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UNISONIC TECHNOLOGIES CO., UT912D
DECODERS FOR REMOTE CONTROLLER
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.
CMOS IC
SOP-20
DIP-18
*Pb-free plating product number: UT912DL
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
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 DIP-18 SOP-20 SOP-20 Packing Tube Tape Reel Tube
ENCODER/DECORDER CROSS REFERENCE TABLE
Decoder Part No. UTC UT912D Data Pins 4 Address Pins 8 VT Pair Encoder UTC UT912E Package Encoder Decoder DIP-14/18 SOP-16/20 DIP-18 SOP-20
www.unisonic.com.tw Copyright (c) 2005 Unisonic Technologies Co.,
1
QW-R502-044,A
UT912D
PIN CONFIGURATION
DIP-18
A0 A1 A2 A3 A4 A5 A6 A7 VSS 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 VDD VT OSC1 OSC2 DIN D11 D10 D9 D8 NC A0 A1 A2 A3 A4 A5 A6 A7 VSS 1 2 3 4 5 6 7 8 9 10
CMOS IC
SOP-20
20 19 18 17 16 15 14 13 12 11 NC VDD VT OSC1 OSC2 DIN D11 D10 D9 D8
PIN DESCRIPTION
PIN NAME A0 ~ A7 D8 ~ D11 DIN VT OSC1 OSC2 VSS VDD I/O I O I O I O INTERNAL CONNECTION DESCRIPTION Input pins for address A0 ~ A7 setting, these pins can be NMOS Transmission Gate externally set to VSS or left open. CMOS OUT Output data pins, power-on state is low. CMOS IN Serial data input pin CMOS OUT Valid transmission, active high Oscillator Oscillator input pin Oscillator Oscillator output pin Negative power supply, (GND) Positive power supply
BLOCK DIAGRAM
OSC 2 OSC1
Oscillator
Divider
Data Shift Register
Latch Circuit
Data
DIN
Buffer
Data Detector
Sync . Detector
Comparator
Comparator
Control Logic
Transmission Gate Circuit
Buffer
VT
Address
VDD
VSS
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2
QW-R502-044,A
UT912D
ABSOLUTE MAXIMUM RATINGS
CMOS IC
PARAMETER SYMBOL RATINGS UNIT Supply Voltage VDD -0.3 ~ +13 V Input Voltage VIN Vss-0.3 ~ VDD+0.3 V Operating Temperature TOPR 0 ~ +70 Storage Temperature TSTG -40 ~ +150 Note:Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.
ELECTRICAL CHARACTERISTICS (Ta=25, VDD=5V, unless otherwise specified.)
PARAMETER Operating Voltage Standby Current Operating Current Data Output Current (D8~D11) VT Output Current Input Voltage Oscillator Frequency High Low SYMBOL VOPR ISTN-BY IOPR IDOUT IVT VIH VIL fosc TEST CONDITIONS VDD=5V VDD=12V No load, fOSC=150kHz, VDD=5V VOH=4.5V (Source) VDD=5V VOL=0.5V (Sink) VOH=4.5V (Source) VDD=5V VOL=0.5V (Sink) Oscillator stops MIN 2.4 TYP MAX 5 12 0.1 1 2 4 159 400 -1.99 1.9 -1.564 1.53 5 1 149 UNIT V A A mA mA V V kHz
-1 1 -1 1 3.5 0
Rosc=1.1M, VDD=5V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3
QW-R502-044,A
UT912D
OPERATION FLOWCHART
CMOS IC
The oscillator is disabled in the standby state and activated when a logic "high" signal applies to the DIN pin. That is to say, the DIN should be kept low if there is no signal input.
Power on
Standby mode
No
Code in ? Yes No
Disable V T & ignore the rest of this word
Address bits matched ? Yes Store data
Match previous stored data ? Yes
3 times of checking completed ?
No
No
Yes Latch data to output & activate V T
No
Address or data error ? Yes
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4
QW-R502-044,A
UT912D
FUNCTIONAL DESCRIPTION
Operation
CMOS IC
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 < 1 word Encoder DOUT 4 words 2 clocks Decoder V T check Latched Data Out check
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 Address/ Data 0 A0 1 A1 2 A2 3 A3 4 A4 5 A5 6 A6 7 A7 8 D8 9 D9 10 D10 11 D11
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5
QW-R502-044,A
UT912D
APPLICATION CIRCUITS
CMOS IC
Receiver Circuit 1 2 3 4 18 17 VDD
A0 A1 A2
VDD
A3 5 A4 6 A5 7 A6 8 A7 9 VSS
VT 16 OSC1 15 Rosc OSC2 14 DIN D11 13 12 D10 D9 11 10 D8
APPROXIMATE INTERNAL CONNECTION CIRCUITS
NMOS Transmission Gate
CMOS OUT
CMOS IN
EN OSC1
Oscillator OSC2
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
6
QW-R502-044,A
UT912D
OSCILLATOR FREQUENCY VS SUPPLY VOLTAGE
fosc (Scale)
CMOS IC
Rosc ( ) 4.00
3.50 27k 3.00 30k 33k 36k 39k 43k 47k 51k 56k 62k 68k 75k 82k 100k 120k 150k 180k 220k
2.50
2.00
1.50
(100kHz) 1.00
0.50
0.25
2
3
4
5
6
7
8
9
10
11
12
13 VDD (VDC)
Note: The recommended oscillator frequency is fOSCD (decoder)50 fOSCE (UTC UT912E encoder)
U T C a ssu m e s n o re sp o n sib ility fo r e q u ip m e n t fa ilu re s th a t re su lt fro m u sin g p ro d u c ts a t v a lu e s th a t e x c e e d , e v e n m o m e n ta rily , ra te d v a lu e s (su c h a s m a x im u m ra tin g s, o p e ra tin g c o n d itio n ra n g e s, o r o th e r p a ra m e te rs) liste d in p ro d u c ts sp e c ific a tio n s o f a n y a n d a ll U T C p ro d u c ts d e sc rib e d o r c o n ta in e d h e re in . U T C p ro d u c ts a re n o t d e sig n e d fo r u se in life su p p o rt a p p lia n c e s, d e v ic e s o r sy ste m s w h e re m a lf u n c tio n o f th e se p ro d u c ts c a n b e re a so n a b ly e x p e c te d to re su lt in p e rso n a l in ju ry . R e p ro d u c tio n in w h o le o r in p a rt is p ro h ib ite d w ith o u t th e p rio r w ritte n c o n se n t o f th e c o p y rig h t o w n e r. T h e in fo rm a tio n p re se n te d in th is d o c u m e n t d o e s n o t fo rm p a rt o f a n y q u o ta tio n o r c o n tra c t, is b e lie v e d to b e a c c u ra te a n d re lia b le a n d m a y b e c h a n g e d w ith o u t n o tic e .
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
7
QW-R502-044,A

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