UT912D-S20-R datasheet(5/7 Pages) UTC

5 / 7 page

UT912D

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

www.unisonic.com.tw

QW-R502-044,A

FUNCTIONAL DESCRIPTION

Operation

The UTC UT912D offers different packages by various combinations of addresses and data pins to pair with the

UTC UT912E. The decoders receive data that are transmitted by an encoder and interpret the first N bits of code

period as addresses and the last 12-N bits as data, where N is the address code number. A signal on the DIN pin

activates the oscillator, which in turn decodes the incoming address and data. The decoders will then check the

received address three times continuously. If the received address codes all match the contents of the decoder-s

local address, the 12-N bits of data are decoded to activate the output pins and the VT pin is set high to indicate a

valid transmission. This will last unless the address code is incorrect or no signal is received. The output of the VT

pin is high only when the transmission is valid. Otherwise it is always low.

Decoder timing

Encoder

DOUT

Decoder V T

Latched

Data Out

check

4 words

< 1 word

2 clocks

Transmitted

Continuously

4 words

2 clocks

Address/Data sequence

The following provides the address/data sequence table for various models of the UTC UT912D. The correct

device should be selected according to the individual address and data requirements.

Bits

Address/

Data

D10 D11

UT912D-S20-R 데이터시트(PDF) 5 Page - Unisonic Technologies