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HT6221 Datasheet(PDF) 3 Page - Holtek Semiconductor Inc

Part # HT6221
Description  Multi-Purpose Encoders
PDF  13 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT6221 Datasheet(HTML) 3 Page - Holtek Semiconductor Inc

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Pad Coordinates
Unit: mil
Pad No.
X
Y
Pad No.
X
Y
1
-41.99
34.43
13
34.17
-46.88
2
-41.99
22.02
14
41.95
-30.26
3
-41.99
15.39
15
41.95
-13.98
4
-41.99
2.98
16
41.95
-4.12
5
-41.99
-5.61
17
41.95
12.16
6
-41.99
-28.31
18
41.95
22.02
7
-41.99
-37.83
19
39.99
46.84
8
-41.99
-46.88
20
28.26
46.84
9
-20.95
-46.88
21
-11.18
46.84
10
-14.32
-46.88
22
-23.16
46.84
11
-4.25
-46.88
23
-29.79
46.84
12
24.31
-46.88
24
-39.27
46.84
Pin Description
HT6222
Pin No. Pin Name I/O
Internal
Connection
Description
1~6
R3~R8
I
CMOS IN
Pull-low
Row control for keyboard matrix, active high
7
DOUT
O
CMOS OUT
Serial data output pin, with a 38kHz carrier
8
VDD
¾¾
Positive power supply, 1.8V~3.5V for normal
operation
9
D7
I
CMOS IN
Most significant data bit (D7) code setting
10
X2
O
OSCILLATOR
455kHz resonator oscillator output
11
X1
I
OSCILLATOR
455kHz resonator oscillator input
12
VSS
¾¾
Negative power supply
13
LED
O
CMOS OUT
Transmission enable indicator output
14~21
C8~C1
I/O
CMOS IN/OUT
Pull-low
Column control for keyboard matrix
22
AIN
I
CMOS IN
Pull-high
Pull-low
Low byte address codes (8 bits) scan input
23~24
R1~R2
I
CMOS IN
Pull-low
Row control for keyboard matrix, active high
HT6221/HT6222
3
March 2, 2000



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