UT912D

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

5

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

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

Decoder timing

TE

Encoder

DOUT

Latched

Data Out

check

check

4 words

< 1 word

2 clocks

14

Transmitted

Continuously

4 words

2 clocks

14

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

0

1

2

3

4

5

6

7

8

9

10

11

Address/

Data

A0

A1

A2

A3

A4

A5

A6

A7

D8

D9

D10 D11