Page 1
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.
PIN ASSIGNMENTS
GENERAL DESCRIPTION
APPLICATIONS
* Garage Door
* Ceiling Fan
* Toys
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
OCT. 2001
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
A0
A1
A2
A3
A4
A5
A6/D5
A7/D4
Vss
V
DD
Dout
OSC1
OSC2
TE
A11/D0
A10/D1
A9/D2
A8/D3
SM5262B
SM5262BS
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
A0
A1
A2
A3
A4
A5
A6/D5
A7/D4
Vss
NC
V
DD
Dout
OSC1
OSC2
TE
A11/D0
A10/D1
A9/D2
A8/D3
NC
SM5262B
3
12
RF ENCODER
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Microelectronics Corp.
Page 2
BLOCK DIAGRAM
OCT. 2001
Code Generator
Address
Control Logic
System Timing Generator
LED
Output
Driver
TE
OSC
OSC1
OSC2
A0
A11/D0
A1
A2
A3
A4
A5
A6/D5
A7/D4
A8/D3
A9/D2
A10/D1
Dout
Vss
VDD
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
A0
A1
A2
A3
A4
A5
A6/D5
A7/D4
Vss
V
DD
Dout
OSC1
OSC2
LED
A11/D0
A10/D1
A9/D2
A8/D3
SM5262B-DX
SM5262BS-DX
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
A0
A1
A2
A3
A4
A5
A6/D5
A7/D4
Vss
NC
V
DD
Dout
OSC1
OSC2
LED
A11/D0
A10/D1
A9/D2
A8/D3
NC
SM5262B
3
12
RF ENCODER
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Page 3
OCT. 2001
PIN FUNCTION
No.
1
2
3
4
5
6
7
Pin Name
A0
A1
A2
A3
A4
A5
A6/D5
I/O
I
I
I
I
I
I
I/O
Function Operation
Address input, each pin can be set to "0",
"1" , or floating.
Address input or data output.
Negative power supply.
Address input or data output.
8
9
10
A7/D4
VSS
A8/D3
I/O
POWER
I/O
11
12
A9/D2
A10/D1
I/O
I/O
13
A11/D0
I/O
14
15
OSC1
I
Resistor connected between these two pins
determine the system clock.
16
OSC2
O
17
Dout
O
Serial output of encoded signals.
18
VDD
POWER
Positive power supply.
TE
I
Enables transmission.
LED
O
LED Output.
SM5262B
3
12
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FUNCTION DESCRIPTION
1. Data Format
Page 4
OCT. 2001
OSC
BIT "F"
BIT "1"
*a
3a
BIT "0"
TE
Dout
Synchronisation Bit waveform is :
*a is 4 OSC Clock
a
32a
12 bits address
Sync.
a
SM5262B
3
12
RF ENCODER
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Page 5
2. Frame Format
OCT. 2001
When SM5262B is used for no data, transmitting format is :
Synchronisation Bit waveform is :
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 :
SM5262B/ SM5272B has 12 bits including a maximum of 6 data bits.
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9 A10 A11
Sync.
According to
first transmission bit
in real signal A0 will be receive first.
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9 A10 A11 Sync.
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9 D1
D0
Sync.
A0
A1
A2
A3
A4
A5
A6
A7
A8 D2 D1
D0
Sync.
A0
A1
A2
A3
A4
A5
A6
A7 D3 D2 D1
D0
Sync.
A0
A1
A2
A3
A4
A5 D5 D4 D3 D2 D1
D0
Sync.
A0
A1
A2
A3
A4
A5
A6 D4 D3 D2 D1
D0
Sync.
SM5272B
SM5272B-M2/L2
SM5272B-M4/L4
SM5272B-M5/L5
SM5272B-M6/L6
SM5272B-M3/L3
a
32a
12 bits address
Sync.
9 address bits
Sync.
3 data bits
SM5262B
3
12
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VOLTAGE
R = 100 K
R = 300 K
R = 620 K
R = 680 K
R = 820 K
R = 1.0 M
300
0
6
9
200
100
50
250
2.5
180
KHz
R = 510K
R = 1.2 M
R = 2.7 M
R = 3.0 M
R = 3.3 M
R = 4.3 M
100
KHz
0
6
9
12
15 VOLTAGE
90
80
70
60
50
40
30
20
10
2.5
Page 6
OCT. 2001
Single Resistor Oscillator
SM5262B's oscillator be constructed by connecting a resistor between OSC1 and OSC2 pin.
SM5272B's OSC frequency must be 1.4 to 6.8 times more than SM5262B.
Encoder OSC Frequency
SM5262B
3
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Decoder OSC Frequency
Suggested oscillator resistor of SM5262B/ SM5272B:
SM5262B
SM5272B
4.7M OHM
750K OHM
3.0M OHM
390K OHM
2.2M OHM
270K OHM
1.2M OHM
160K OHM
Page 7
OCT. 2001
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
Conditions
V
DD
- Vss = 12 V
Ratings
-0.3 ~ 16
Vss - 0.3 ~ V
DD
+0.3
-20 ~ 70
-40 ~ 125
Vss - 0.3 ~ V
DD
+0.3
500
Unit
V
V
V
mW
Parameter
Supply Voltage
Input Voltage
Operating Temperature
Storage Temperature
Output Voltage
Maximum power dissipation
Symbol
V
DD
- Vss
V
I
- Vss
Topr
Tstg
V
O
- Vss
Pa
Parameter
Conditions
Unit
Limit
Symbol
Min. Typ. Max.
Supply Voltage
V
V
CC
2.5
12
Output Drive Current (Dout)
V
DD
= 5V V
OH
= 4V
V
DD
= 8V V
OH
= 6.4V
V
DD
= 12V V
OH
= 9.6V
mA
I
OH
- 2
- 8
-16
Output Sinking Current (Dout)
V
DD
= 5V V
OL
= 1V
V
DD
= 8V V
OL
= 1.6V
V
DD
= 12V V
OL
= 2.4V
mA
I
OL
7
16
29
Standby Current
V
DD
=12V OSC stop
AO - A11 open
I
STB
A
0.02
0.3
SM5262B
3
12
RF ENCODER
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Microelectronics Corp.
Page8
OCT. 2001
APPLICATION CIRCUIT
Vss
A0
A1
A2
A3
A4
A5
A6
A7
V
DD
Dout
OSC1
OSC2
TE
A11
A10
A9
A8
SM5262B
VDD
DI
ROSC
RF
TEB
V
DD
GND
RF : Module reference to Page11
Vss
A0
A1
A2
A3
A4
A5
A6
A7
V
DD
Dout
OSC1
OSC2
TE
A11
A10
A9
A8
SM5262B
VDD
ROSC
TEB
DI
RF
V
DD
GND
ANT
ANT
SM5262B
3
12
RF ENCODER
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APPLICATION CIRCUIT
VDD
Vss
A0
A1
A2
A3
A4
A5
D5
D4
V
DD
Dout
OSC1
OSC2
TE
D0
D1
D2
D3
SM5262B
ROSC
DI
RF
ANT
V
D
D
GND
10K
*6
D0
D1
D2
D3
D4
D5
D4
D1
D2
D3
D5
To SM5262B
Page 9
OCT. 2001
D0
SM5262B
3
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RF ENCODER
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Microelectronics Corp.
Page 10
OCT. 2001
APPLICATION CIRCUIT
Vss
A0
A1
A2
A3
A4
A5
D5
D4
V
DD
Dout
OSC1
OSC2
LED
D0
D1
D2
D3
SM5262B - DX
ROSC
DI
RF
ANT
V
DD
GND
VDD
D4
D1
D2
D3
D5
D5
D4
D3
D2
D1
D0
To
SM5262B
D0
SM5262B
3
12
RF ENCODER
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Microelectronics Corp.
APPLICATION CIRCIUT
Page 11
OCT. 2001
VDD
25P
47K
MPSH10
5P
10
H
From
Encoder's O/P
SM5262B
3
12
RF ENCODER
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Microelectronics Corp.
ORDERING INFORMATION
Part No.
Package
SM5262B
18 Pin DIP
Part No.
Package
SM5262BS
20 Pin SOP
SM5262B
S - DX
Logo
Product No.
Empty: DIP TYPE
S: SO Package
General Type
D2: Two data output type
D3: Three data output type
D4: Four data output type
Page 12
OCT. 2001
SM5262B
3
12
RF ENCODER
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AM
H
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Microelectronics Corp.
Date Code
Serial Number
ESD Protection Mark
xxx xx
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