W91473 Datasheet PDF - Winbond


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W91473
Winbond

Part Number W91473
Description 14-MEMORY TONE/PULSE SWITCHABLE DIALER
Page 20 Pages

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W91473 SERIES
14-MEMORY TONE/PULSE SWITCHABLE DIALER
WITH HANDFREE AND LOCK FUNCTIONS
GENERAL DESCRIPTION
The W91473 series are Si-gate CMOS IC tone/pulse switchable dialers containing a 14-channel
automatic dialing memory, including a 16-digit × 3 emergency dialing memory and a 16-digit × 10
channel repertory memory that provides a 32-digit mercury memory. These dialers also provide flash,
clear, hold, lock, and one-key redial functions.
FEATURES
DTMF/Pulse switchable dialer
32-digit LNB (last number buffer) memory
32-digit mercury memory
16-digit × 3 one-touch direct repertory memory
16-digit × 10 direct repertory memory
Uses 7 × 5 keyboard
Flash time: 98 mS, 305 mS, or 600 mS (selectable by keypad option)
Minimum tone output duration: 93 mS
Minimum intertone pause: 93 mS
On-chip power-on reset
Uses 3.579545 MHz crystal or ceramic resonator
Packaged in 22, 24, or 28-pin plastic DIP
The different dialers in the W91473 series are shown in the following table:
TYPE NO.
W91473
W91473L
W91473A
W91473AL
W91473B
W91473BL
W91473C
W91473CL
W91473D
W91473DL
PULSE
(ppS)
10
10
10
10
10/20
10/20
10/20
10/20
10
10
MEMORY
14
14
14
14
14
14
14
14
14
14
MERCURY
MEMORY
Yes
-
Yes
-
Yes
Yes
Save Memory
Save Memory
Save Memory
Save Memory
HOLD
Yes
-
Yes
-
Yes
Yes
Yes
Yes
-
-
HANDFREE
-
-
Yes
Yes
Yes
Yes
Yes
Yes
-
-
LOCK
-
Yes
-
Yes
-
Yes
-
Yes
-
Yes
PACKAGE
22
22
24
24
28
28
28
28
22
22
Publication Release Date: February 1995
- 1 - Revision A3



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PIN CONFIGURATIONS
W91473 SERIES
C1 1
22 R5
C2 2
21 R4
C3 3
20 R3
C4 4
19 R2
C5 5
C6 6
C7 7
18 R1
17 HPM MUTE
16 VDD
VSS 8
15 MODE
XT 9
14 DTMF
XT
T/P MUTE
10
11
13 DP
12 HKS
W91473/D
C1 1
22 R5
C2 2
21 R4
C3 3
20 R3
C4 4
19 R2
C5 5
18 R1
C6 6
C7 7
17 LOCK
16 VDD
VSS 8
15 MODE
XT 9
14 DTMF
XT 10
13 DP
T/P MUTE 11
12 HKS
W91473L/DL
C1 1
24 R5
C2 2
23 R4
C3 3
22 R3
C4 4
21 R2
C5 5
20 R1
C6 6
19 HPM MUTE
C7 7
VSS 8
18 VDD
17 MODE
XT 9
16 DTMF
XT 10
T/P MUTE 11
HFI 12
15 DP
14 HKS
13 HFO
W91473A
C1 1
24 R5
C2 2
23 R4
C3 3
22 R3
C4 4
21 R2
C5 5
20 R1
C6 6
C7 7
VSS 8
19 LOCK
18 VDD
17 MODE
XT 9
16 DTMF
XT
T/P MUTE
HFI
10
11
12
15 DP
14 HKS
13 HFO
W91473AL
C1 1
C2 2
C3 3
C4 4
C5 5
C6 6
C7 7
NC 8
KT 9
VSS 10
XT 11
XT 12
T/P MUTE
HFI
13
14
28 R5
27 R4
26 R3
25 R2
24 R1
23 HPM MUTE
22 NC
21 DRS
20 VDD
19 MODE
18 DTMF
17 DP
16 HKS
15 HFO
W91473B/C
C1 1
C2 2
C3 3
C4 4
C5 5
C6 6
C7 7
NC 8
KT 9
VSS 10
XT 11
XT 12
T/P MUTE 13
HFI 14
28 R5
27 R4
26 R3
25 R2
24 R1
23 HPM MUTE
22 LOCK
21 DRS
20 VDD
19 MODE
18 DTMF
17 DP
16 HKS
15 HFO
W91473BL/CL
-2-



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W91473 SERIES
PIN DESCRIPTION
SYMBOL
Column-
Row
Inputs
22-PIN
17
&
1822
24-PIN
17
&
2024
XT, XT
9, 10
T/P
MUTE
11
9, 10
11
DP 13 15
MODE
15
17
HKS
12
14
28-PIN
18
&
2428
11, 12
13
17
19
16
I/O FUNCTION
I The keyboard input may be used with
either the standard 7 × 5 keyboard or an
inexpensive single contact (form A)
keyboard. Electronic input with µC can
also be used.
A valid key entry is defined by a single
row being connected to a single column.
I, O A built-in inverter provides oscillation with
an inexpensive 3.579545 MHz crystal or
ceramic resonator.
O 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.
O N-channel open drain dialing pulse output
(Figure 1).
Flash key causes DP to go active when in
pulse mode and tone mode.
I Pulling mode pin to VSS places the dialer
in tone mode.
Pulling mode pin to VDD places the dialer
in pulse mode (10 ppS, M/B = 2:3).
Leaving mode pin floating places the
dialer in pulse mode (10 ppS, M/B = 1:2).
I Hook switch input.
HKS = 1: On-hook state. Chip in sleep
mode, no operation.
HKS = 0: Off-hook state. Chip enabled for
normal operation.
HKS pin is pulled to VDD by internal
resistor.
Publication Release Date: February 1995
- 3 - Revision A3



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W91473 SERIES
Pin Description, continued
SYMBOL 22-PIN
HPM
MUTE
17
(only for
W91473/D
)
24-PIN
19
(only for
W91473A)
NC -
-
LOCK
17
(W91473L
/DL)
19
(W91473
AL)
28-PIN
23
8, 22
(W91473
B/C)
22
(W91473
BL/CL)
I/O FUNCTION
O The HPM MUTE is a conventional
inverter output.
During pulse dialing, flash, hold, and
mercury mute functions, this pin will
output an active high.
It remains in a low state at all other times.
- No connection.
I The function of the LOCK pin is shown
below:
LOCK PIN
FUNCTION
VDD "0," " 9" dialing inhibited
Floating
VSS
Normal dialing
"0" dialing inhibited
DTMF
14
16
18 O 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.
OUTPUT FREQUENCY
Specified
R1 697
R2 770
R3 852
R4 941
C1 1209
C2 1336
C3 1477
Actual
699
766
848
948
1216
1332
1472
Error %
+0.28
-0.52
-0.47
+0.74
+0.57
-0.30
-0.34
VDD, VSS
16, 8
1, 8
20, 10
I Power input pins.
-4-




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