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Features
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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

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

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

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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 upon receipt 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 infrared transmission 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.

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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 D