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Silan Semiconductors
REMOTE CONTROL ENCODER
DESCRIPTION
The SC5260 is a remote control encoder paired with either SC5260 or SC5272 utilizing COMS Technology. It encodes data and address pins into a serial coded waveform suitable for RF modulation. SC5260 has a maximum of 10 bits tri-state address pins providing up to 59,049 (or 310) address codes; thereby, drastically reducing any code collision and unauthorized code scanning possibilities. SC5260 is one of the first generation of Encoder/ Decoder ICs. When paired with SC5270, this encoder/decoder (SC5260/SC5270) pair can operate at very wide temperature range (see Features). Thus, this very important feature enables your Encoder/Decoder to operate under the worst environmental condition.
SC5260
SOP-16
DIP-16
FEATURES
* High Performance Technology * Low Power Consumption * Very High Noise Immunity * Wide Operating Temperature Range: -30C ~ 70C * 8 or 10 Tri-State Code Address Pins * Single Resistor Oscillator * Least External Components
APPLICATIONS
* Home/Car Security System * Garage Door Controller * Remote Fan Controller * Remote Control Toys
ODERING INFORMATION
SC5260-R4 (S) SC5260-R2 (S)
16 Pins, DIP (SO) 16 Pins, DIP (SO)
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
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BLOCK DIAGRAM
A0 A1 A2 A3 A4 A5 A6 A7 A8/D3 A9/D2 D1 D0 CODE GENERATION ADDRESS /DATA CONTROL LOGIC SYSTEM TIMING
SC5260
OSC
OSC
DOUT
PIN CONFIGURATION
A0 A1 A2 A3 A4 A5 A6 A7 1 2 3 16 VCC 15 DOUT 14 OSC A0 A1 A2 A3 A4 A5 A6 A7 1 2 3 16 VCC 15 DOUT 14 OSC
SC5260-R4
SC5260-R2
4 5 6 7 8
13 D0 12 D1 11 D2 10 D3 9 VSS
4 5 6 7 8
13 D0 12 D1 11 A9 10 A8 9 VSS
ABSOLUTE MAXIMUM RATINGS
Characteristic
Supply Voltage Input/Output Voltage Maximum Power Dissipation Operating Temperature Storage Temperature
Symbol
VCC VIN,VOUT Pa Topr Tstg
Value
-0.3 ~ +6.0 -0.3V ~ VCC+0.3V 500 -30 ~ +70 -40 ~+125
Unit
V V mW C C
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
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ELECTRICAL CHARACTERISTICS
Parameter
Supply Voltage Stand-by Current
SC5260
Test conditions
VCC=3V OSC stops All input pins open VCC=3V, VOH=1.5V VCC=6.0V, VOH=3.0V VCC=3V, VOH=1.5V VCC=6.0V, VOH=3.0V VCC=1.8V VCC=6.0V
Symbol
VCC Isb
Min
1.8 0.2 2.5 10 4.6 12 0.01 0.50
Typ
Max
6.0
Unit
V A
0.5
0.8
DOUT Output Driving Current
IOH
mA
DOUT Output Sinking Current
IOL
mA
Operation Current
Iop
mA
PIN DESCRIPTION
Pin No.
1~8
Symbol
A0~A7
I/O
I Code Address Pin Nos.0~7
Description
These eight tri-state pins ate detected by SC5260 to determine the encoded waveform bit0~bit7. Each bit can be set to "0", "1", or "f"(floating).
10~11
A8/D3~A9/D2
I/PL*
Code Address pin Nos.8~9/Data Pin Nos.3~2. These two tri-state pins are detected by SC5260 to determine the encoded waveform bit8~bit9. When these pins ate used as address pins (as in SC5260-R2), they can be set to "0", "1", or "f" (floating). When these pins are used as data pins (as in SC5260-R4), they can only be set to "0" or "1".
12~13 14
D1, D0 OSC
I/PL I
Data Pin Nos. 1~0. These pins can only be set to "0" or "1". Oscillator Pin A resistor connected between the OSC Pin and the VCC determines the fundamental frequency of the SC5260.
15
DOUT
O
Data Output Pin. The encoded waveform is serially outputted to this pin. When SC5260 is not transmitting, DOUT outputs low (VSS) voltage.
16 9
VCC VSS
Positive Power Supply Negative Power Supply
Note: PL -- Pull-low Resistor is connected internally PL* -- If those two pins are used as Data Pins (SC5260-R2), pull-low resistor is connected internally; otherwise, no pull-low resistor is connected.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
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FUNCTIONAL DESCRIPTION
SC5260
SC5260 encodes the code address and data set at A0~A7, A8/D3, A9/D2, D1 and D0 into a special waveform and outputs it to the DOUT when any of the data pins is tied to high. This waveform is fed to the RF Modulator for transmission. The transmitted radio frequency is received by the RF demodulator and reshaped into the special waveform. SC5270 (or SC5272) is then used to decode the waveform and set the corresponding output pin(s). Thus completing a remote control encoding and decoding function. 1. RF Operation 1) Code Bits A Code Bits is the basic component of the encoded waveform, and can be classified as either an AD
(Address/Data) Bit or a SYNC (Synchronous) Bit.
*Address/Data (AD) Bit Waveform
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 2 pulse cycles. Each pulse cycle has 512 oscillating clock periods. For further details, please refer to the diagram below:
Osc 1 bit = 1024 Bit "0" 128 Bit "1" 384 Bit "f" Floating
Where: = Oscillating Clock Period
128
*Synchronous (SYNC.) Bit Waveform
The Synchronous Bit Waveform is 4 bits long with 1/8 bit width pulse. Please refer to the diagram below:
1/8 bit width = 128
4 bit width = 4096 Note: 1 bit = 1024
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
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2) Code Word
SC5260
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 determined by the corresponding states of A0~A7, A8/D3, A9/D2, D1 and D0 pins at the time of transmission. When the Data Type of SC5260 is used, the address bits will decrease accordingly. For example: In the 4-Data Type where the address has eight (8) bits, the transmitting format is:
8 Address Bits
4 Data Bits
Sync. Bit
SC5260 has a maximum of ten (10) Address Bits. The following diagram shows the code bits with their corresponding pins.
First Bit Transmitted
A0
A1
A2
A3
A4
A5
A6
A7
A8/ D3
A9/ D2
D1
D0
SYNC BIT
One Complete Code Word
2 Data: 4 Data:
A0 A0
A1 A1
A2 A2
A3 A3
A4 A4
A5 A5
A6 A6
A7 A7
A8 D3
A9 D2
D1 D1
D0 D0
Sync Bit Sync Bit
The Code Bits A0~A7, A8/D3, A9/D2, D1 and D0 are determined by the states set at these pins. For example, when the A0 (Pin No.1) is set to "1" (VCC), the Code Bit A0 is synthesized as "1" bit. In the same manner, when it (A0 Pin) is set to "0" (VSS) or left floating, the Code Bit A0 is synthesized as a "0" or "f" bit respectively. When SC5260 detects "1" on any of the Data Pins, it outputs a Code Word at DOUT. If the Data Pin is still in high state ("1") the time the Code Word transmission ends, SC5260 outputs the same Code Word. Please refer to the diagram below:
DATA PIN
1 Code Word
1 Code Word 1 Code Word 1 Code Word
DOUT
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
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3) Single Resistor Oscillator
SC5260
The built-in oscillator circuitry of SC5260 allows a precision oscillator to be constructed by connecting an external resistor between OSC and VCC pins. For SC5270 (or SC5272) to decode correctly the received waveform, the oscillator frequency of SC5270 (or SC5272) must be 1/16~4 (or 1/16~1/4) times that of the transmitting SC5260. The typical oscillator frequency of SC5270, and SC5272 are shown below:
Encoder (SC5260) OSC Frequency
500
Decoder (SC5270) OSC Frequency
180
400
Frequency (KHz)
160 140
OSC Resistor = 510K Ohms
Frequency (KHz)
300 250 200 R=820K R=1M
120 100 80 60
OSC Resistor = 1.0M Ohms OSC Resistor = 1.2M Ohms OSC Resistor = 2.2M Ohms
100
R=2M
40 20 0 0 2 4 6 8 10 12
1
2
3
4
5
6
7
8
9
10
Voltage (Vcc)
Voltage (Volts)
Decoder (SC5272) OSC Frequency
1000 R=100K Frequency (KHz) R=240K 100 R=510K R=1M 10 3 6 9 Voltage 12 R=2M 15
Suggested oscillator resistor values are shown below.
SC5260 820ka 1Ma 2Ma SC5270 510ka 620ka 1.2Ma SC5272 1Ma 1.2Ma 2.2Ma
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
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OPERATION FLOWCHART
Power ON
SC5260
Stand-by Mode
NO
Data Pin(s) in HIGH State YES 1 Word of Address /Data Transmitted
NO
Data Pin(s) still in HIGH State YES
APPLICATION CIRCUIT
Vcc 10H 5p 820K 47K 5p
16
15
14
13
12
11
10
9
SC5260-R4
1 2 3 4 5 6 7 8
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
7
Silan Semiconductors
PACKAGE OUTLINE
SC5260
UNIT: mm
2.54
DIP-16-300-2.54
6.40
1.50 19.4
7.62
15 degree
3.51
0.46
SOP-16-225-1.27
0.41
3.30
5.08
0.25
UNIT: mm
1.27 10.20 9.80
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
8
1.95
6.00
3.95
5.72

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