W91410 SERIES
TONE/PULSE DIALER WITH
SAVE FUNCTION
GENERAL DESCRIPTION
The W91410 series are monolithic ICs that provide the necessary signals for either pulse or tone
dialing. The W91410 series feature a redial and save memory.
FEATURES
•
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•
•
•
•
•
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DTMF/Pulse switchable dialer
Two by 32 digits for redial and save memory
Pulse-to-tone (P→T) keypad for long distance call operation
Break/Make ratio is selectable by pin option
Uses 4
×
4 keyboard
Easy operation with redial, flash, pause, and P→T keypads
Flash, pause, P→T (Pulse-to-tone) can be stored as a digit in memory
Minimum tone output duration: 100 mS
Minimum intertone pause: 100 mS
On-chip power-on reset
Uses 3.579545 MHz crystal or ceramic resonator
Packaged in 18-pin plastic DIP
The different dialers in the W91410 series are shown in the following table:
TYPE NO.
W91412/A
W91414/A
W91416
PULSE (ppS)
10/20
10/20
10/20
FLASH (mS)
600/300
73/100
600
FLASH PAUSE (mS)
600/300
140/100
600
PAUSE (S)
2.0
3.6
3.6
-1-
Publication Release Date: January 1995
Revision A3
W91410 SERIES
PIN CONFIGURATION
C1
C2
C3
C4
B/M
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
DP
HKS
PIN DESCRIPTION
SYMBOL
Column-
Row Inputs
PIN
1−4
&
15−18
7, 8
9
I/O
I
FUNCTION
The keyboard input may be from either the standard 4
×
4 keyboard
or an inexpensive single contact (form A) keyboard. Electronic
input from a
µC
can also be used. A valid key entry is defined as a
single row being connected to a single column.
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 pulse and tone
mode dialing sequence and flash break. Otherwise, it is switched
off.
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).
Leaving mode pin floating places the dialer in pulse mode (20 ppS).
Hook switch input.
HKS = 1: On-hook state. Chip in sleeping mode, no operation.
HKS = 0: Off-hook state. Chip enabled for normal operation.
The HKS pin is pulled to V
DD
by an internal resistor.
XT, XT
T/P MUTE
I, O
O
MODE
13
I
HKS
10
I
-2-
W91410 SERIES
Pin Description, continued
SYMBOL
DP
DTMF
PIN
11
12
I/O
O
O
FUNCTION
N-channel open drain dialing pulse output (Figure 1). Flash key will
cause DP to go active in both pulse and tone mode.
In pulse mode, remains in low state at all times. In tone mode,
outputs a dual or single tone. Detailed timing diagram for tone
mode is shown in Figure 2(a, b).
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
V
DD
, V
SS
B/M
14, 6
5
I
I
Power input pins.
The break make ratio is 60:40 if B/M = 1 and is 66.6:33.3 if B/M =
0. This pin has no function in DTMF mode.
-3-
Publication Release Date: January 1995
Revision A3
W91410 SERIES
BLOCK DIAGRAM
XT XT
HKS
B/M
MODE
SYSTEM CLOCK
GENERATION
READ/WRITE
COUNTER
ROW
(R1 to R4)
KEYBOARD
INTERFACE
RAM
CONTROL
LOGIC
PULSE
CONTROL
LOGIC
T/P MUTE
DP
COLUMN
(C1 to C4)
LOCATION
LATCH
DTMF
D/A
CONVERTER
ROW & COLUMN
PROGRAMMABLE
COUNTER
DATA LATCH
& DECODER
FUNCTIONAL DESCRIPTION
Keyboard Operation
C1
1
4
7
*
•
•
•
•
C2
2
5
8
0
C3
3
6
9
#
C4
SAVE
F
P→T
R/P
R1
R2
R3
R4
F: Flash key
R/P: Redial and pause function key
P→T: Pulse mode to tone mode
SAVE: Save memory key
-4-
W91410 SERIES
Normal Dialing
OFF HOOK
,
D1
,
D2
,
…,
Dn
1. D1, D2, ..., Dn will be dialed out.
2. Dialing length is unlimited, but redial is inhibited if length oversteps 32 digits.
Redialing
OFF HOOK
The
R/P
,
D1
,
D2
,
…,
Dn
BUSY, COME
ON HOOK
,
OFF HOOK
,
R/P
key can execute the redial function only as the first key-in after off-hook; otherwise, it
will execute the pause function.
Access Pause
OFF HOOK
,
D1
,
D2
,
R/P
,
D3
,
…,
Dn
1. The pause function can be stored in memory.
2. The pause function is executed in normal dialing or memory dialing.
3. The pause function timing diagram is shown in Figure 3.
Pulse-to-tone (P→T)
OFF HOOK
,
D1
,
D2
,
…,
Dn
,
P→T
,
D1'
,
D2'
,
…,
Dn'
1. If the mode switch is set to pulse mode, then the output signal will be:
D1, D2, ..., Dn, Pause, D1', D2', ..., Dn'
(Pulse)
(Tone)
2. If the mode switch is set to tone mode, then the output signal will be:
D1, D2, ..., Dn,
(Tone)
P→T
(Pause)
D1, D2, ..., Dn,
(Tone)
3. The dialer remains in tone mode when the digits have been dialed out and can be reset to pulse
mode only by going on-hook.
4. The P→T function timing diagram is shown in Figure 4.
-5-
Publication Release Date: January 1995
Revision A3
