三合微科股½有限公司
S
AM
H
OP
Microelectronics Corp.
SM5262B
3
12
RF ENCODER
GENERAL DESCRIPTION
The SM5262B is a RF remote control
encoder paired with SM5272B. It utilizes
CMOS technology. The chip has 12 bits
of 3-state address pins that provides 3
12
codes. SM5262B/ SM5272B pair is
suitable for use on remote controller.
FEATURES
* CMOS technology
* Low power consumption
* 12 tri-state pins
* Wide range operating voltage, Vcc = 2.5-12V
* Up to six data bits
* High noise immunity
APPLICATIONS
* Garage Door
* Ceiling Fan
* Toys
PIN ASSIGNMENTS
A0
A1
A2
A3
A4
A5
A6/D5
A7/D4
Vss
1
2
3
4
5
6
7
8
9
SM5262B
18
17
16
15
14
13
12
11
10
V
DD
Dout
OSC1
OSC2
TE
A11/D0
A10/D1
A9/D2
A8/D3
A0
A1
A2
A3
A4
A5
A6/D5
A7/D4
Vss
NC
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
DD
Dout
OSC1
OSC2
TE
A11/D0
A10/D1
A9/D2
A8/D3
NC
SM5262BS
Page 1
OCT. 2001
三合微科股½有限公司
S
AM
H
OP
Microelectronics Corp.
SM5262B
3
12
RF ENCODER
A0
A1
A2
A3
A4
A5
A6/D5
A7/D4
Vss
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
V
DD
Dout
OSC1
OSC2
LED
A11/D0
A10/D1
A9/D2
A8/D3
A0
A1
A2
A3
A4
A5
A6/D5
A7/D4
Vss
NC
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
DD
Dout
OSC1
OSC2
LED
A11/D0
A10/D1
A9/D2
A8/D3
NC
SM5262B-DX
SM5262BS-DX
BLOCK DIAGRAM
Vss
VDD
OSC2
System Timing Generator
A0
A1
A2
A3
A4
A5
A6/D5
A7/D4
A8/D3
A9/D2
A10/D1
A11/D0
OSC
OSC1
Control Logic
Address
TE
LED
Code Generator
Output
Driver
Dout
Page 2
OCT. 2001
三合微科股½有限公司
S
AM
H
OP
Microelectronics Corp.
SM5262B
3
12
RF ENCODER
PIN FUNCTION
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LED
15
16
17
18
OSC1
OSC2
Dout
VDD
O
I
O
O
POWER
LED Output.
Resistor connected between these two pins
determine the system clock.
Serial output of encoded signals.
Positive power supply.
Pin Name
A0
A1
A2
A3
A4
A5
A6/D5
A7/D4
VSS
A8/D3
A9/D2
A10/D1
A11/D0
TE
I/O
I
I
I
I
I
I
I/O
Address input or data output.
I/O
POWER
I/O
I/O
Address input or data output.
I/O
I/O
I
Enables transmission.
Negative power supply.
Address input, each pin can be set to "0",
"1" , or floating.
Function Operation
Page 3
OCT. 2001
三合微科股½有限公司
S
AM
H
OP
Microelectronics Corp.
SM5262B
3
12
RF ENCODER
FUNCTION DESCRIPTION
1.
Data Format
OSC
BIT "0"
*a
BIT "1"
3a
a
BIT "F"
*a is 4 OSC Clock
TE
Dout
12 bits address
Sync.
Synchronisation Bit waveform is :
a
32a
Page 4
OCT. 2001
三合微科股½有限公司
S
AM
H
OP
Microelectronics Corp.
SM5262B
3
12
RF ENCODER
2. Frame Format
When SM5262B is used for no data, transmitting format is :
12 bits address
Sync.
Synchronisation Bit waveform is :
a
32a
When data type of SM5262B is used, address bits will decrease accordingly. For example,
in 3 data type where address is 9 bits, transmitting format is :
9 address bits
3 data bits
Sync.
SM5262B/ SM5272B has 12 bits including a maximum of 6 data bits.
first transmission bit
in real signal A0 will be receive first.
A0
A0
A0
A0
A0
A0
A0
A1
A1
A1
A1
A1
A1
A1
A2
A2
A2
A2
A2
A2
A2
A3
A3
A3
A3
A3
A3
A3
A4
A4
A4
A4
A4
A4
A4
A5
A5
A5
A5
A5
A5
A5
A6
A6
A6
A6
A6
A6
D5
A7
A7
A7
A7
A7
D4
D4
A8
A8
A8
A8
D3
D3
D3
A9 A10 A11
A9 A10 A11
A9
D2
D2
D2
D2
D1
D1
D1
D1
D1
D0
D0
D0
D0
D0
Sync.
Sync.
Sync.
Sync.
Sync.
Sync.
Sync.
According to
SM5272B
SM5272B-M2/L2
SM5272B-M3/L3
SM5272B-M4/L4
SM5272B-M5/L5
SM5272B-M6/L6
Page 5
OCT. 2001
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