Winbond Electronics W91344AN, W91342N, W91342AN, W91340N, W91340AN Datasheet
W91340N SERIES
10-MEMORY TONE/PULSE DIALER WITH
HANDFREE AND HOLD FUNCTIONS
GENERAL DESCRIPTION
The W91340N series are tone/pluse switchable telephone dialers with ten memories, hold function,
and a handfree dialing control circuit. Fabricated using CMOS technology, the W91340N series offer good
performance in low-voltage and low-power applications.
FEATURES
• DTMF/pulse switchable dialer
• 32-digit redial memory
• Ten by 16-digit two-touch direct repertory memory
• Cascaded dialing allowed, with unlimited dialing length
• Pulse-to-tone (*/T) keypad for long distance call operation
• Uses 5 × 4 keyboard
• Easy operation with redial, flash, pause, and */T keypads
• Pause, P→T (pulse-to-tone) can be stored as a digit in memory
• Dialing rate (10 ppS or 20 ppS) is selectable by bonding option
• On-hook debounce time: 150 msec.
• Minimum tone output duration: 93 msec. (W91344AN: 87 mS)
• Minimum intertone pause: 93 msec. (W91344AN: 87 mS)
• Flash break time (73, 100, 300, 600 msec) selectable by keypad; pause time is 1.0 sec.
• Make/break ratio (40:60 or 33.3:66.7) selectable by MODE pin
• On-chip power-on reset
• Uses 3.579545 MHz crystal or ceramic resonator
• Packaged in 18 or 20-pin plastic DIP
The different dialers in the W91340N series are shown in the following table:
•
TYPE NO. REPLACEMENT
TYPE NO.
W91340N W91340 10 600/300/73/100 Pin - 18
W91341
W91342N W91342 20 600/300/73/100 Pin - 18
W91340AN W91340A 10 600/300/73/100 Pin Yes 20
W91341A
W91342AN W91342A 20 600/300/73/100 Pin Yes 20
W91344AN New type 10 600/300/73/100 Pin Yes 20
PULSE
(ppS)
FLASH
(mS)
M/B HANDFREE
DIALING
PACKAGE
(PINS)
Note: The W91344AN is designed specifically for use in France. The pause time is not added in pulse-to-tone mode.
Publication Release Date: May 1997
- 1 - Revision A2
PIN CONFIGURATIONS
XT
XT
234
789
10
HFI
HKS
DTMF
MODE
R4
R3
R2
R1
13
18
19
16
15
14
12
11
HFO
XT
XT
234
789
HKS
DTMF
MODE
R4R3R2
R1
12
18
16
15
14
101113
XT
MUTE
MUTE
HKS
HKS
HKS
HKS
C1
C2
C3
C4
H/P MUTE
V
SS
W91340N SERIES
1
H/P MUTE
V
C1
C2
C3
C4
SS
5
6
1
17
5
6
V
DD
20
17
V
DD
DP
T/P MUTE
DP
W91340N/342N W91340AN/342AN/344AN
T/P MUTE
PIN DESCRIPTION
SYMBOL 18-PIN 20-PIN I/O FUNCTION
Column-
Row Inputs
XT,
T/P
1−4
&
15−18
1−4
&
17−20
7, 8 7, 8 I, O A built-in inverter provides oscillation with an inexpensive
9 9 O
MODE 13 15 I Pulling mode pin to VSS places the dialer in tone mode.
10 12 I Hook switch input.
The keyboard inputs may be used with either a standard
5 × 4 keyboard or an inexpensive single contact (Form A)
I
keyboard. Electronic input from a µC can also be used.
A valid key is defined as a single row being connected to a
single column.
3.579545 MHz crystal or ceramic resonator.
The T/P
is a conventional CMOS N-channel open
drain output.
The output transistor is switched on during dialing sequence
and flash break time. Otherwise, it is switched off.
Pulling mode pin to VDD places the dialer in pulse mode
with M/B ratio of 40:60 (10 ppS, except for
W91342N/W91342AN = 20 ppS.)
Floating mode pin places the dialer in pulse mode with M/B
ratio of 33.3:66.7 (10 ppS, except for W91342N/W91342AN
= 20 ppS.)
= VDD: On-hook state. Chip in sleeping mode, no
operation.
= VSS: Off-hook state. Chip is enabled for normal
operation.
pin is pulled to VDD by an internal resistor.
- 2 -
W91340N SERIES
DP
R1
R3
R4
C1
C2
C3
HFI
HFI
CURRENT STATE
HFO
HFI
Pin Description, continued
SYMBOL 18-PIN 20-PIN I/O FUNCTION
11 13 O 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).
VDD, VSS 14, 6 16, 6 I Power input pins.
DTMF 12 14 O In pulse mode, this pin remains in low state at all times. 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).
Output Frequency
Specified Actual Error %
+0.28
-0.52
-0.47
+0.74
+0.57
-0.30
-0.34
R2
697
770
852
941
1209
1336
1477
699
766
848
948
1216
1332
1472
, HFO
H/P MUTE
- 10, 11 I, O Handfree control pins. The handfree control state is toggled
on by a low pulse on the
input pin. The status of the
handfree control state is described in the following table:
NEXT STATE
Hook SW.
On Hook
Off Hook
On Hook
Off Hook
Off Hook High On Hook High
HFO
Low
High
High
Low
Input
HFI
HFI
HFI
Off Hook
On Hook
Dialing
High
Low No
Low
Low
Low No
Yes
Yes
Yes
Yes
pin is pulled to VDD by an internal resistor.
Detailed timing diagram is shown in Figure 3.
5 5 O The H/P MUTE is a conventional inverter output. During
pulse dialing, flash break or hold period, this output is active
high; otherwise, it remains in low state.
Publication Release Date: May 1997
- 3 - Revision A2
BLOCK DIAGRAM
W91340N SERIES
XT XT
ROW
(R1 to R4, Vx)
COLUMN
(C1 to C4)
DTMF
KEYBOARD
INTERFACE
D/A
CONVERTER
FUNCTIONAL DESCRIPTION
Keyboard Operation
C1 C2 C3 C4
1 2 3 S R1
4 5 6 F4 R2
7 8 9 A R3
∗/T
F1 F2 F3 H VX
READ / WRITE
COUNTER
LOCATION
LATCH
ROW & COLUMN
PROGRAMMABLE
COUNTER
RAM
0 # R/P R4
DATA LATCH
& DECODER
SYSTEM CLOCK
GENERATOR
CONTROL
LOGIC
PULSE
CONTROL
LOGIC
HKS
HFI
MODE
H/P MUTE
T/P MUTE
DP
HFO
• S: Store function key
• H: Hold function key
• A: Indirect repertory memory dialing function key
• R/P: Redial and pause function key
• ∗/T: ∗ in tone mode and P→T in pulse mode
• F1, …, F4: Flash keys, F1 = 600 mS, F2 = 300 mS, F3 = 73 mS, F4 = 100 mS
Notes:
D1, ..., Dn, D1', ..., Dn': 0, ..., 9, */T, #
Ln: 0, ..., 9 ; Fn: F1, ..., F4
- 4 -
Normal Dialing
HFI
¡õ
HFI
¡õ
HFI
¡õ
HFI
¡õ
HFI
¡õ
D2
HFI
¡õ
HFI
¡õ
W91340N SERIES
OFF HOOK , (or ON HOOK
1. D1, D2, ..., Dn will be dialed out.
2. Dialing length is unlimited, but redial is inhibited if length exceeds 32 digits in normal dialing.
&
),
D1 , D2 ,
Dn
...,
Redialing
OFF HOOK , (or ON HOOK
ON HOOK , OFF HOOK , (or ON HOOK
1. The redial memory content will be dialed out.
2. The R/P key can execute the redial function only as the first key-in after off-hook; otherwise, it
executes pause function.
&
),
D1 , D2 , ..., Dn Busy, Come
&
),
R/P
Number Store
OFF
HOOK
1. If the sequence of the dialed digits D1, D2, ..., Dn has not
finished,
, (or ON HOOK
&
),
D1 , D2 , ..., Dn , S , S , Ln
S will be ignored.
2. D1, D2, ..., Dn will be dialed out and stored in memory location.
OFF HOOK , (or ON HOOK
3. D1, D2, ..., Dn will be stored in memory location but will not be dialed out.
4. R/P and */T keys can be stored as a digit in memory.
In store mode, R/P is the pause function key.
5. The store mode is released after the store function is executed or when the state of the hook
switch is changed.
&
),
S , D1 ,
, ..., Dn , S , Ln
Repertory Dialing
OFF HOOK , (or ON HOOK
&
),
A , Ln
Access Pause
OFF HOOK , (or ON HOOK
1. The pause function can be stored as a digit in memory.
&
),
D1 , D2 , R/P , D3 , ..., Dn
Publication Release Date: May 1997
- 5 - Revision A2
Loading...