W91F820N Datasheet, PDF (1/20 Pages) Winbond – 13-FLASH MEMORY TONE/PULSE DIALER WITH HANDFREE, LOCK AND HOLD FUNCTIONS

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