DESCRIPTION

The ST7538 is a Half Duplex synchronous/asynchronous FSK Modem designed for power line communication network applications. It operates from a single supply voltage and integrates a line driver and a 5V linear regulator. The device operation is controlled by means of an internal register, programmable through the synchronous serial in terface. Additional functions as watchdog, clock output, output voltage and current control, preamble detection, time-out, band in use are included. Realized in Multipower BCD5 technology that allows to integrate DMOS, Bipolar and CMOS structures in the same chip.

FEATURES

■ HALF DUPLEX FREQUENCY SHIFT KEYING (FSK) TRANSCEIVER

■ INTEGRATED POWER LINE DRIVER WITH PROGRAMMABLE VOLTAGE AND CURRENT CONTROL

■ PROGRAMMABLE INTERFACE:

   – SYNCHRONOUS

   – ASYNCHRONOUS

■ SINGLE SUPPLY VOLTAGE (FROM 7.5 UP TO 12.5V)

■ VERY LOW POWER CONSUMPTION (Iq=5 mA)

■ INTEGRATED 5V VOLTAGE REGULATOR (UP TO 100mA) WITH SHORT CIRCUIT PROTECTION

■ 8 PROGRAMMABLE TRANSMISSION FREQUENCIES

■ PROGRAMMABLE BAUD RATE UP TO 4800BPS

■ RECEIVING SENSITIVITY 250µVRMS

■ SUITABLE TO APPLICATION IN ACCORDANCE WITH EN 50065 CENELEC SPECIFICATIONS

■ CARRIER OR PREAMBLE DETECTION

■ BAND IN USE DETECTION

■ PROGRAMMABLE REGISTER WITH SECURITY CHECKSUM

■ MAINS ZERO CROSSING DETECTION AND SYNCHRONIZATION