2
12
Series of Decoders
Decoder timing
E n c o d e r
T r a n s m is s io n
E n a b le
E n c o d e r
D O U T
4 w o rd s
2
D e c o d e r V T
c h e c k
L a tc h e d
D a ta O u t
c h e c k
1 4
< 1 w o rd
c lo c k s
T r a n s m itte d
C o n tin u o u s ly
4 w o rd s
2
1 4
c lo c k s
Encoder/Decoder cross reference table
Decoders
Part No.
Package
Data Pins
Address Pins
VT Pair Encoder
HT12A
HT12E
HT12A
HT12E
Encoder
DIP
4
0
8
12
Ö
Ö
18
18
18
18
SOP
20
20
20
20
Decoder
DIP
18
18
SOP
20
20
HT12D
HT12F
Address/Data sequence
The following table provides address/data sequence for various models of the 2 series of decoders. A
correct device should be chosen according to the requirements of the individual addresses and data.
Part No.
HT12D
HT12F
Address/Data Bits
0
A0
A0
1
A1
A1
2
A2
A2
3
A3
A3
4
A4
A4
5
A5
A5
6
A6
A6
7
A7
A7
8
D8
A8
9
D9
A9
10
D10
A10
11
D11
A11
12
6
July 12, 1999
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
