Datasheet

UNISONIC TECHNOLOGIES CO., LTD
UT912E
CMOS IC
ENCODER FOR REMOTE
CONTROLLER

DESCRIPTION
The UTC UT912E of CMOS LSIs for remote control system
applications is capable of encoding information which consists
of N address bits and 12-N data bits. Each address/data input
can be set to one of the two logic states. The programmed
addresses/data are transmitted together with the header bits
by a RF or an infrared transmission medium upon receipt of a
trigger signal.

FEATURES
DIP-14
DIP-18
SOP-16
SOP-20
* Operating voltage: 2.4V ~ 12V
* Low power and high noise immunity CMOS technology
* Low standby current (0.1μA (typ.) at VDD=5V)
* Minimum transmission word (Four words)
* Built-in oscillator needs only 5% resistor
* Data code has positive polarity
* Minimal external components

ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
UT912EL-D14-T
UT912EG-D14-T
UT912EG-D18-T
UT912EG-S16-R
UT912EG-S20-R
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
Package
Packing
DIP-14
DIP-18
SOP-16
SOP-20
Tube
Tube
Tape Reel
Tape Reel
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UT912E
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CMOS IC
MARKING
Packing
MARKING
DIP-14
DIP-18
16 15 14
13
12
11
10
9
UTC
UT912E
SOP-16
1
2
3
4
5
6
7
8
Date Code
L: Lead Free
G: Halogen Free
Lot Code
SOP-20
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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UT912E
CMOS IC

PIN CONFIGURATION

PIN DESCRIPTION
PIN NAME
I/O
A0 ~ A7
Ⅰ
AD8 ~ AD11
Ⅰ
DOUT
TE
OSC1
OSC2
VSS
VDD
O
Ⅰ
Ⅰ
O
Ⅰ
Ⅰ
INTERNAL CONNECTION
NMOS TRANSMISSION
GATE PROTECTION DIODE
NMOS TRANSMISSION
GATE PROTECTION DIODE
CMOS OUT
CMOS IN Pull-high
OSCILLATOR 1
OSCILLATOR 1
UNISONIC TECHNOLOGIES CO., LTD
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DESCRIPTION
Input pins for address A0 ~ A7 setting
These pins can be externally set to VSS or left open
Input pins for address/data AD8 ~ AD11 setting
These pins can be externally set to VSS or left open
Encoder data serial transmission output
Transmission enable, active low
Oscillator input pin
Oscillator output pin
Negative power supply (GND)
Positive power supply
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CMOS IC
BLOCK DIAGRAM
TE trigger
OSC2 OSC1
TE
A0
Osc Circuit
12 bit Add/Data
Input Circuit
A7
Fosc/3 Divider
12 bit Add/Data
Decoder
Data Select
and Driver
DOUT
Sync.
Circuit
Binary Detector
AD8
AD11
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VDD
Vss
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CMOS IC
ABSOLUTE MAXIMUM RATINGS (TA=25°C, unless otherwise specified)
PARAMETER
Supply Voltage
Input Voltage
Operating Temperature
Storage Temperature

SYMBOL
VDD
VIN
TOPR
TSTG
RATINGS
-0.3 ~ +13
Vss-0.3 ~ VDD+0.3
-20 ~ +85
-40 ~ +150
UNIT
V
V
°C
°C
ELECTRICAL CHARACTERISTICS (TA=25°C, unless otherwise specified)
PARAMETER
Operating Voltage
Standby Current
SYMBOL
VDD
ISTN-BY
TEST CONDITIONS
Oscillator stops
Operating Current
IOPR
No load,
Fosc=3kHz
Output Driver Current
IDOUT
VDD=5V
Input Voltage
High
Low
Oscillator Frequency
TE Pull-high Resistance
VIH
VIL
fosc
RTE
Rosc=1.1MΩ, VDD=5V
VTE=0V, VDD=5V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
VDD=3V
VDD=12V
VDD=3V
VDD=12V
VOH=0.9VDD(Source)
VOL=0.1VDD (Sink)
MIN
2.4
-1
1
0.8VDD
0
TYP
5
0.1
2
40
150
-1.6
1.6
MAX
12
1
4
80
300
μA
μA
mA
VDD
0.2VDD
3
1.5
UNIT
V
3
V
V
kHz
MΩ
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UT912E
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CMOS IC
OPERATION FLOWCHART
Power on
Standby mode
No
Transmission
enabled?
TE receied a low signal.
Yes
4 data words
transmitted
No
TE return high.
Transmission
still enabled
Yes
TE still is held low.
4 data words
transmitted
contiuously
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www.unisonic.com.tw
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UT912E

CMOS IC
FUNCTIONAL DESCRIPTION
Operation
The UTC UT912E start a cycle of 4-words transmission upon receipt of a transmission enable (TE). A completed
cycle is showed as below. This cycle will repeat itself as long as the transmission enable is held low. While the
transmission enable returns high the encoder output completes its final cycle and then stops.
TE
<1 word
Encoder
DOUT
Transmitted
Continuously
4 words
4 words
Address/data bit waveform
Each programmable address/data pin can be externally set to one of the following two logic states as shown
below.
fosc
"One"
"Zero"
Address/
Data Bit
Address/data programming (preset)
The status of each address/data pin can be individually pre-set to logic ”high” or ”low”. If a transmission-enable
signal is applied, the encoder scans and transmits the status of the 12 bits of address/data serially in the order A0 to
AD11. During information transmission these bits are transmitted with a preceding synchronization bit. If the trigger
signal is not applied, the chip enters the standby mode and consumes a reduced current of less than 1μA for a
supply voltage of 5V.
The following figure shows an application using the UTC UT912E:
OSC1 OSC2
DOUT
VDD
A0
A1 A2
A3 A4
A5 A6
Transmission
Medium
A7 VSS TE AD8 AD9 AD10 AD11
VDD
VSS
Transmitted information:
Pilot &
Sync.
A0
1
A1
0
A2
1
A3
0
A4
0
UNISONIC TECHNOLOGIES CO., LTD
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A5
0
A6
1
A7
1
AD8
1
AD9
1
AD10
1
AD11
0
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CMOS IC
FUNCTIONAL DESCRIPTION (Cont.)
Address/Data sequence
The following provides the address/data sequence table for various models of the UTC UT912E encoders. The
correct device should be selected according to the individual address and data requirements.
Bits
Address/
Date

0
1
2
3
4
5
6
7
8
9
10
11
A0
A1
A2
A3
A4
A5
A6
A7
AD8
AD9
AD10
AD11
TYPICAL APPLICATION CIRCUIT
Transmitter Circuit
VDD
1
2
3
4
5
6
7
8
9

A0
A1
A2
A3
A4
A5
A6
A7
VSS
VDD
DOUT
OSC1
OSC2
TE
AD11
AD10
AD9
AD8
18
17
16
15
14
13
12
11
10
Rosc
APPROXIMATE INTERNAL CONNECTIONS
CMOS IN
Pull-high
NMOS
TRANSMISSION
GATE
NMOS TRANSMISSION GATE
PROTECTION DIODE
OSCILLATOR 1
EN
OSC1
CMOS OUT
OSC2
VDD
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www.unisonic.com.tw
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UT912E

CMOS IC
OSCILLATOR FREQUENCY VS SUPPLY VOLTAGE
The recommended oscillator frequency is fOSCD (decoder) ≌ 50fOSCE (UT912E encoder)
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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