E-ST7538P

Overview

The E-ST7538P is a half-duplex synchronous/asynchronous FSK modem designed for power line communication networks. It integrates a line driver and two linear regulators for 5V and 3.3V outputs. The device operates from a single supply voltage and is controlled via an internal register programmable through a synchronous serial interface. Key features include watchdog timer, clock output, output voltage and current control, preamble detection, time-out, and band-in-use detection. Manufactured using Multipower BCD5 technology, it supports baud rates up to 4800BPS and is compatible with the ST7537. The component is housed in a 44-TQFP (10x10) package with exposed pad.

Feature Summary

• Integrates line driver and dual linear regulators for 5V and 3.3V supplies
• Supports programmable baud rates up to 4800BPS with FSK modulation
• Includes internal register control via synchronous serial interface
• Features built-in watchdog timer, preamble detection, and band-in-use monitoring

Applications

• Power line communication network applications
• Residential or industrial narrowband LAN systems
• Automatic meter reading and remote control systems
• Street lighting management networks

Procurement Notes

Verify component status as the E-ST7538P is listed as obsolete by the manufacturer. Confirm availability of alternative packages such as the ST7538P013TR in tape and reel format if surface mount volume production is required. Ensure compatibility with existing design infrastructure before finalizing procurement plans due to end-of-life status.

Selection Notes

Select this component for applications requiring half-duplex FSK modulation over power lines with integrated voltage regulation. Verify that the host system can support the synchronous serial interface for register programming. Consider the operating temperature range of -40°C to +85°C for environmental suitability. Check if the 4800BPS maximum baud rate meets data throughput requirements.

Part Context

The E-ST7538P belongs to the ST7538 series of power line modems. It is functionally compatible with the ST7537. The 'E-' prefix typically denotes an engineering sample or specific packaging variant distinct from the standard commercial part numbers like ST7538Q. It utilizes Multipower BCD5 technology to integrate DMOS, Bipolar, and CMOS structures on a single chip.

Replacement Considerations

The ST7538P013TR is a verified replacement option available in tape and reel packaging. Both components share the same core functionality and pinout. Verify that the change in packaging does not impact thermal performance or mechanical fit within the target enclosure.