W91580 SERIES
24-MEMORY TONE/PULSE SWITCHABLE DIALER
WITH HANDFREE AND HOLD FUNCTIONS
GENERAL DESCRIPTION
The W91580 series dialers are Si-gate CMOS IC tone/pulse switchable dialers containing a 24-
channel automatic dialing memory, including a 16-digit
×
3 emergency dialing memory, a 16-digit
×
20 channel repertory memory that provides one-touch and three-touch dialing, and a 32-digit mercury
memory. These dialers also provide flash, clear, hold, and one-key redial functions.
FEATURES
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
DTMF/Pulse switchable dialer
31/32-digit LNB (last number buffer) memory (tone/pulse mode)
31/32-digit mercury memory (tone/pulse mode)
15/16-digit
×
3 one-touch direct repertory memory (tone/pulse mode)
15/16-digit
×
20 direct or indirect repertory memory (tone/pulse mode)
Uses 9
×
5 keyboard
Flash time: 98 mS, 305 mS, or 600 mS (selectable by keypad option)
Pause time: 3.6 sec.
Pause and 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 22, 24, or 28-pin plastic DIP
The different dialers in the W91580 series are shown in the following table:
TYPE NO.
W91580
W91580A
W91580B
W91580C
PULSE
(ppS)
10
10
10/20
10/20
MEMORY
20
20
24
24
MERCURY
MEMORY
-
-
Yes
Save
HOLD
-
-
Yes
Yes
HANDFREE
-
Yes
Yes
Yes
PACKAGE
22
24
28
28
-1-
Publication Release Date: Auguest 1995
Revision A3
W91580 SERIES
PIN CONFIGURATIONS
C1
C2
C1
C1
C2
C3
C4
C5
C6
C7
VSS
XT
XT
T/P MUTE
1
2
3
4
5
6
7
8
9
10
11
22
21
20
19
18
17
16
15
14
13
12
R5
R4
R3
R2
R1
NC
VDD
MODE
DTMF
DP/C9
HKS
C2
C3
C4
C5
C6
C7
VSS
XT
XT
T/P MUTE
HFI
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
R5
R4
R3
R2
R1
NC
VDD
MODE
DTMF
DP/C9
HKS
HFO
C3
C4
C5
C6
C7
C8
KT
VSS
XT
XT
T/P MUTE
HFI
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
R5
R4
R3
R2
R1
HPM MUTE
NC
DRS
VDD
MODE
DTMF
DP/C9
HKS
HFO
W91580
W91580A
W91580B/C
PIN DESCRIPTION
SYMBOL
Column-
Row
Inputs
22-PIN
1−7
&
18−22
24-PIN
1−7
&
20−24
28-PIN
1−8
&
24−28
I/O
I
FUNCTION
The keyboard input may be used with either the
standard 9
×
5 keyboard or an inexpensive
single contact (form A) keyboard. Electronic
input from a
µC
can also be used.
A valid key entry is defined by 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.
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.
XT, XT
9, 10
9, 10
11, 12
I, O
T/P MUTE
11
11
13
O
HPM
MUTE
-
-
23
O
-2-
W91580 SERIES
Pin Description, continued
SYMBOL
MODE
22-PIN
15
24-PIN
17
28-PIN
19
I/O
I
FUNCTION
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, M/B = 2:3).
Leaving mode pin floating places the dialer in
pulse mode (10 ppS, M/B = 1:2).
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 V
DD
by internal resistor.
N-channel open drain dialing pulse output
(see Figure 1).
Flash key causes DP to go active when in pulse
mode and tone mode.
No connection.
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
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
HKS
12
14
16
I
DP /C9
13
15
17
O
NC
DTMF
17
14
19
16
22
18
-
O
V
DD,
V
SS
16, 8
18, 8
20, 10
I
Power input pins.
-3-
Publication Release Date: Auguest 1995
Revision A3
W91580 SERIES
Pin Description, continued
SYMBOL
HFI, HFO
22-PIN
-
24-PIN
12, 13
28-PIN
14, 15
I/O
I, O
FUNCTION
Handfree control pins. A low pulse on the HFI
input pin toggles the handfree control state. The
status of the handfree control state is described by
the following table:
CURRENT STATE
Hook SW.
HFO
Low
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
-
On Hook
Off Hook
On Hook
Off Hook
Off Hook
-
Low
High
HFI pin is pulled to V
DD
by internal resistor.
KT
-
-
9
O
Keytone signal output. A keytone will be generated
whenever a valid key is pressed. Frequency is 600
Hz and duration is 35 mS.
Dial rate selection.
This pin is pulled to V
DD
by an internal resistor.
DRS
MODE
PIN
V
DD
1
Floating
V
SS
V
DD
0
Floating
V
SS
TONE/PULSE
Pulse
Pulse
Tone
Pulse
Pulse
Tone
10 ppS
20 ppS
1:2
1:2
DIAL
RATE
10 ppS
10 ppS
M/B
2:3
1:2
DRS
-
-
21
I
-4-
W91580 SERIES
BLOCK DIAGRAM
XT
HKS
MODE
XT
SYSTEM CLOCK
GENERATOR
DRS
HFI
KT
KEYBOARD
INTERFACE
RAM
READ/WRITE
COUNTER
CONTROL
LOGIC
PULSE
CONTROL
LOGIC
T/P MUTE
HPM MUTE
HFO
DP/C9
ROW
(R1 to R5)
COLUMN
(C1 to C8)
LOCATION
LATCH
DTMF
D/A CONVERTER
ROW & COLUMN
PROGRAMMABLE
COUNTER
DATA LATCH
& DECODER
FUNCTIONAL DESCRIPTION
Keyboard Operation
C1
1
4
7
*/T
F1
*
MER
C2
2
5
8
0
F2
C3
3
6
9
#
F3
C4
S
MEMO
CLR
R/P
R
C5
M00
M01
M02
M03
M04
C6
M05
M06
M07
M08
M09
Save
C7
M10
M11
M12
M13
M14
function.
DP /C9
M15
M16
M17
M18
M19
C8
EM1
EM2
EM3
H
*MER
R1
R2
R3
R4
R5
is for W91580B only; Fin W91580C this key performs
-5-
Publication Release Date: Auguest 1995
Revision A3
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