[Novatek]

General Description

The NT91315XL series are single-chip silicon gate CMOS integrated circuits with on-chip oscillators to be used with a 3.58 MHz crystal or ceramic resonator. They provide dialing pulse (DP) or dual tone multi-frequency (DTMF) dialing. A 24-key (5x5-1) matrix keyboard is used for either DP or DTMF mode. In on-chip RAM, up to 32 digits can be saved for both redial and save functions, and up to 16 digits can be saved for 3 direct emergency and 10 indirect dialing memory banks. In DTMF mode, a small minimum tone duration and minimum inter-tone pause allows for rapid dialing. Maximum tone duration depends on the key depression time in manual dialing.

Features

■ Tone/Pulse switchable

■ 32-digit redial memory

■ 32-digit save memory (DL version)

■ 3 emergency memory banks (16 digits each)

■ 10 indirect memory banks (16 digits each)

■ Flash, Pause, P?T can be saved as a digit in memory

■ Chain dialing allowed

■ None or (0) or (0, 9) or (0, 168) or all digits dialing inhibition (diode option) for PABX system or long distance dialing lock out

■ Pause time 2.2/3.6 sec selectable (diode option)

■ 3 pulse dialing number systems N/N+1/10-N (diode option)

■ Dialing rate 10pps, M/B ratio 2/3 & 1/2 selectable/dialing rate 10pps & 20pps selectable, M/B ratio 1/2 (diode option)

■ Hands-Free control function with debouncing (BL, CL & DL version)

■ Hold function with debouncing (CL & DL version)

■ Key-tone output for dialing access (DL version)

■ One-key redial (DL version)

■ Flash time 600ms, 300ms, 100ms (DL version)

■ Power-up reset circuit provided

■ Key release debouncing

■ 32-step synthetic tone output for low DTMF output harmonic distortion

■ 16/18/20/22-pin packages