SA2532KA

sames Key Features SA2532KA/B SINGLE CHIP TELEPHONE FOR INDIA Speech Circuit, LD/MF Dialler and Tone Ringer on one 28 pin CMOS chip Low Noise 31 digit Last Number Redial Line Loss Compensation selectable by pin option 2 Timed Break Recall keys Moving Cursor protocol with comparison On chip MF filter (CEPT CS 203 compatible) Pause key for auto pause or wait function Power down mode Ring frequency discrimination Selectable Loop-Disconnect or DTMF dialling modes Real or complex impedance programmable Soft Clipping to avoid harsh distortion Uses inexpensive 3.58MHz ceramic resonator Operating range from 13 to 100 mA 3 Tone melody generator General Description The SA2532K is a CMOS integrated circuit that contains all the functions needed to form a high performance electronic telephone. The device incorporates LD/MF repertory dialling, melody generation, ring frequency discrimination and a high quality speech circuit. Soft switch into temporary MF mode using * when LD mode is selected .Timed Break Recall will be available in both LD and MF dialling modes. A 31 digit Last Number Redial (LNR) memory, with moving cursor protocol, activated by single key depression. Line Loss Compensation whereby send and receive gains are adjusted (by 6dB) over the ranges selected by the LLC pin. Block Diagram hook + LI LS STB + RI A GND CS BJT LINE CURRENT SENSE + RO1 RO2 + SA2532K V DD M1 V DD V SS SOFT CLIP M2 MO MELODY SEQUENCER TONE GENERATOR...