SC5272S-M0 [ETC]
REMOTE CONTROL DECODER; 遥控解码型号: | SC5272S-M0 |
厂家: | ETC |
描述: | REMOTE CONTROL DECODER |
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 |
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
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Semiconductorsꢀ
SC5272
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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
Silan
Semiconductorsꢀ
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
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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
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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
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Silan
Semiconductorsꢀ
SC5272
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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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Silan
Semiconductorsꢀ
SC5272
ꢀ
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
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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
ꢀ
Rev: 1.0
2000.12.31ꢀ
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9
Silan
Semiconductorsꢀ
SC5272
ꢀ
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
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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
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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
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12
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