W91572DN - Winbond

W91572DN 23-MEMORY TONE/PULSE DIALER

The W91570DN series ICs are Si-gate CMOS ICs that provide the signals needed for either pulse or tone dialing. They feature 23 number memories and a 16-digit LCD driver for displaying telephone numbers and calling time. A real time clock is included to display the time of day. The W91570DN series is fabricated using CMOS technology providing good performance.

Features

• Three by 32 digits for redial, save and mercury memory
• Twenty by 16 digits for one-touch direct or two-touch indirect repertory memory
• Uses 6 × 10 keyboard
• Pause, Pulse-to-tone (
*/T) and flash can be stored as a digit in memory
• Minimum tone output duration: 87 mS
• Minimum intertone pause: 87 mS
• Tone/Pulse mode pin selectable
• Make/Break ratio pin selectable
• Dialing rate (10 or 20 ppS) pin selectable
• Pause time (2.0 or 3.6 Sec) select.