SM5272B-2 SAMHOP [SamHop Microelectronics Corp.], SM5272B-2 Datasheet - Page 6

• Manufacturer Part Number: SM5272B-2
• Description: 3 RF DECODER
• Manufacturer: SAMHOP [SamHop Microelectronics Corp.]

Valid Transmission
After Power On SM5272B enters the Search Address mode, if SM5272B finds 2 consecutive
Address that matches the Address Pin setting of SM5272B then it will set VT high.
If VT is set high, SM5272B is still in search Address. After 2 consecutive Address that do not
match the setting on SM5272B, SM5272B will disable VT.
Latch or Momentary Data Output Type
After Power On SM5272B is set in Address search mode, if SM5272B finds 2 consecutive
Address that matches the Address setting of SM5272B. SM5272B will enter Data Compare
mode. It will compare perviously 2 receive data, if they match each then SM5272B will set VT
high and send data O/P.
SM5272B re-enters Address search mode, after 2 consecutive Address that do not match the
setting on SM5272B will disable VT and momentary's data but keep Latch's data intact.
DATA PINS
DATA PINS
(Momentary)
(Latch)
三合微科股份有限公司
S
DIN
DIN
VT
AM
VT
The timing are shown in the following diagram.
H
OP
Microelectronics Corp.
1st Address
DATA WORDS
DATA OUTPUT X
DATA OUTPUT X
T= 2 CODE WORD WIDTH
S
T
Page 6
2nd Address
S
DATA WORDS
DATA OUTPUT Y
3
DATA OUTPUT Y
12
RF DECODER
SM5272B
OCT. 26, 2001
T