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HT1612 Datasheet(PDF) 3 Page - Holtek Semiconductor Inc

Part # HT1612
Description  Timer with Dialer Interface
PDF  14 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT1612 Datasheet(HTML) 3 Page - Holtek Semiconductor Inc

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Pad Coordinates
Unit: mil
Pad No.
X
Y
Pad No.
X
Y
Pad No.
X
Y
1
–61.92
41.65
18
–18.66
–60.80
35
61.63
39.46
2
–61.92
33.98
19
4.72
–60.80
36
61.63
47.60
3
–61.92
26.30
20
12.36
–60.80
37
61.63
55.79
4
–61.92
17.85
21
20
–60.80
38
41.78
61.14
5
–61.92
10.95
22
34.98
–60.46
39
33.62
61.14
6
–61.92
3.17
23
50.02
–60.46
40
25.46
61.14
7
–61.92
–4.53
24
61.67
–60.80
41
17.30
61.14
8
–61.92
–12.22
25
61.63
–42.18
42
9.14
61.14
9
–61.92
–19.96
26
61.63
–33.98
43
0.98
61.14
10
–61.92
–27.60
27
61.63
–25.82
44
–7.18
61.14
11
–61.92
–35.26
28
61.63
–17.66
45
–15.34
61.14
12
–61.92
–42.95
29
61.63
–9.50
46
–23.50
61.14
13
–61.92
–52.26
38
61.63
–1.34
47
–31.66
61.14
14
–57.80
–60.80
39
61.63
6.80
48
–39.82
61.14
15
–45.90
–60.80
31
61.63
14.98
49
–47.98
61.14
16
–36.50
–60.80
32
61.63
23.14
50
–56.14
61.14
17
–28.86
–60.80
33
61.63
31.30
Pad Description
Pad Name
I/O
Internal
Connection
Description
SEG1~SEG30
O
CMOS OUT
LCD segement signal output pads
COM1~COM3
O
CMOS OUT
LCD common signal output pads
HK
I
CMOS IN
Pull-High
Hook switch detector input
Active low
X2
O
OSCILLATOR 32768Hz crystal oscillator output
X1
I
OSCILLATOR 32768Hz crystal oscillator input
T2
I
CMOS IN
Pull-High
Test pad (connected to VSS for production test)
T1
I
CMOS IN
Pull-High
Test pad (connected to VSS for production test)
INT
O
NMOS OUT
Interrupt output, 8 or 16Hz by mask option
TIMER
I
CMOS IN
Pull-Low
Timer reset and start/hold toggle control input pad
HT1612
3
5th July ’95



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