GENERAL DESCRIPTION

The SA2532 is a CMOS integrated circuit that contains all the functions needed to form a high performance electronic telephone. The device incorporates LD/MF dialling, melody generation, ring frequency discrimination and a high quality speech circuit. A RAM is on chip for a 31 digit last number redial. The sliding cursor procedure makes Last Number Redial easy behind a PABX.

FEATURES

Speech circuit, LD/MF Dialler and Tone Ringer on one 28 pin CMOS chip

Soft clip to avoid harsh distortion

Line Loss Compensation selectable by pin option

Power down mode

Versatile applications for different PTT demands

31 digit last number redial

Sliding Cursor protocol with comparison

2 Flash keys, 100 ms and 280 ms (option 600 ms)

Pause key for 3 sec Auto Pause or Wait Function

Ring frequency discrimination

Operating range from 13 to 100 mA (down to 5 mA with reduced performance)

Low noise (max. -72dBmp)

Real or Complex impedance on chip programmable

LD/MF switchable dialling

On chip MF filter (CEPT CS 203 compatible)

3-tone melody generator with selectablerepetition rates