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GENERAL DESCRIPTION

The W91F810N is a series of tone/pulse switchable telephone dialers with 23-falsh memory, keytone, hold, lock, mute, volume control and handfree dialing control features. These chips are fabricated using Winbonds 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

? Twenty 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 6 ? 6 or 7 ? 7 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 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

? 4-level volume control by V1 and V2 pin - default value is zero

? Key tone output for valid keypad entry recognition

? On-chip power-on reset

? Uses 3.579545 MHz crystal or ceramic resonator

? 22-pin 400 mil, 24-pin 600 mil or 28-pin 600 mil dual-in-line plastic package

? The different dialers in the W91F810N series are shown in the following table: