W91F822AN PDF даташит
Спецификация W91F822AN изготовлена «Winbond» и имеет функцию, называемую «13-FLASH MEMORY TONE/PULSE DIALER WITH HANDFREE/ LOCK AND HOLD FUNCTIONS». |
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Детали детали
Номер произв | W91F822AN |
Описание | 13-FLASH MEMORY TONE/PULSE DIALER WITH HANDFREE/ LOCK AND HOLD FUNCTIONS |
Производители | Winbond |
логотип |
20 Pages
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Preliminary W91F820N SERIES
13-FLASH MEMORY TON/PULSE DIALER WITH
HANDFREE, LOCK AND HOLD FUNCTIONS
GENERAL DESCRIPTION
The W91F820N is a series of tone/pulse switchable telephone dialers with 13-flash memory, keytone,
hold, lock, and handfree dialing control features. These chips are fabricated using Winbond's high-
performance CMOS technology and thus offer good performance in low-voltage, low-power
operations.
FEATURES
• Tone/pulse switchable dialer
• Two by 32 digits redial and save memory
• Three by 32 digits one-touch direct repertory flash memory
• Ten by 32 digits one-touch direct or two-touch indirect repertory flash memory
• The read-write times: 104
• Pulse-to-tone (*/T) keypad for long distance call operation
• Chain dialing
• Uses 5 × 5 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 by mask option
• Minimum tone output duration: 93 mS
• Minimum intertone pause: 93 mS
• Pause time: 3.6 sec.
• Flash break time (73 mS, 100 mS, 300 mS, or 600 mS) selectable by keypad; pause time is 1.0 S
• Make/break ratio (2:3 or 1:2) selectable by MODE pin
• Mute key for speech network mute
• No key will be accepted except the "HOLD" key when in the Hold mode
• Key tone output for valid keypad entry recognition
• On-chip power-on reset
• Uses 3.579545 MHz crystal or ceramic resonator
• 20-pin 300 mil, or 22-pin 400 mil dual-in-line plastic package
• The different dialers in the W91F820N series are shown in the following table:
TYPE NO.
W91F820N
W91F820AN
W91F820LN
W91F820ALN
W91F822N
W91F822AN
PULSE
(PPS)
10
10
10
10
20
20
LOCK
-
-
√
√
-
-
KEY
TONE
√
√
-
-
√
√
HANDFREE
DIALING
-
√
-
√
-
√
PACKAGE
(PINS)
20
22
20
22
20
22
Publication Release Date: January 1999
- 1 - Revision A1
No Preview Available ! |
PIN CONFIGURATIONS
Preliminary W91F820N SERIES
C1
C2
C3
C4
KT
H/P MUTE
VSS
XT
XT
T/P MUTE
1 20
2 19
3 18
4 17
5 16
6 15
7 14
8 13
9 12
10 11
W91F820N/822N
R4
R3
R2
R1
N.C.
VDD
MODE
DTMF
DP
HKS
C1
C2
C3
C4
KT
H/P MUTE
VSS
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
W91F820AN/822AN
R4
R3
R2
R1
N.C.
VDD
MODE
DTMF
DP
HKS
HFO
C1
C2
C3
C4
LOCK
H/P MUTE
VSS
XT
XT
T/P MUTE
1 20
2 19
3 18
4 17
5 16
6 15
7 14
8 13
9 12
10 11
W91F820LN
R4
R3
R2
R1
N.C.
VDD
MODE
DTMF
DP
HKS
C1
C2
C3
C4
LOCK
H/P MUTE
VSS
XT
XT
T/P MUTE
HFI
1 22
2 21
3 20
4 19
5 18
6 17
7 16
8 15
9 14
10 13
11 12
W91F820ALN
R4
R3
R2
R1
N.C.
VDD
MODE
DTMF
DP
HKS
HFO
-2-
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Preliminary W91F820N SERIES
PIN DESCRIPTION
SYMBOL 20-PIN 22-PIN I/O
FUNCTION
Column- 1−4
Row Inputs &
17−20
1−4
&
19−22
I The keyboard input is compatible with a standard 5 × 5
keyboard, an inexpensive single contact (Form A) keyboard,
and electronic input.
In normal operation, any single button can be pushed to
produce dual tone, pulses, or functions. Activation of two or
more buttons will result in no response except for a single
tone.
XT 8
XT
T/P MUTE
9
10
N.C.
MODE
16
14
HKS
11
8 I A built-in inverter together with an inexpensive 3.579545 MHz
crystal supplies the oscillator. The oscillator stops when there
is no keypad input. The crystal frequency deviation is 0.02%.
9 O Crystal oscillator output pin.
10 O The T/P MUTE is a conventional CMOS N-channel open
drain output.
The output transistor turns on with a low level during a dialing
sequence (both pulse and tone mode). Otherwise, it is off.
18 - No connect
16 I Connecting the mode pin to VSS places the dialer in tone mode.
Connecting the mode pin to VDD places the dialer in pulse
mode with an M/B ratio of 40:60.
Leaving the mode pin floating places the dialer in pulse mode
with an M/B ratio of 33.3:66.7.
13 I The HKS (hook switch) input is used to sense whether the
handset is on-hook or off-hook.
In on-hook state, HKS = 1: chip is in sleeping mode, no operation.
In off-hook state, HKS = 0: chip is enabled for normal operation.
KT
(W91F820N/
F820AN/
F822N)
LOCK
(W91F820LN/
820ALN only)
5
5
HKS pin is pulled to VDD by internal resistor.
5 O The key tone output is a conventional CMOS inverter. The
key tone is generated when any valid key is pressed; the KT
pin generates a 1.2 KHz square wave at 35 mS. When no key
is pressed, the KT pin remains in low state.
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.
The function of the LOCK pin is shown below:
LOCK PIN
V DD
Floating
V SS
FUNCTION
"0", "9" dialing inhibited
Normal dialing Mode
"0" dialing inhibited
Publication Release Date: January 1999
- 3 - Revision A1
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Номер в каталоге | Описание | Производители |
W91F822AN | 13-FLASH MEMORY TONE/PULSE DIALER WITH HANDFREE/ LOCK AND HOLD FUNCTIONS | Winbond |
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