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W9145AL View Datasheet(PDF) - Winbond

Part NameDescriptionManufacturer
W9145AL 15-MEMORY TONE/PULSE DIALER WITH LOCK AND HANDFREE FUNCTIONS Winbond
Winbond Winbond
W9145AL Datasheet PDF : 18 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
W9145 SERIES
SYMBOL
Column-
Row
Inputs
22-PIN
14
&
1822
XT, XT
6, 7
T/P
8
MUTE
MODE
14
HKS
9
B/M
16
VDD, VSS
X MUTE
17, 5
13
24-PIN
14
&
2024
6, 7
8
16
9
16
19, 5
15
I/O
FUNCTION
I Keyboard inputs may be connected to either a standard
keyboard, an inexpensive signal contact (Form A)
keyboard, or electronic input from a µC. A valid key entry
is defined by a single row being connected to a single
column.
I, O A built-in inverter provides oscillation by means of an
inexpensive 3.579545 MHz crystal or ceramic resonator.
O The T/P MUTE is a conventional CMOS inverter that
pulls to VDD in the absence of keypad input and pulls to
VSS when an address keypad entry is sensed (excluding
the * and # keypads in pulse mode). When any keypad in
row 5 and column 5 is pushed, the mute out remains at
high level.
I Pull to VSS to enable tone mode. Pull to VDD to enable
pulse mode (10 ppS).
I Hook switch input. When pulled to high, chip is in on-hook
state (no operation). When pulled to low, chip is in off-
hook state (enabled for normal operation). This pin is
pulled to VDD by internal resistor.
Note: This pin operates in conjunction with the handfree
control pins; for further information see description of
handfree control pins below.
I B/M = 1: Break/Make ratio is 60:40.
B/M = 0: Break/Make ratio is 67:33.
This pin has no function in tone mode.
I Power input pins.
O The X MUTE is a conventional CMOS inverter that in tone
mode is active while a DTMF signal is being transmitted.
In pulse mode, this output remains low at all times.
Publication Release Date: August 1996
-3-
Revision A4
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