HT6221/HT6222
Multi-Purpose Encoders
Features
·
·
Operating voltage: 1.8V~3.5V
Three double-active keys
·
·
DOUT with 38kHz carrier for IR medium
Maximum active keys
·
-
Low standby current
HT6221: 32 keys
-
HT6222: 64 keys
·
Minimum transmission word: one word
·
Low power and high noise immunity CMOS
·
455kHz ceramic resonator or crystal
technology
·
16-bit address codes
·
HT6221: 20-pin SOP package
·
8-bit data codes
HT6222: 24-pin SOP package
·
PPM code method
Applications
·
·
Television and video cassette recorder controllers
Car door controllers
·
·
Burglar alarm systems
Car alarm systems
·
·
Smoke and fire alarm systems
Security systems
·
·
Garage door controllers
Other remote control systems
General Description
The HT6221/HT6222 are CMOS LSI encoders designed
for use in remote control systems. They are capable of
encoding 16-bit address codes and 8-bit data codes.
Each address/data input can be set to one of the two logic
states, 0 and 1.
The HT6221/HT6222 contain 32 keys (K1~K32) and 64
keys (K1~K64), respectively. When one of the keys is
triggered, the programmed address/data is transmitted
together with the header bits via an IR (38kHz carrier)
transmission medium.
Block Diagram
X
2
X
1
D
a
t
a
S
e
l
e
c
t
D
L
O
U
T
O
s
c
i
l
l
a
t
o
r
D
i
v
i
d
e
r
&
B
u
f
f
e
r
E
D
¸
2
4
C
o
u
n
t
e
r
&
S
y
n
c
.
R
1
K
e
y
b
o
a
r
d
1
o
f
2
4
D
e
c
o
d
e
r
C
i
r
c
u
i
t
M
a
t
r
i
x
&
D
a
t
a
R
O
M
G
a
t
e
&
R
e
g
i
s
t
e
r
s
C
i
r
c
u
i
t
R
8
B
i
n
a
r
y
D
e
t
e
c
t
o
r
V
D
D
V
S
S
C
1
C
8
A
I
N
D
7
Rev. 1.50
1
October 1, 2007