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HT6222(24SOP) Datasheet

  • HT6222(24SOP)

  • Consumer IC

  • 11頁(yè)

  • ETC

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HT6221/HT6222
Multi-Purpose Encoders
Features
路
Operating voltage: 1.8V~3.5V
路
DOUT with 38kHz carrier for IR medium
路
Low standby current
路
Minimum transmission word: one word
路
455kHz ceramic resonator or crystal
路
16-bit address codes
路
8-bit data codes
路
PPM code method
路
Three double-active keys
路
Maximum active keys
-
HT6221: 32 keys
-
HT6222: 64 keys
路
Low power and high noise immunity CMOS technol-
ogy
路
HT6221: 20-pin SOP package
HT6222: 24-pin SOP package
Applications
路
Television and video cassette recorder controllers
路
Burglar alarm systems
路
Smoke and fire alarm systems
路
Garage door controllers
路
Car door controllers
路
Car alarm systems
路
Security systems
路
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 ta S e le c t
& B u ffe r
S y n c .
C ir c u it
O s c illa to r
D iv id e r
D O U T
L E D
R 1
R 8
K e y b o a rd
M a tr ix &
G a te
C ir c u it
D a ta R O M
& R e g is te r s
賂
2 4 C o u n te r &
1 o f 2 4 D e c o d e r
B in a r y D e te c to r
C 1
C 8
A IN
D 7
V D D
V S S
Rev. 1.30
1
September 5, 2001

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