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SC5272S-L3 [ETC]

REMOTE CONTROL DECODER; 遥控解码
SC5272S-L3
型号： SC5272S-L3
厂家： ETC    ETC
描述：

REMOTE CONTROL DECODER
遥控解码

遥控 远程控制
文件： 总12页 (文件大小：180K)
中文：  中文翻译
下载：  下载PDF数据表文档文件
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Silan  
Semiconductorsꢀ  
SC5272  
ꢀ
REMOTE CONTROL DECODER  
DESCRIPTION  
The SC5272 is a remote control decoder paired with SC5262  
utilizing CMOS technology. It has a maximum of 12-bits of tri-state  
address pins providing up to 531,441(or 3 ) address codes;  
DIP-18  
12  
thereby, drastically reducing any code collision and unauthorized  
code scanning possibilities.  
SOP-20  
FEATURES  
* Low power consumption and very high noise immunity  
* Up to 12 tri-state code address pins or 6 data pins  
* Wide operating voltage range(Vcc=3V ~ 15V)  
* Single resistor oscillator  
* Latch or Momentary output type  
DIP-20  
APPLICATION  
* Home/automation security system  
* Remote control toys or for industrial use  
* Remote control fan  
* Garage door controller  
ORDERING INFORMATION  
SC5272X-XX  
Data Bits:  
0: 0 data bit(can be omitted)  
2: 2 data bits  
3: 3 data bits  
4: 4 data bits  
5: 5 data bits  
6: 6 data bits  
L: Latch Type  
M: Momentary Type  
S: SOP-20 Package  
D: DIP-20 Package  
Omitted: DIP-18 Package  
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD  
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Rev: 1.0  
2000.12.31ꢀ  
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1
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PIN CONFIGURATION  
A0  
A1  
A2  
A3  
A4  
A5  
A6  
A7  
Vss  
NC  
Vcc  
VT  
A0  
A1  
A2  
A3  
A4  
A5  
A6  
A7  
Vss  
NC  
Vcc  
VT  
1
1
1
1
1
1
OSC1  
OSC2  
Din  
OSC1  
OSC2  
Din  
A11  
A10  
A9  
D0  
D1  
A9  
A8  
A8  
NC  
NC  
A0  
A1  
A2  
A3  
A4  
A5  
A6  
A7  
Vss  
NC  
Vcc  
VT  
A0  
A1  
A2  
A3  
A4  
A5  
A6  
A7  
Vss  
NC  
Vcc  
VT  
OSC1  
OSC2  
Din  
OSC1  
OSC2  
Din  
18 Pin  
Package  
20 Pin  
Package  
D0  
D0  
D1  
D1  
D2  
D2  
A8  
D3  
NC  
NC  
A0  
A1  
A2  
A3  
A4  
A5  
A6  
D4  
Vss  
NC  
Vcc  
VT  
A0  
A1  
A2  
A3  
A4  
A5  
D5  
D4  
Vss  
NC  
Vcc  
VT  
OSC1  
OSC2  
Din  
OSC1  
OSC2  
Din  
D0  
D0  
D1  
D1  
D2  
D2  
D3  
D3  
NC  
NC  
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD  
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Rev: 1.0  
2000.12.31ꢀ  
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2
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SC5272  
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BLOCK DIAGRAM  
OSC2 OSC1  
VT  
17  
15  
16  
18  
9
Output Logic  
Vcc  
Vss  
OSC  
Sync.  
Detect  
System  
Timing  
Control  
Logic  
Compare  
Logic  
Data  
Detect  
Tri-stateAddress Data Detect  
1
2
3
4
5
6
7
8
10 11 12 13  
14  
Din  
A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11  
The Pin configurations are for DIP-18 package and are also some different with the SC5272 suffix  
(please refer to the Pin Configuration)  
ABSOLUTE MAXIMUM RATINGS  
(Ta=25°C )  
Characteristic  
Supply Voltage  
Symbol  
Value  
-0.3 ~ 16.0  
-0.3 ~ Vcc+0.3  
-0.3 ~ Vcc+0.3  
300  
Unit  
V
Vcc  
Vi  
Input Voltage  
V
Output Voltage  
Vo  
V
Maximum Power Dissipation(Vcc=12V)  
Operating Temperature  
Storage Temperature  
Pa  
mW  
°C  
°C  
Topr  
Tstg  
-20 ~ +70  
-40 ~ +125  
ꢀ
ELECTRICAL CHARACTERISTICS  
(Ta=25°C,Vcc=12V,unless otherwise specified)  
Characteristic  
Supply Voltage  
Symbol  
Vcc  
Test Condition  
Min Typ. Max Unit  
3
15  
V
Supply Current  
Icc  
Vcc=12V,OSC stops  
A0~ A11 Open  
0.02  
0.3  
µA  
Vcc=5V,VOH=3V  
Vcc=8V,VOH=4V  
Vcc=12V,VOH=6V  
Vcc=5V,VOL=3V  
Vcc=8V,VOL=4V  
Vcc=12V,VOL=6V  
-3  
mA  
mA  
mA  
mA  
mA  
mA  
V
Dout Output driving Current  
Dout Output sinking Current  
IOH  
-6  
-10  
2
IOL  
5
9
0.7Vcc  
0
Input High Voltage  
Input Low Voltage  
VIH  
VIL  
Vcc  
0.3Vcc  
V
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD  
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Rev: 1.0  
2000.12.31ꢀ  
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Semiconductorsꢀ  
SC5272  
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PIN DESCRIPTION  
Pin No.  
Pin Name  
I/O  
Description  
18 PIN  
20 PIN  
Code Address pins No. 0~5. These six tri-state pins are  
detected by SC5272 to determine the encoded waveform bit  
0 ~bit 5. Each pin can be set to “0”,”1”,”f”(floating).  
Code Address pins No.6~11/data pins No.5~0. These six  
pins are used higher address input bits or data output pins  
depending on the versions of SC5272 used.When these  
pins are used as address pins, they are tri-state input pins  
and can be set to “0”,”1”,”f”.When they are used as output  
pins, they are driven to Vcc if (1) the address decoded from  
the waveform that was received matches the address setting  
at address input pins, and (2) the corresponding data bits  
received is a “1” bits. Otherwise, they are driven to Vss.  
Data Input Pin. The encode waveform received is serially fed  
to SC5272 at this pin.  
1~6  
1~6  
A0~A5  
I
7~8  
10~13  
7~8  
12~15  
A6/D5~A11/D0  
I/O  
14  
16  
DIN  
I
A resistor connected between  
these two pins determine the  
fundamental frequency of SC5272.  
15  
16  
17  
18  
OSC1  
OSC2  
I
Oscillator pin 1  
O
Oscillator pin 2  
Valid Transmission. Active high signal. VT in high state  
signifies that SC5272 receives valid transmission waveform.  
Positive Power Supply  
Negative Power Supply  
No Connection  
17  
19  
VT  
O
18  
9
--  
20  
9
10~11  
Vcc  
Vss  
NC  
--  
--  
--  
FUNCTIONAL DESCRIPTION  
The SC5272 decodes the waveform received and fed into the Din pin. The waveform is decoded into code word  
that contains the address, data and Sync bits. The decoded address bits are compared with the address set at the  
address input pins. If both addresses match for 2 consecutive code words, SC5272 drives:  
a). The data output pins whose corresponding data bits is then decoded to be a "1" bit  
b). The VT output --to high voltage (high state).  
1. RF OPERATION  
Code Bits  
A code bit is the basic component of the encoded waveform, and can be classified as either an AD(Address/Data)  
Bit or a SYNC(Synchronous) Bit.  
An AD bit can be designated as bit “ 0 ”, “ 1 ” or “ f ” if it is in low, high or floating state respectively. One bit  
waveform consists of two pulse cycles. Each pulse cycle has 16 oscillating time periods. For further details, please  
refer to the diagram below:  
32a  
a
OSC  
bit "0"  
12a  
4a  
4a  
bit "1"  
12a  
bit "f"  
Where: a = oscillating clock period . Bit “ f ” is only available for address bits.  
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD  
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Rev: 1.0  
2000.12.31ꢀ  
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Silan  
Semiconductorsꢀ  
SC5272  
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The Synchronous bit waveform is 4 bits long with 1/8 bit width pulse. Please refer to the diagram below:  
1/8 bit width=4a  
4 bit width=128a  
Note: 1bit =32a  
Code word  
A group of Code Bits is called a Code Word. A Code Word consists of 12 AD bits followed by one Sync. Bit. The  
12 AD bits are interpreted as either address or data bits depending on the SC5272 version used. Please refer to  
the diagram below:  
A0  
A1  
A2  
A3  
A4  
A5  
A6  
A7  
A8  
A9  
A10  
A11  
SYNC  
Single Resistor Oscillator  
The Build-in oscillator circuitry of SC5272 allows a precision oscillator to be constructed by connecting an  
external resistor between OSC1 and OSC2 pins. For SC5272 to decode correctly the received waveform, the  
oscillator frequency of SC5272 must be 2.5 ~8 times that of transmitting SC5262. It is a good practice to center the  
SC5272 oscillator frequency in the window to gain best window margin at both sides. The typical oscillator  
frequency with various resistor values for both SC5262 and SC5272 are shown below:  
Encoder OSC Frequency  
Decoder OSC Frequency  
100  
1000  
100  
R=510kΩ  
R=1MΩ  
R=100kΩ  
R=240kΩ  
R=2MΩ  
R=510kΩ  
R=1MΩ  
R=3.3MΩ  
10  
R=4.7MΩ  
R=2MΩ  
10  
1
1
0
3
6
9
12  
15  
0
3
6
9
12  
15  
Supply Voltage (V)  
Supply Voltage (V)  
Suggested Oscillator resistor values are shown below:  
SC5262  
4.7MΩ  
3.3MΩ  
1.2MΩ  
SC5272  
820kΩ  
680kΩ  
200kΩ  
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD  
ꢀ
Rev: 1.0  
2000.12.31ꢀ  
ꢀ
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Silan  
Semiconductorsꢀ  
SC5272  
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2. IR OPERATION  
In the IR Type of operation, the functions are similar to the above descriptions except that the output waveform  
carried by SC5262-IR has a frequency of 38kHz. Details are as follows.  
Code Bits  
The Code Bits are further modulated with a 38kHz carrier frequency and can be”0”,”1” or “ f ” bit. Their waveform  
are shown below:  
160λ  
OSC  
20λ  
"0"  
60λ  
"1"  
"f"  
620λ  
Sync  
Note:λ=2 clock lengths  
Code Word  
A Code Word is made up of code bits and the format is the same as that of the RF Code Word.  
Code Frame  
Likewise, a Code Frame is made up of Code Words and the format is the same as that of RF type of operation.  
Oscillator  
The SC5262-IR is specially designed for infrared remote control applications and its output waveform carries  
38kHz frequency. To get the 38kHz carrier frequency at the data output, the oscillator frequency must be 76kHz.  
A 440kΩ resistor connected between OSC1 and OSC2 pins of SC5262-IR is recommended. Moreover, for a  
matching decoder frequency, 1MΩ resistor connected between the OSC1 and OSC2 pins of SC5272 is also  
recommended.  
3.VALID TRANSMISSION  
When the SC5272 receives a transmission code word, it initially checks whether this is a valid transmission. For  
a transmission to be valid, (1) it must be a complete code word, and (2) the address bits must match the address  
setting at the address pins. After two consecutive valid transmission, SC5272 (1) drives the data pins according to  
the data bits received, and (2) rise VT to high voltage(high state).  
The timings are shown in the following diagram.  
Sync bit  
Sync bit  
1st word  
2nd word  
Ta  
Din  
Data pins  
Tc  
(momentary)  
Tb  
VT  
Ta= 8 OSC clock width  
Tb= 1 OSC clock width  
Tc=2 code word width  
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD  
ꢀ
Rev: 1.0  
2000.12.31ꢀ  
ꢀ
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Silan  
Semiconductorsꢀ  
SC5272  
ꢀ
4.LATCH OR MOMENTARY DATA OUTPUT TYPE  
The SC5272 uses either the latch or momentary data output type depending on the SC5272 version used. The  
latch type SC5272-LXactivates the data out during transmission and this data is sustained in the memory until  
another data is inputted or entered. A momentary type(SC5272-MXon the other hand, activates the data out only  
during transmission. In the momentary type, the data does not remain in the memory after the transmission is  
completed. Please refer to the diagram below:  
Data Words  
Data Words  
Din  
T
T
Data Pins  
(Momentary)  
Data Output X  
Data Output Y  
Data Output Y  
Data Pins  
(Latch)  
Data Output X  
VT  
OPERATION FLOW CHART  
Decoder Without Data Output Pin  
1. When the power is turned on, the SC5272 activates the Stand-By Mode.  
2. It then search for signals, If there is no signal received, it remains in the Stand-By Mode; otherwise, the address  
bits received are compared with the address configuration of the pins.  
3. The VT goes high signifying the validation of transmission only when there are two continuous frames that  
contain matched address bit; otherwise, VT will not be activated and the Stand-By Mode remains active.  
4. Then , the address bits are again checked. Two continuous mismatches of the address bits would disable the VT  
and make the Stand-By Mode active; otherwise, the address bits are continuous checked.  
Power ON  
Stand-By Mode  
No  
Singal IN ?  
Yes  
Disable VT  
Address bits  
match?  
No  
No  
Yes  
Address bits  
match?  
Yes  
Activate VT  
Address bits  
still match?  
Yes  
Yes  
No  
Address bits  
still match?  
No  
Decoder Without Data Output Pin  
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD  
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Rev: 1.0  
2000.12.31ꢀ  
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SC5272  
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Decoder With Data Output Pins  
1. When the power is turned on ,the SC5272 activates the Stand-By Mode.  
2. It then searches for signal. If there is no signal received , it remains in the Stand-By Mode; otherwise, the  
address bits are compared with the address configuration of the pins.  
3. Whenever the address bits in frame match with that of the address configuration of the pin, the data bits are  
stored into memory. Also, when this IC finds two continuous and identical data having the same address bits, the  
data outputs is activated and the VT is enabled. The VT is disabled when there are two continuous mismatched  
addresses. For the momentary type, the data output is reset; while for the latch type, the data output is sustained.  
Power ON  
Stand-By Mode  
Disable VT &  
Reset output Data  
( for Momentary Type)  
Disable VT &  
Sustain output data  
(For Latch Type)  
No  
Singal IN ?  
Yes  
Address bits  
match?  
No  
Yes  
Address bits  
match?  
No  
Yes  
Activate VT  
Address bits  
still match?  
Yes  
Yes  
No  
Address bits  
still match?  
No  
Decoder With Data Output Pins  
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD  
ꢀ
Rev: 1.0  
2000.12.31ꢀ  
ꢀ
8
Silan  
Semiconductorsꢀ  
SC5272  
ꢀ
TYPICAL APPLICATION CIRCUIT  
Ω
4 7 k  
Ω
1 0 M  
1 6 F V µ / 1  
1 6 F V µ / 1  
Ω
1 5 k  
1 N 4 1 4 8  
Ω
4 7 k  
F µ 0 0 0 1 .  
F µ 0 0 0 1 .  
Ω
4 7 k  
F µ 3 3 .  
7 p F  
Ω 2 k 2 .  
F µ 0 0 0 1 . F µ 0 0 0 1 .  
Ω
1 0 0  
Ω 5 k 1 .  
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD  
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Rev: 1.0  
2000.12.31ꢀ  
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9
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Semiconductorsꢀ  
SC5272  
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Vcc=+5V  
1
2
3
4
5
6
7
8
9
18  
17  
16  
15  
14  
13  
12  
11  
10  
From "A" point of the  
receiving Block  
560Ω x 5  
LED x 5  
SC5272-L4(4 Data) RF Application Circuit  
ꢀ
ꢀ
Vcc=+5V  
1
18  
17  
16  
15  
14  
13  
12  
11  
10  
2
3
4
5
6
7
8
9
560Ω x 5  
IR Receiver  
LED x 5  
SC5272-L4(4 Data) IR Application Circuit  
ꢀ
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD  
ꢀ
Rev: 1.0  
2000.12.31ꢀ  
ꢀ
10  
Silan  
Semiconductorsꢀ  
SC5272  
ꢀ
PACKAGE OUTLINE  
DIP-18-300-2.54  
UNIT:mm  
2.54  
1.50  
15 degree  
22.95  
0.46  
DIP-20-300-2.54  
UNIT:mm  
2.54  
1.50  
15 degree  
22.95  
0.46  
ꢀ
ꢀ
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD  
ꢀ
Rev: 1.0  
2000.12.31ꢀ  
ꢀ
11  
Silan  
Semiconductorsꢀ  
SC5272  
ꢀ
ꢀ
ꢀ
SOP-20-225-1.27  
UNIT:mm  
1.27  
0.41  
18.02  
17.62  
ꢀ
ꢀ
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD  
ꢀ
Rev: 1.0  
2000.12.31ꢀ  
ꢀ
12  

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