HT6220A/HT6221A/HT6221B/HT6222A
Multi-Purpose Encoders
Features
·
Operating voltage: 2.0V~3.6V
·
DOUT with 38kHz carrier for IR medium
·
Low standby current
·
Minimum transmission word: one word
·
Build-in RC (Internal RC) oscillator
·
16-bit address codes
·
8-bit data codes
·
PPM code method
·
Three double-active keys
·
Maximum active keys
HT6220A: 30 keys
HT6221A: 32 keys
HT6221B: 48 keys
HT6222A: 64 keys
·
Low power and high noise immunity CMOS
technology
·
HT6220A: 16-pin NSOP package
-
-
-
-
HT6221A/HT6221B: 20-pin SOP package
HT6222A: 24-pin SOP package
Applications
·
Television , setup box and DVD player controllers
·
Burglar alarm systems
·
Smoke and fire alarm systems
·
Garage door controllers
·
Car door controllers
·
Car alarm systems
·
Security systems
·
Other remote control systems
General Description
The devices are CMOS LSI encoders designed for use
in remote control systems. They are capable of encod-
ing 16-bit address codes and 8-bit data codes. Each ad-
dress/data input can be set to one of the two logic
states, 0 and 1.
The HT6220A/HT6221A/HT6221B/HT6222A contain
30keys (K1~K20, K33~K34, K37~K38, K41~K42,
K45~K46, K49~K50), 32 keys (K1~K32), 48 keys
(K1~K32, K33~K34, K37~K38, K41~K42, K45~K46,
K49~K50, K53~K54, K57~K58, K61~K62) and 64 keys
(K1~K64), respectively. When one of the keys is trig-
gered, the programmed address/data is transmitted to-
gether with the header bits via an IR (38kHz carrier)
transmission medium.
Block Diagram
O s c illa to r
D iv id e r
D a ta S e le c t
& B u ffe r
S y n c .
C ir c u it
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
¸
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. 1.10
1
June 1, 2010
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
