Document
SM5262B
SAMHOP Microelectronics Corp.
312 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 312 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
VDD 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
VDD Dout OSC1 OSC2 TE A11/D0 A10/D1 A9/D2 A8/D3 NC
SM5262BS
Page 1
OCT. 2001
SM5262B
SAMHOP Microelectronics Corp.
312 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
VDD 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
VDD 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
SM5262B
SAMHOP Microelectronics Corp.
312 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
SM5262B
SAMHOP Microelectronics Corp.
312 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
SM5262B
SAMHOP Microelectronics Corp.
312 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.