010 100 0/1 k54 1010 101 0/1 k23 0110 100 0/1 k55 0110 101 0/1 k24 1110 100 0/1 k56 1110 101 0/1 k25 0001 100 0/1 k57 0001 101 0/1 k26 1001 100 0/1 k58 1001 101 0/1 k27 0101 100 0/1 k59 0101 101 0/1 k28 1101 100 0/1 k60 1101 101 0/1 k29 0011 100 0/1 k61 0011 101 0/1 k30 1011 100 0/1 k62 1011 101 0/1 k31 0111 100 0/1 k63 0111 101 0/1 k32 1111 100 0/1 k64 1111 101 0/1 note: d7 is defined by an external switch d7=0 : connect to vdd d7=1 : connect to vss
HT6220A/ht6221a/ht6222a rev. 1.00 8 july 27, 2009 ( d 9 ( d 6 8 ( d 9 ( d 6 8 6 8 6 8 ( d 9 ( d 9 - 0 9 h h 0 9 - 0 9 - 0 9 ( d 9 ( d 9 ! " ! " ! " )
9 ! " . % 9 6 9 # 8 9
9 )
9
9 - 0 9 h h 0 9 - 0 9 - 0 9 . % 9 6 9 # 8 9 . h h - 0 9 9 . h h - 0 9 timing 4. invalid double-key input - 0 9 ! " 6 8 ( d - 0 9 ! " 6 8 h . % 9 . % 9 i . % 9
9
9 ( d note: kn can be one of k1~k64 timing 5. valid single-key input
application circuits HT6220A application circuit note: typical infrared diode: el-1l2 (kodenshi corp.) HT6220A/ht6221a/ht6222a rev. 1.00 9 july 27, 2009 ( d i 0 9 9 ( d - 0 9 - 0 9 . % 9 6 9 # 8 ! " 9
9 : 9
9 note: km can be one of k22~k24 timing 6. valid double-key input * % * - $ . . ; 1 $ $ - $ $ 1 $ 0 ' ( ) - . 1 0 - 1 ! " - - . * @ 2 0 (

# * 0 + , - - - - 1 0 * % - * - % / . - 1 0 1 0 ) % 1 1 / * % / . / 1 . dout and ir led after the transmission codes are sent, the dout pin generates transmission codes with a carrier, and the ir-led goes low to drive a transmission indicator. the dout pin abbreviate exterior transistor, to provide large current driving ability. irc the frequency of the internal rc(irc) oscillator is de - pending on the temperature and operating voltage. at ta=25 c at 3.0v, the irc has an accuracy of 1 per cent. in the range of 0 cto70 c at 2.0v~3.6v, the accu - racy value of the rc frequency increases to the maxi - mum value of 2 per cent.
ht6221a application circuit note: typical infrared diode: el-1l2 (kodenshi corp.) HT6220A/ht6221a/ht6222a rev. 1.00 10 july 27, 2009 * . * - 1 . . ; % ) % % 0 * % $ $ $ - $ ' ( ) - 1 0 * % / . - 1 0 * % / . - 1 0 * % / - . - - / % * 0 1 - - . 1 ! " + , ; * @ 2 0 (

# * 0 + ,
ht6222a application circuit note: typical infrared diode: el-1l2 (kodenshi corp.) HT6220A/ht6221a/ht6222a rev. 1.00 11 july 27, 2009 * / - 1 . . ; % ) % % 0 * % $ 1 $ 0 $ * $ % ' ( ) $ $ $ - $ - - - - - 1 - 0 1 0 * % - * - % - / . - / . 1 0 * % - 1 0 * % / . / 1 . 1 1 - 1 - 1 1 1 1 0 1 0 * % 1 * 1 % 1 / 0 . / - . - - 0 0 0 - 0 . / % * 0 1 - - 1 0 * ! " + , ; * @ 2 0 (

# * - % + ,
package information 16-pin nsop (150mil) outline dimensions ms-012 symbol dimensions in mil min. nom. max. a 228 244 b 150 157 c1 2 20 c
386 394 d 69 e 50 f4 10 g1 6 50 h7 10 08 HT6220A/ht6221a/ht6222a rev. 1.00 12 july 27, 2009 0 / % ' , @ < g
20-pin sop (300mil) outline dimensions ms-013 symbol dimensions in mil min. nom. max. a 393 419 b 256 300 c1 2 20 c
496 512 d 104 e 50 f4 12 g1 6 50 h8 13 08 HT6220A/ht6221a/ht6222a rev. 1.00 13 july 27, 2009 . . ' , @ g <
24-pin sop (300mil) outline dimensions ms-013 symbol dimensions in mil min. nom. max. a 393 419 b 256 300 c1 2 20 c
598 613 d 104 e 50 f4 12 g1 6 50 h8 13 08 HT6220A/ht6221a/ht6222a rev. 1.00 14 july 27, 2009 - ' , @ g <
product tape and reel specifications reel dimensions sop 16n (150mil) symbol description dimensions in mm a reel outer diameter 330.0 1.0 b reel inner diameter 100.0 1.5 c spindle hole diameter 13.0 +0.5/-0.2 d key slit width 2.0 0.5 t1 space between flange 16.8 +0.3/-0.2 t2 reel thickness 22.2 0.2 sop 20w, sop 24w symbol description dimensions in mm a reel outer diameter 330.0 1.0 b reel inner diameter 100.0 1.5 c spindle hole diameter 13.0 +0.5/-0.2 d key slit width 2.0 0.5 t1 space between flange 24.8 +0.3/-0.2 t2 reel thickness 30.2 0.2 HT6220A/ht6221a/ht6222a rev. 1.00 15 july 27, 2009 ' " "
carrier tape dimensions sop 16n (150mil) symbol description dimensions in mm w carrier tape width 16.0 0.3 p cavity pitch 8.0 0.1 e perforation position 1.75 0.1 f cavity to perforation (width direction) 7.5 0.1 d perforation diameter 1.55 +0.10/-0.00 d1 cavity hole diameter 1.50 +0.25/-0.00 p0 perforation pitch 4.0 0.1 p1 cavity to perforation (length direction) 2.0 0.1 a0 cavity length 6.5 0.1 b0 cavity width 10.3 0.1 k0 cavity depth 2.1 0.1 t carrier tape thickness 0.30 0.05 c cover tape width 13.3 0.1 sop 20w symbol description dimensions in mm w carrier tape width 24.0 +0.3/-0.1 p cavity pitch 12.0 0.1 e perforation position 1.75 0.10 f cavity to perforation (width direction) 11.5 0.1 d perforation diameter 1.5 +0.1/-0.0 d1 cavity hole diameter 1.50 +0.25/-0.00 p0 perforation pitch 4.0 0.1 p1 cavity to perforation (length direction) 2.0 0.1 a0 cavity length 10.8 0.1 b0 cavity width 13.3 0.1 k0 cavity depth 3.2 0.1 t carrier tape thickness 0.30 0.05 c cover tape width 21.3 0.1 HT6220A/ht6221a/ht6222a rev. 1.00 16 july 27, 2009 3 j 3 3 . , @ . . ' . ( d ; & d e
e
e 9 # $ <
sop 24w symbol description dimensions in mm w carrier tape width 24.0 0.3 p cavity pitch 12.0 0.1 e perforation position 1.75 0.1 f cavity to perforation (width direction) 11.5 0.1 d perforation diameter 1.55 +0.10/-0.00 d1 cavity hole diameter 1.50 +0.25/-0.00 p0 perforation pitch 4.0 0.1 p1 cavity to perforation (length direction) 2.0 0.1 a0 cavity length 10.9 0.1 b0 cavity width 15.9 0.1 k0 cavity depth 3.1 0.1 t carrier tape thickness 0.35 0.05 c cover tape width 21.3 0.1 HT6220A/ht6221a/ht6222a rev. 1.00 17 july 27, 2009
HT6220A/ht6221a/ht6222a rev. 1.00 18 july 27, 2009 copyright 2009 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. (shenzhen sales office) 5f, unit a, productivity building, no.5 gaoxin m 2nd road, nanshan district, shenzhen, china 518057 tel: 86-755-8616-9908, 86-755-8616-9308 fax: 86-755-8616-9722 holtek semiconductor (usa), inc. (north america sales office) 46729 fremont blvd., fremont, ca 94538, usa tel: 1-510-252-9880 fax: 1-510-252-9885 http://www.holtek.com

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