UT912EG-D14-T [UTC]
Transmitter/Receiver IC;型号: | UT912EG-D14-T |
厂家: | Unisonic Technologies |
描述: | Transmitter/Receiver IC 商用集成电路 |
文件: | 总9页 (文件大小:296K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
UT912E
CMOS IC
ENCODER FOR REMOTE
CONTROLLER
DESCRIPTION
The UTC UT912E of CMOS LSIs for remote control system
DIP-18
DIP-14
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.
SOP-16
SOP-20
FEATURES
* 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
Package
Packing
Lead Free
Halogen Free
UT912EG-D14-T
UT912EG-D18-T
UT912EG-S16-R
UT912EG-S20-R
UT912EL-D14-T
DIP-14
DIP-18
SOP-16
SOP-20
Tube
Tube
-
-
-
Tape Reel
Tape Reel
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UT912E
CMOS IC
MARKING
Packing
MARKING
DIP-14
DIP-18
15
16
14 13 12 11 10
9
Date Code
UTC
UT912E
L: Lead Free
G: Halogen Free
Lot Code
SOP-16
SOP-20
4
6
7
8
1
2
5
3
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UT912E
CMOS IC
PIN CONFIGURATION
PIN DESCRIPTION
PIN NAME
A0 ~ A7
I/O
INTERNAL CONNECTION
NMOS TRANSMISSION
GATE PROTECTION DIODE These pins can be externally set to VSS or left open
NMOS TRANSMISSION Input pins for address/data AD8 ~ AD11 setting
GATE PROTECTION DIODE These pins can be externally set to VSS or left open
DESCRIPTION
Input pins for address A0 ~ A7 setting
Ⅰ
Ⅰ
AD8 ~ AD11
DOUT
TE
O
Ⅰ
Ⅰ
O
Ⅰ
Ⅰ
CMOS OUT
Encoder data serial transmission output
Transmission enable, active low
Oscillator input pin
CMOS IN Pull-high
OSCILLATOR 1
OSCILLATOR 1
OSC1
OSC2
VSS
Oscillator output pin
Negative power supply (GND)
Positive power supply
VDD
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UT912E
CMOS IC
BLOCK DIAGRAM
TE trigger
OSC2 OSC1
Data Select
and Driver
Osc Circuit
Fosc/3 Divider
DOUT
TE
12 bit Add/Data
Decoder
Sync.
Circuit
A0
A7
12 bit Add/Data
Input Circuit
Binary Detector
Vss
VDD
AD8
AD11
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UT912E
CMOS IC
ABSOLUTE MAXIMUM RATINGS (TA=25°C, unless otherwise specified)
PARAMETER
SYMBOL
VDD
RATINGS
-0.3 ~ +13
UNIT
V
Supply Voltage
Input Voltage
VIN
Vss-0.3 ~ VDD+0.3
-20 ~ +85
V
Operating Temperature
Storage Temperature
TOPR
TSTG
°C
°C
-40 ~ +150
ELECTRICAL CHARACTERISTICS (TA=25°C, unless otherwise specified)
PARAMETER
SYMBOL
VDD
TEST CONDITIONS
MIN
2.4
TYP
5
MAX UNIT
Operating Voltage
12
1
V
VDD=3V
0.1
2
Standby Current
ISTN-BY
IOPR
Oscillator stops
μA
V
DD=12V
VDD=3V
DD=12V
VOH=0.9VDD(Source)
OL=0.1VDD (Sink)
4
No load,
40
80
300
Operating Current
μA
Fosc=3kHz
V
150
-1.6
1.6
-1
Output Driver Current
IDOUT
VDD=5V
mA
V
1
0.8VDD
0
High
Low
VIH
VIL
VDD
V
V
Input Voltage
0.2VDD
Oscillator Frequency
fosc
RTE
Rosc=1.1MΩ, VDD=5V
3
kHz
MΩ
TE Pull-high Resistance
VTE=0V, VDD=5V
1.5
3
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UT912E
CMOS IC
OPERATION FLOWCHART
Power on
Standby mode
No
Transmission
enabled?
TE receied a low signal.
Yes
4 data words
transmitted
No
Transmission
still enabled
TE return high.
TE still is held low.
Yes
4 data words
transmitted
contiuously
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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
Transmission
DOUT
Medium
VDD
A0 A1 A2 A3 A4 A5 A6 A7 VSS TE AD8 AD9AD10AD11
VDD
VSS
Transmitted information:
Pilot &
Sync.
A0
1
A1
0
A2
1
A3
0
A4
0
A5
0
A6
1
A7
1
AD8
1
AD9
1
AD10 AD11
1
0
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UT912E
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
18
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
17
16
15
14
13
12
11
10
Rosc
AD8
APPROXIMATE INTERNAL CONNECTIONS
CMOS IN
Pull-high
NMOS
TRANSMISSION
GATE
CMOS OUT
NMOS TRANSMISSION GATE
PROTECTION DIODE
OSCILLATOR 1
EN
OSC1
OSC2
VDD
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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.
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