描述 Description

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

特性 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?