W91570DN

W91570DN SERIES 23-MEMORY TONE/PULSE DIALER WITH AUTOREDIAL RTC AND LCD DISPLAY FUNCTIONS GENERAL DESCRIPTION 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 in low voltage, low power applications. 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...