ADM208ARS

Overview

The ADM208ARS is a CMOS RS-232 line driver and receiver integrated circuit manufactured by Analog Devices Inc. It operates from a single +5 V power supply and incorporates on-board DC-DC converters to generate the required ±9 V output swings, eliminating the need for external dual-voltage sources. The device supports data rates up to 120 kb/s and features four drivers and four receivers in full-duplex operation. Designed for EIA-232-E and V.28 interfaces, it accepts ±30 V input levels on receivers. The component is housed in a 24-pin SOIC package and functions within an operating temperature range of -40°C to +85°C with a typical supply current of 9 mA.

Feature Summary

• Integrated charge pump circuitry generates internal high voltages from a single 5 V supply
• Provides robust receiver input tolerance against high voltage transients
• Supports standard serial communication protocols without external dual-rail power supplies

Applications

• Industrial control systems requiring reliable serial communication
• Embedded computer peripherals and instrumentation interfaces
• Modem and printer connection circuits in constrained power environments

Procurement Notes

Verify the specific suffix 'AR' corresponds to the intended temperature grade and package variant during sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor declarations prior to procurement. Ensure the ordering information matches the exact pinout and electrical specifications required for the target design implementation.

Selection Notes

Select this component when designing systems limited to a single 5 V rail but requiring standard RS-232 signaling levels. It serves as a direct replacement for legacy MAX205-MAX213 series devices where space and component count reduction are priorities. Evaluate the 120 kb/s speed limit to ensure compatibility with the application's baud rate requirements before finalizing the bill of materials.

Part Context

The ADM208 belongs to the ADM2xx family of low-power RS-232 transceivers designed for battery-powered and space-constrained applications. Unlike earlier generations requiring external capacitors for charge pumping, this series integrates the necessary conversion circuitry. It maintains pin compatibility with popular industry-standard alternatives, facilitating upgrades in existing designs without significant layout modifications.

Replacement Considerations

The ADM208AN and ADM208ARZ are functionally equivalent variants within the same product family. Verify that the suffix indicates the correct package type and environmental rating for the specific assembly process.