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: -30°C ~ 70°C
* 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
1
Silan
Semiconductors
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 V
CC
15 DOUT
14 OSC
A0
A1
A2
A3
A4
A5
A6
A7
1
2
3
16 V
CC
15 DOUT
14 OSC
SC5260-R4
SC5260-R2
4
5
6
7
8
13 D0
12 D1
11 D2
10 D3
9
V
SS
4
5
6
7
8
13 D0
12 D1
11 A9
10 A8
9
V
SS
ABSOLUTE MAXIMUM RATINGS
Characteristic
Supply Voltage
Input/Output Voltage
Maximum Power Dissipation
Operating Temperature
Storage Temperature
Symbol
V
CC
V
IN
,V
OUT
P
a
Topr
Tstg
Value
-0.3 ~ +6.0
-0.3V ~ V
CC
+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
2
Silan
Semiconductors
ELECTRICAL CHARACTERISTICS
Parameter
Supply Voltage
Stand-by Current
SC5260
Test conditions
V
CC
=3V OSC stops
All input pins open
V
CC
=3V, V
OH
=1.5V
V
CC
=6.0V, V
OH
=3.0V
V
CC
=3V, V
OH
=1.5V
V
CC
=6.0V, V
OH
=3.0V
V
CC
=1.8V
V
CC
=6.0V
Symbol
V
CC
I
sb
Min
1.8
0.2
2.5
10
4.6
12
0.01
0.50
Typ
Max
6.0
Unit
V
µA
0.5
0.8
DOUT Output Driving Current
I
OH
mA
DOUT Output Sinking Current
I
OL
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
3
Silan
Semiconductors
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:
α
= 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
4
Silan
Semiconductors
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
5
嵌入式系统
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