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Features
· · · · · ·

24

HT6P20 OTP Encoder

Operating voltage: 2V~12V Low power consumption Built-in oscillator needs only 5% resistor 0/2/4/8 data selectable 224 maximum address and data codes Easy interface with an RF or IR medium

· · · ·

One time programmable process Data active: D0~D7 Minimal external components HT6P20/A/B: 8-pin DIP/NSOP package HT6P20/D: 16-pin DIP/NSOPpackage

Applications
· · · ·

Burglar alarm system Smoke and fire alarm system Garage door controllers Car door controllers

· · ·

Security system Cordless telephones Other remote control systems

General Description
The HT6P20 is a CMOS LSI encoder designed for remote control system applications. It encodes 24 bits of information and then serially transmits it via the DOUT pin uponreceipt of transmission enable (DATA pins: D0~D7) signals. The combination of address and data bits of the HT6P20 is designed using one time programmable process. In addition, the chip offers various packaging for flexible combination of programmable address/data so as to meet various applications. Its programmable address/data is transmitted together with the anti-code bits via RF or infraredtransmission medium upon receipt of a trigger signal.

Block Diagram
O S C 1 O S C 2 V P P S IO A d d re s s C o u n te r

O s c illa to r

P r o g r a m m in g C ir c u it

M ix e r & D r iv e r

D O U T

C o n tr o l U n it

D a ta L a tc h

P G M

D 0

D 7

Note: Address/Data numbers are available in various combinations, refer to the functional descrip tion.

1

May 2,2000

HT6P20
Pin Assignment
2 4 -A d d re s s 0 -D a ta 2 2 -A d d re s s 2 -D a ta 2 0 -A d d re s s 4 -D a ta
D 1 1 2 3 4 5 6 7 8 D 2 D 3 V S S P G M 1 8 2 7 3 6 4 5 V S S O S C 2 O S C 1 S IO V P P V D D D O U T D 0 1 8 2 7 3 6 4 5 D 1 V S S O S C 2 N C V D D D O U T O S C 1 N C N C N C N C 1 6 1 5 1 4 1 3 1 2 1 1 1 0 9 D 0 P G M S IO V P P V D D D O U T O S C 1 O S C 2

H T 6 P 2 0 A 8 DIP /N S O P B la n k d e v ic e

H T 6 P 2 0 B 8 D IP /N S O P B la n k d e v ic e
D 1 1 2 3 4 5 6 7 8 D 2 /N C D 3 /N C V S S 1 6 1 5 1 4 1 3 1 2 1 1 1 0 9 D 0 P G M S IO V P P V D D D O U T O S C 1 O S C 2

H T 6 P 2 0 D 1 6 D IP /N S O P

P G M 1 2 3 4 V S S O S C 2 O S C 1

8 7 6 5

S IO V P P V D D D O U T

D 4 /N C D 5 /N C D 6 /N C D 7 /N C

H T 6 P 2 0 8 D IP /N S O P

HT 6 P 2 0 1 6 D IP /N S O P

Note: The customer code and control code have been programmed into HT6P20A/B/D by Holtek¢s factory process. The blank device HT6P20 is not programmed, it can be programmed by Holtek¢s programming kit. Warning: The 8-pin blank device only allows programming as HT6P20A type. The 16-pin blank device allows programming as one of HT6P20/D type. After programming theHT6P20 pin name are the same as one of HT6P20D, which is determined by the kit programming procedure. Pin name ²NC² stands for no connection (floating).

2

May 2, 2000

HT6P20
Pad Assignment
D O U T V D D V P P 1 S IO P G M D 0 N C D 1 6 7 D 2 8 D 3 9 N C 1 0 V S S 1 1 N C 1 2 D 4 1 3 D 5 1 4 D 6 1 5 N C 5 4 3 (0 ,0 ) 1 8 1 7 1 6 O S C 1 O S C 2 D 7 2

Pad Coordinates
Pad No. 1 2 3 4 5 6 78 9 10 11 12 13 14 15 16 17 18 19 20 X -956.50 -1123.00 -1123.00 -1123.00 -1123.00 -1123.00 -1027.50 -852.50 -530.00 -355.00 -180.00 142.50 317.50 640.00 815.00 1137.50 1118.00 1118.00 489.00 223.50

Unit: mm Y 762.75 498.75 236.25 -86.25 -261.25 -583.75 -776.75 -776.75 -776.75 -776.75 -776.75 -776.75 -776.75 -776.75 -776.75 -776.75 -466.75 -205.75 772.05 789.75

2 0

1 9

Chip size: 2590´ 2010 (mm)

2

* The IC substrate should be connected to VSS in the PCB layout artwork.

Pin Description
HT6P20D Pin No. Pin Name I/O 16 1~3 4 5~8 9 10 11 12 13 14 15 D0~D3 VSS NC OSC2 OSC1 DOUT VDD VPP SIO PGM I ¾ ¾ O I O ¾ I I/O I Internal Connection CMOS IN Pull-high ¾ ¾ Description Data input and transmission enable (active low) They can be externally set to VSS or left open....
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