DESCRIPTION

The SGS-THOMSON Microelectronics ST75C520 chip is a highly integrated modem engine, which can operate with all currently used FAX group III standards up to 14400bps. Full V.21, V.23 and Bell 103 full duplex modem standards are implemented.

■ ITU-T V.17, V.29, V.27ter, V.21 WITH FAX SUPPORT

■ ITU-T V.23, V.21, BELL 103

■ V.17, V.29 (T104), V.27ter SHORT TRAINS

■ V.33 HALF-DUPLEX

■ 1800Hz OR 1700Hz CARRIER

■ SINGLE CHIP COMPLETE DATA PUMP

■ SINGLE 5V POWER SUPPLY :

- TYPICAL ACTIVE POWER CONSUMPTION : 375mW

- LOW POWER MODE (typ. 5mW)

■ EXTENDED MODES OF OPERATIONS :

- FULL IMPLEMENTATION OF THE V.17, V.33, V.29 AND V.27ter HANDSHAKES

- AUTODIAL AND AUTOANSWER CAPABILITY

- PROGRAMMABLE TONE DETECTION AND FSK V.21 FLAG PATTERN DETECTION DURING HIGH SPEED RECEPTION

- PROGRAMMABLE CALL PROGRESS AND CALL WAITING TONE DETECTORS INCLUDING DTMF

- PROGRAMMABLE CLASS™ DETECTION CAPABILITY

- WIDE DYNAMIC RANGE (>48dB)

- A-LAW VOICE PCM MODE

■ VERSATILE INTERFACES :

- PARALLEL 64 x 8-BIT DUAL PORT RAM

- SYNCHRONOUS/HDLC PARALLEL DATA HANDLING

- HDLC FRAMING SUPPORT

- V.24 INTERFACE

- FULL OPERATING STATUS REAL TIME MONITORING

- FULL DIAGNOSTIC CAPABILITY

- DUAL 8-BIT DAC FOR CONSTELLATION DISPLAY