SAMHOP SM5212D

三合微科股份有限公司
SM5212D
SAMHOP Microelectronics Corp.
212 RF DECODER
DESCRIPTION
FEATURES
SM5212D is a remote control decoder paired
with SM5212E utilizing CMOS Technology. It
has 12-bit 2-state address pins providing a 2 12
address codes; thereby, drastically reducing
any code collision and unauthorized code
scanning possibilities. SM5212D is available in
several options to suit every application needs :
variable number of data output pins, latch or
momentary output type.
CMOS Technology
Low Power Consumption
Very High Noise Immunity
Up to 12 2-State Code Address Pins
Wide Range of Operating Voltage:
Vcc = 3 ~ 12 Volts
* Single Resistor Oscillator
* Available in DIP and SOP Package
*
*
*
*
*
APPLICATIONS
*
*
*
*
*
Car Security
Garage Door
Home Security/Automation System
Toys
Remote Control for Industrial Use
PIN CONFIGURATION ( DIP )
A0
1
18
Vcc
NC
1
20
NC
A1
2
17
VT
A0
2
19
Vcc
A2
3
16
OSC1
A1
3
18
VT
A3
4
15
OSC2
A2
4
17
OSC1
A4
5
14
DIN
A3
5
16
OSC2
A5
6
13
A11/D0
A4
6
15
DIN
A6
7
12
A10/D1
A5
7
14
A11/D0
A7
8
11
A9/D2
A6
8
13
A10/D1
Vss
9
10
A8/D3
A7
9
12
A9/D2
Vss
10
11
A8/D3
SM5212D
SM5212D-S
Page 1
V1.0
三合微科股份有限公司
SM5212D
SAMHOP Microelectronics Corp.
212 RF DECODER
BLOCK DIAGRAM
OSC2 OSC1
Oscillator
DIN
Buffer
Divider
Data Shift
Register
..
..
Latch Circuit
..
..
Data
Data Detector
Sync. Detector
Comparator
Comparator
Control Logic
Buffer
Transmission Gate Circuit
VT
. . . . . . . . . .
Address
VDD
Page 2
VSS
V1.0
三合微科股份有限公司
SM5212D
SAMHOP Microelectronics Corp.
212 RF DECODER
PIN DESCRIPTION
NO.
PIN NAME
I/O
1
A0
I
2
A1
I
3
A2
I
4
A3
I
Address input , each pin can be
5
A4
I
set to "0' , "1".
6
A5
I
7
A6
I
8
A7
I
9
VSS
POWER
10
D3
O
11
D2
O
FUNCTION
Negative power supply.
Address/Data output active high.
12
D1
O
13
D0
O
14
DI
I
Receive from RF module.
15
OSC1
I
16
OSC2
O
Resistor connected between
these two pins determine the
system clock.
17
VT
O
Valid transmission indication.
18
VDD
POWER
Positive power supply.
Page 3
V1.0
三合微科股份有限公司
SM5212D
SAMHOP Microelectronics Corp.
212 RF DECODER
Decoder with Data Output Pins
After Power On SM5212D is set in
Power On
Address search mode, if SM5212D finds
3 consecutive Address that matches the
Standby Mode
Address setting of SM5212D.
SM5038RF will enter Data Compare
NO
Code In?
Disable VT &
ignore the rest
of this word
YES
Address Bits
Matched?
mode. It will compare perviously 3
received data, if they match then
SM5212D will set VT high and send data
NO
O/P.
YES
Store Data
Match
previous stored
data?
NO
YES
NO
3 times
of checking
completed ?
YES
Latch data to
output &
activate VT
NO
Address or
data error?
YES
Page 4
V1.0
三合微科股份有限公司
SM5212D
SAMHOP Microelectronics Corp.
212 RF DECODER
Single Resistor Oscillator
SM5212D's oscillator can be constructed by connecting a resistor between OSC1 and OSC2
pin.
Encoder OSC Frequency
KHz
350
300
43K
51K
250
68K
200
82K
100K
150
150K
180K
100
50
0
3
4
5
6
7
8
9
10
11
12
VOLTAGE
~ FOSCD (SM5212E
The recommended oscillator frequency is FOSCD (SM5212D decoder)=10
encoder)
Page 5
V1.0
三合微科股份有限公司
SM5212D
SAMHOP Microelectronics Corp.
212 RF DECODER
ABSOLUTE MAXIMUM RATINGS
Ratings
Unit
VI - Vss
-0.3~13
V
Vss - VDD
Vss-0.3~VDD+0.3
V
Operating Temperature
Topr
-20~75
oC
Storage Temperature
Tstg
-50~125
oC
Parameter
Supply Voltage
Input Voltage
Conditions
Symbol
VDD - Vss = 12V
DC ELECTRICAL CHARACTERISTICS
(Ta=25 oC)
PARAMETER
SYMBOL
Operating Voltage
VDD
Standby Current
ISTB
CONDITIONS
LIMIT
UNIT
MIN.
TYP.
MAX.
2.4
5
12
VDD=5V OSC stop
-
0.1
1
VDD=12V OSC stop
-
2
4
µA
µA
V
Operating Current
IDD
VDD=5V No load
Fosc=150kHz
-
200
400
µA
Data Output Source
Current (D8~D11)
IO
VDD=5V
VOH=4.5V
-1
-1.6
-
mA
Data Output Sink
Current (D8~D11)
IO
VDD=5V
VOL=0.5V
1
1.6
-
mA
IVT
VDD=5V VOH=4.5V
VDD=5V VOL=0.5V
-1
-1.6
-
mA
1
1.6
-
mA
VT Output Source Current
VT Output Sink Current
"H" Input Voltage
VIH
- (VDD=5V)
3.5
-
5
V
"L" Input Voltage
VIL
- (VDD=5V)
0
-
1
V
-
150
-
kHz
Oscillator Frequency
FOCS
VDD=5V
ROSC=51k Ω
Page 6
V1.0
三合微科股份有限公司
SM5212D
SAMHOP Microelectronics Corp.
212 RF DECODER
APPLICATION CIRCUIT
RF
Receiver
VDD
A0
VDD
A1
VT
A2
OSC1
A3
OSC2
A4
DIN
A5
D0
A6
D1
A7
D2
VSS
D3
VT
ROSC
SM5212D
Page 7
V1.0
三合微科股份有限公司
SM5212D
SAMHOP Microelectronics Corp.
212 RF DECODER
ORDERING INFORMATION
Part NO.
Package
SM5212D
18Pin DIP
Part NO.
Package
SM5212D-S
20Pin SOP
Logo
Product No.
D:DIP TYPE
D-S:SO Package
SM5212 XX
xxx xx
Serial Number
Date Code
ESD Protection Mark
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V1.0