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W91578DN Datasheet Preview

W91578DN Datasheet

23-MEMORY TONE/PULSE DIALER

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W91570DN SERIES
23-MEMORY TONE/PULSE DIALER WITH
AUTOREDIAL RTC AND LCD DISPLAY FUNCTIONS
GENERAL DESCRIPTION
The W91570DN series ICs are Si-gate CMOS ICs that provide the signals needed for either pulse or
tone dialing. They feature 23 number memories and a 16-digit LCD driver for displaying telephone
numbers and calling time. A real time clock is included to display the time of day. The W91570DN
series is fabricated using CMOS technology providing good performance in low voltage, low power
applications.
FEATURES
Three by 32 digits for redial, save and mercury memory
Twenty by 16 digits for one-touch direct or two-touch indirect repertory memory
Uses 6 × 10 keyboard
Pause, Pulse-to-tone (*/T) and flash can be stored as a digit in memory
Minimum tone output duration: 87 mS
Minimum intertone pause: 87 mS
Tone/Pulse mode pin selectable
Make/Break ratio pin selectable
Dialing rate (10 or 20 ppS) pin selectable
Pause time (2.0 or 3.6 Sec) selectable by keypad
Flash break time (100, 300, or 600 mS) selectable by keypad
Built-in 12 or 16-digit LCD driver (1/4 duty, 1/3 bias) selectable by mask option
Built-in calling timer from [00:00] to [59:59]
Uses 3.579545 MHz TV quartz crystal or ceramic resonator
Uses 32768 Hz crystal as RTC frequency base
Packaged in 80-pin plastic QFP with RTC
Provides one-key-redial and auto-redial functions
Switchable 24-hour clock or 12-hour clock with p.m. mode
0 or 9 dialing inhibition pin for PABX systems or long distance dialing lock out
On-hook debounce: 150 msec in normal mode and 20 msec in lock mode
Off-hook delay 300 mS in lock mode (i.e. DP will keep low for 300 mS while off hook)
First key-in delay: 300 msec in lock mode
MUTE key for speech mute
Cascade and mixed dialing allowed
The functions of the different dialers in the W91570DN series are shown in the following table:
PRODUCT NO. LCD DIGITS
LOCK
RTC BATTERY
W91572DNF
16
1.5V
W91574DNF
W91576DNF
W91578DNF
16
12
12
3V
1.5V
3V
Publication Release Date: May 1997
- 1 - Revision A2




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W91578DN Datasheet Preview

W91578DN Datasheet

23-MEMORY TONE/PULSE DIALER

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PIN CONFIGURATION
65
W91570DN SERIES
41
80
1
25
PIN NAME
SEG29
SEG30
SEG31
SEG32
TEST
KMUTE
KT
TEST1
VDD
NC/ LOCK
B/M
DTMF
SET RTC
VSS
H/P MUTE
T/P MUTE
HFO
DP / C10
MODE
COL1
QFP-80
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
PIN NAME
COL2
COL3
COL4
COL5
COL6
COL7
COL8
COL9
ROW1
ROW2
ROW3
ROW4
ROW5
XT1
XT1
HKS
HFI
VRTC1
TEST 2
ARD
QFP-80
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
PIN NAME
TESTL
APSET
XT2
XT2
VLCD
VRTC2
QFP-80
41
42
43
44
45
46
CN 47
CP 48
COM1
COM2
49
50
COM3
COM4
SEG1
51
52
53
SEG2
SEG3
54
55
SEG4
56
SEG5
57
SEG6
58
SEG7
59
SEG8
60
PIN NAME QFP-80
SEG9
61
SEG10
SEG11
SEG12
62
63
64
SEG13
SEG14
65
66
SEG15
SEG16
67
68
SEG17
SEG18
SEG19
SEG20
SEG21
69
70
71
72
73
SEG22
SEG23
74
75
SEG24
76
SEG25
77
SEG26
78
SEG27
79
SEG28
80
-2-


Part Number W91578DN
Description 23-MEMORY TONE/PULSE DIALER
Maker Winbond
Total Page 30 Pages
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