W91320N SERIES
TONE/PULSE DIALER WITH HANDFREE
LOCK AND HOLD FUNCTIONS
GENERAL DESCRIPTION
The W91320N series are Si-gate CMOS ICs that provide the necessary signals for tone or pulse
dialing. The W91320N series provide one-key redial, handfree dialing, hold, redial, and lock
functions.
FEATURES
•
•
DTMF/pulse switchable dialer
32-digit redial memory
(*/T) keypad for long distance call operation
5
×
5 keyboard
•
Pulse-to-tone
•
Uses
•
•
•
•
•
•
•
Easy operation with redial, flash, pause, and */T keypads
Pause, pulse-to-tone (*/T) can be stored as a digit in memory
0 or 9 dialing inhibition pin for PABX system or long distance dialing lock out
Off-hook delay 300 mS in lock mode ( DP will keep low for 300 mS while off hook)
First key-in delay 300 mS output in lock mode
Dialing rate (10, 20 ppS ) selected by bonding option
Minimum tone output duration: 93 msec.
intertone pause: 93 msec.
Flash break time (73, 100, 300, 600 msec.) selectable by keypad, and the pause time is 1.0 sec.
power-on reset
Uses 3.579545 MHz crystal or ceramic resonator
•
Minimum
•
•
On-chip
•
•
Packaged in 18, 20, or 22-pin plastic DIP
•
The different dialers in the W91320N series are shown in the following table:
TYPE NO.
W91320N
W91321N
W91320AN
W91321AN
W91320LN
W91320ALN
REPLACEMENT
TYPE NO.
W91320
W91321
W91320A
W91321A
W91322L
W91322AL
PULSE
(ppS)
10
20
10
20
10
10
FLASH
(mS)
600/100/300/73
600/100/300/73
600/100/300/73
600/100/300/73
600/100/300/73
600/100/300/73
M/B
Pin
Pin
Pin
Pin
Pin
Pin
HANDFREE
DIALING
-
-
Yes
Yes
-
Yes
LOCK
-
-
-
-
Yes
Yes
PACKAGE
(PINS)
18
18
20
20
20
22
-1-
Publication Release Date: May 1997
Revision A2
W91320N SERIES
PIN CONFIGURATIONS
C1
C1
C2
C3
C4
H/P MUTE
V
SS
XT
XT
T/P MUTE
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
R4
R3
R2
R1
V
DD
MODE
DTMF
XT
DP/C5
HKS
T/P MUTE
HFI
C2
C3
C4
H/P MUTE
V
SS
XT
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
R4
R3
R2
R1
V
DD
MODE
DTMF
DP/C5
HKS
HFO
W91320N/W91321N
W91320AN/W91321AN
C1
C1
C2
C3
C4
LOCK
H/P MUTE
V
SS
XT
XT
T/P MUTE
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
R4
R3
R2
R1
V
DD
NC
MODE
DTMF
DP/C5
HKS
C2
C3
C4
LOCK
H/P MUTE
V
SS
XT
XT
T/P MUTE
HFI
1
2
3
4
5
6
7
8
9
10
11
22
21
20
19
18
17
16
15
14
13
12
R4
R3
R2
R1
V
DD
NC
MODE
DTMF
DP/C5
HKS
HFO
W91320LN
W91320ALN
-2-
W91320N SERIES
PIN DESCRIPTION
SYMBOL
Column-
Row
Inputs
18-PIN
1−4
&
15−18
20-PIN
1−4
&
17−20
22-PIN
1−4
&
19−22
I
I/O
FUNCTION
The keyboard inputs may be used with
either the standard 5
×
5 keyboard or
the inexpensive single contact (Form A)
keyboard. Electronic input from a
µC
can also be used.
A valid key-in is defined as a single row
being connected to a single column
XT, XT
7, 8
7, 8
(8, 9,
W91320LN
only)
8, 9
I, O
A built-in inverter provides oscillation
with an inexpensive 3.579545 MHz
crystal or ceramic resonator.
The T/P MUTE is a conventional
CMOS N-channel open drain output.
The output transistor is switched on
during dialing sequence, one-key redial
break and flash break time. Otherwise,
it is switched off.
T/P
MUTE
9
9
(10,
W91320LN
only)
10
O
MODE
13
15
(14,
W91320LN
only)
16
I
Pulling mode pin to V
SS
places the
dialer in tone mode.
Pulling mode pin to V
DD
places the
dialer in pulse mode. (10 ppS; 20 ppS
for W91321N/321AN M/B = 40:60)
Floating mode pin places the dialer in
pulse mode. (10 ppS; 20 ppS for
W91321N/321AN M/B = 33.3:66.7)
HKS
10
12
(11,
W91320LN
only)
13
I
Hook switch input.
HKS = V
DD
: On-hook state. Chip in
sleeping mode, no operation.
HKS = V
SS
: Off-hook state. Chip is
enable for normal operation.
HKS pin is pulled to V
DD
by internal
resistor.
-3-
Publication Release Date: May 1997
Revision A2
W91320N SERIES
Pin Description, continued
SYMBOL
DP / C5
18-PIN
11
20-PIN
13
(12,
W91320LN
only)
22-PIN
14
I/O
O
FUNCTION
N-channel open drain dialing pulse
output.
Flash key will cause DP to be active in
either tone mode or pulse mode.
The timing diagram for pulse mode is
shown in Figure 1(a, b, c, d).
V
DD
, V
SS
14, 6
16, 6
(16, 7
W91320LN
only)
18, 7
I
Power input pins.
H/P
MUTE
5
5
(6,
W91320LN
only)
6
O
The H/P MUTE is a conventional
inverter output. During pulse dialing,
flash break, one-key redial break, and
hold period, this output is active high;
otherwise, it remains in low state.
No connection.
NC
-
15
(W91320LN
only)
17
-
DTMF
12
14
(13,
W91320LN
only)
15
O
In pulse mode, this pin remains in low
state at all time.
In the tone mode, it will output a dual or
single tone.
Detailed timing diagram for tone mode
is shown in Figure 2(a, b, c, d).
Output Frequency
Specified
R1
R2
R3
R4
C1
C2
C3
697
770
852
941
1209
1336
1477
Actual
699
766
848
948
1216
1332
1472
Error %
+0.28
-0.52
-0.47
+0.74
+0.57
-0.30
-0.34
-4-
W91320N SERIES
Pin Description, continued
SYMBOL
HFI,
HFO
18-PIN
-
20-PIN
10, 11
(W91320AN/
321AN)
22-PIN
11, 12
I/O
I, O
FUNCTION
Handfree control pins. The handfree
control state is toggled on by a low
pulse on the HFI input pin. The status
of the handfree control state is
described in the following table:
CURRENT STATE
Hook SW.
HFO
Low
On Hook
Off Hook
On Hook
Off Hook
Off Hook
Low
High
High
High
Input
HFI
HFI
HFI
Off Hook
On Hook
On Hook
NEXT STATE
HFO
High
Low
Low
Low
Low
High
Dialing
Yes
No
Yes
Yes
No
Yes
HFI pin is pulled to V
DD
by internal
resistor.
Detailed timing diagrams are shown in
Figure 3(a, b, c).
LOCK
-
5
(6,
W91320LN
only)
5
I
The function of this terminal is to
prevent "0" dialing and "9" dialing under
PABX system long distance call control.
When the first key input after reset is 0
or 9, all key inputs, including the 0 or 9
key, become invalid and the chip
generates no output. The telephone is
reinitialized by a reset.
LOCK PIN
Floating
V
DD
V
SS
FUNCTION
Normal dialing mode
"0," "9" dialing inhibited
"0" dialing inhibited
-5-
Publication Release Date: May 1997
Revision A2
