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HT6222A Datasheet(PDF) 9 Page - Holtek Semiconductor Inc

Part # HT6222A
Description  Multi-Purpose Encoders
Download  19 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT6222A Datasheet(HTML) 9 Page - Holtek Semiconductor Inc

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Application Circuits
HT6220A Application Circuit
Note: Typical infrared diode: EL-1L2 (KODENSHI CORP.)
HT6220A/HT6221A/HT6221B/HT6222A
Rev. 1.10
9
June 1, 2010
K 2 1 I n p u t
t > 1 2 6 m s
K m I n p u t
K 2 1
3 6 m s
3 6 m s
1 0 8 m s ( m i n . )
D O U T
K m
K 2 1 c o d e t r a n s m i s s i o n
K 2 1 + K m c o d e
t r a n s m i s s i o n
Note: Km can be one of K22~K24
Timing 6. Valid Double-Key Input
H T 6 2 2 0 A
D 7
V S S
8
7
C 1
C 2
C 3
C 4
R 1
2 0 0 k W ´ 5
R 2
R 3
R 4
R 5
R 6
A I N
1 3
1 2
1 1
1 0
1 5
1 6
1
2
3
4
1 4
5
D O U T
V D D
3 3 0 W
4 7 m F / 1 6 V
I n f r a r e d
4 . 7 W
6
V D D
L E D
K 1
K 2
K 3
K 4
K 3 3
K 3 4
K 5
K 6
K 7
K 8
K 3 7
K 3 8
K 9
K 1 0
K 1 1
K 1 2
K 4 1
K 4 2
K 1 3
K 1 4
K 1 5
K 1 6
K 4 5
K 4 6
1 N 4 1 4 8 ´ 5
C 5
9
K 1 7
K 1 8
K 1 9
K 2 0
K 4 9
K 5 0
DOUT and IR LED
After the transmission codes are sent, the DOUT pin
generates transmission codes with a carrier, and the
IR-LED goes low to drive a transmission indicator. The
DOUT pin abbreviate exterior transistor, to provide large
current driving ability.
IRC
The frequency of the internal RC(IRC) oscillator is de-
pending on the temperature and operating voltage.
At Ta=25
°C at 3.0V, the IRC has an accuracy of ±1 per
cent. In the range of 0
°Cto70°C at 2.0V~3.6V, the accu-
racy value of the RC frequency increases to the maxi-
mum value of
±2 per cent.


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