HT12D/HT12F

2

Selection Table

Function

Address

No.

Data

VT

Oscillator

Trigger

Package

Part No.

No.

Type

HT12D

8

4

L

Ö

RC oscillator

DIN active

²Hi²

18DIP, 20SOP

HT12F

12

0

¾Ö

RC oscillator

DIN active

²Hi²

18DIP, 20SOP

Notes: Data type: L stands for latch type data output.

VT can be used as a momentary data output.

Rev. 1.20

1

February 20, 2009

General Description

The 2

control system applications. They are paired with

Holtek

coder cross reference table). For proper operation, a

pair of encoder/decoder with the same number of ad-

dresses and data format should be chosen.

The decoders receive serial addresses and data from a

programmed 2

by a carrier using an RF or an IR transmission medium.

They compare the serial input data three times continu-

ously with their local addresses. If no error or un-

matched codes are found, the input data codes are

decoded and then transferred to the output pins. The VT

pin also goes high to indicate a valid transmission.

The 2

informations that consist of N bits of address and 12

-N

bits of data. Of this series, the HT12D is arranged to pro-

vide 8 address bits and 4 data bits, and HT12F is used to

decode 12 bits of address information.

Features

technology

medium

Applications