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Silan
Semiconductors
224 OTP ENCODER
DESCRIPTION
The SC9314 is CMOS LSI encoder designed for remote control
system applications. It encodes 24 bits of information and then
serially transmits it via the D
enable (DATA pins: D0~D3) signals. The combination of address
and bits of the SC9314 is designed by a one-time programmable
process. The chip, in addition, offers various packaging for flexible
combination of programmable address/data so as to meet various
applications. Its programmable address/data is transmitted together
with the anti-code bits via RF or infrared transmission medium upon
receipt of a trigger signal.
FEATURES
* Operating voltage: 2V~12V
* Low power consumption
* Built-in oscillator needs only 5% resistor
* 0/2/4/8 data selectable
24
*2
maximum address and data codes
* Easy interface with RF or IR medium
* One-time programmable
* Data active: D0~D3
* Minimal external components
pin upon receipt of transmission
OUT
SC9314
DIP-14
APPLICATIONS
* Burglar alarm system
* Smoke and fire alarm system
* Garage door controllers
* Car door controllers
* Security system
* Cordless telephones
* Other remote control systems
PIN CONFIGURATION
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
D3
V
OSC1
OSC2
D
OUT
NC
NC
SS
1
2
3
4
SC9314
5
6
7 8
1
14
D2
D1
13
D0
12
11
V
DD
10
NC
9
NC
NC
Rev: 1.0 2001.04.15
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Silan
Semiconductors
BLOCK DIAGRAM
SC9314
OSC1
Oscillator
OSC2
Control Unit Data Latch
Note: Address/Data number are available in various combinations, refer to functional description.
Address
Counter
Mixer & Driver
D0
D3
DOUT
ABSOLUTE MAXIMUM RATING
Characteristic Symbol Value Unit
Supply Voltage V
Input Voltage V
Storage temperature T
Operating Temperature T
DD
IN
STG
OPR
0.3~12 V
0.3~ VDD+0.3 V
-50 ~ 125
-20 ~ 70
ELECTRICAL CHARACTERISTICS
Parameter Symbol
Operating Voltage V
Standby Current I
Operating Current I
H Input Voltage V
L Input Voltage V
D0~D7 Pull-High Resistance R
Source
Output Current
Sink
Oscillator Frequency F
STB
DD
I
DOUT
OSC
DD
IH
IL
PH
(VDD=5.0V, T
Test conditions
Condition
V
DD
12V Oscillator stops 1 2 A
12V No load F
12V 150 300 k
5V 0.9V
12V 0.9V
5V 0.1V
12V 0.1V
12V R
DD
DD
DD
DD
=1.4M 3 kHz
OSC
=25°C)
A
Min Typ Max Unit
212V
=3KHz 200 400 A
OSC
0.8 V
DD
00.2V
25 mA
6.5 15 mA
25 mA
615 mA
°C
°C
V
DD
DD
V
V
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2001.04.15
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Semiconductors
PIN DESCRIPTION
Pin No. Symbol I/O Internal Connection Description
14
1~3
4VSSI Negative power supply (GND)
9 OSC2 O OSCILLATOR Oscillator output pin
10 OSC1 I OSCILLATOR Oscillator output pin
11 D
12 V
D0~D3 I CMOS IN Pull-High
OUT
DD
O CMOS OUT Data serial transmission output
I Positive power supply
Data input and transmission enable (active low).
They can be externally set to VSS or left open.
APPROXIMATE INTERNAL CONNECTION CIRCUIT
CMOS IN/OUT CMOSOUT
CMOS IN
Pull-high
OSCILLATOR
FUNCTIONAL DESCRIPTION
Normal operation
The SC9314 encodes and transmits address/data to a decoder upon receipt of a trigger signal. The address
codes of SC9314 are always being transmitted as long as power (V
SC9314 is enabled by the D0~D3 pins (active low). The following is the transmission of the SC9314.
Do~D3
<1 word >1 word
) is supplied. The transmission function of the
DD
SC9314
Ebcider D
A complete code word of the SC9314 consists of 3 periods as shown below.
F
OSC
D
OUT
OUT
1clock
pilot period
(23 clocks)
Transmission timing
1/3 bit
(A0~A19,60clocks)
address code period
A complete code word for the SC9314
(D3~D0,
12clocks)
data code period
01 0 1
anti-code period
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
3
(4 bits)
Rev: 1.0 2001.04.15
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Silan
Semiconductors
The SC9314 detects the logic state of the internal programmed address and the external data pins, and then
transmits the detected information during the code period. Each address/data bit can be set to one of the following
two logic states:
F
OSC
1
0
address/
data bit
Flowchart
Power on
Standby mode
Yes
SC9314
No
No
Transmission
enabled?
Yes
Address/data words
transmitted
Transmission
still enabled?
Yes
Address/data words
transmitted
continuously
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2001.04.15
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Silan
Semiconductors
TYPICAL APPLICATION CIRCUITS
SC9314
Tramsmitter Circuit
1
D3 D2
2
V
SS
3
Rosc=1.4M
OSC1
OSC2
4
5
OUT
D
6
NC NC
7 8
NC
Note: In order to prevent the IC from being damaged owing to the latch up, the 100resistoror the
LED which also can bea transmission indicatoris indispensablewhen V
V
SC9314
NC
NC
14
13
D1
12
D0
11
DD
10
9
12V
Rosc=1.4M
LED
Tramsmitter Circuit
1
D3 D2
2
V
SS
3
OSC1
OSC2
4
OUT
SC9314
5
D
6
NC NC
7 8
NC
DD
=9V~12V.
14
13
D1
12
D0
11
V
DD
NC
10
9
NC
12V
100
PACKAGE OUTLINE
DIP-14-300-2.54 UNIT: mm
2.54
0.25
6.40
7.62
0.1
19.4
3.51
0.46
1.50
5.083.30
15 degree
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2001.04.15
5
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