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PDF UT912D Data sheet ( Hoja de datos )
| Número de pieza | UT912D | |
| Descripción | DECODERS | |
| Fabricantes | Unisonic Technologies | |
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UNISONIC TECHNOLOGIES CO.,
UT912D
DECODERS FOR REMOTE
CONTROLLER
CMOS IC
DESCRIPTION
The UTC UT912D of CMOS LSIs for remote control system
applications are paired with UTC UT912E (refer to the
encoder/decoder cross reference table) and is capable of
decoding information which consists of N address bits and 12-N
data bits. For proper operation, a pair of encoder/decoder with the
same number of addresses and data format should be chosen.
The UTC UT912D also is arranged to provide 8 address bits and
4 data bits.
The decoders receive serial addresses and data from a
programmed UTC UT912E of encoders that are transmitted
together with the header bits by a RF or an infrared transmission
medium upon receipt of a trigger signal. If no error or unmatched
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.
FEATURES
* Pair with UTC UT912E
* Operating voltage: 2.4V ~ 12V
* Low power and high noise immunity CMOS technology
* Low standby current
* Built-in oscillator needs only 5% resistor
* Binary address setting
* Received codes are checked 3 times
* Capable of decoding 12 bits of information
* Address/Data number combination: 8 address bits and 4 data
bits
* Vaild transmission indicator
* Minimal external components
SOP-20
DIP-18
*Pb-free plating product number: UT912DL
ORDERING INFORMATION
Order Number
Normal
Lead free
UT912D-D18-T UT912DL-D18-T
UT912D-S20-R UT912DL-S20-R
UT912D-S20-T UT912DL-S20-T
Package Packing
DIP-18
SOP-20
SOP-20
Tube
Tape Reel
Tube
ENCODER/DECORDER CROSS REFERENCE TABLE
Decoder Part No. Data Pins Address Pins VT Pair Encoder
Package
Encoder
Decoder
UTC UT912D
4
8 √ UTC UT912E DIP-14/18 SOP-16/20 DIP-18 SOP-20
www.unisonic.com.tw
Copyright © 2005 Unisonic Technologies Co.,
1
QW-R502-044,A
1 page  
UT912D
CMOS IC
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
TE
Encoder
DOUT
Decoder V T
Latched
Data Out
< 1 word
4 words
check
Transmitted
Continuously
214 clocks
check
4 words
214 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
0 1 2 3 4 5 6 7 8 9 10 11
A0 A1 A2 A3 A4 A5 A6 A7 D8 D9 D10 D11
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5
QW-R502-044,A
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet UT912D.PDF ] | |
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