ADM208EARS

Overview

The ADM208EARSZ is a robust RS-232 line driver and receiver manufactured by Analog Devices. It operates from a single 5 V power supply and provides four drivers and four receivers for full-duplex communication. The device supports data rates up to 230 kbps and includes an internal charge pump requiring only four external 0.1 μF capacitors. It features ±15 kV ESD protection on all I/O lines, complies with the EU EMC directive (89/336/EEC), and eliminates the need for external TransZorb suppressors. Operating temperature ranges from -40°C to +85°C.

Feature Summary

• Complies with the EU directive on electromagnetic compatibility (EMC) including low EMI emissions.
• Provides high-level electrostatic discharge (ESD) protection exceeding ±15 kV on all I/O lines.
• Operates from a single 5 V power supply using an internal charge pump.
• Suitable for harsh electrical environments with fast transient burst immunity.

Applications

• Laptop computers
• Notebook computers
• Printers
• Peripherals
• Modems

Procurement Notes

Verify the specific package variant when ordering, as the base model number corresponds to multiple physical packages. Confirm that the SSOP-24 or TSSOP-24 configuration matches the target PCB footprint requirements. Ensure compliance with RoHS directives if required by the manufacturing environment. Cross-reference the exact suffix to guarantee the correct lead frame and body dimensions for assembly processes.

Selection Notes

Select this component when designing systems requiring four independent RS-232 channels without shutdown control pins. Verify that the application does not require active low-power standby modes, as this specific variant lacks enable or shutdown functionality. Ensure the design accommodates the necessary four external capacitors for the internal voltage converters. Confirm that the 230 kbps maximum data rate meets the system's transmission speed requirements.

Part Context

This part belongs to the ADM2xxE family of ruggedized RS-232 interface devices. It serves as a plug-in upgrade for older MAX2xxE series products, facilitating easy design transitions. The family shares common architectural features, including single-supply operation and integrated charge pumps, while varying in channel count and control pin availability across models like the ADM206E, ADM207E, and ADM211E.

Replacement Considerations

The ADM208EARSZ is backward compatible with earlier ADM2xx products. Designers upgrading from legacy designs should verify pinout compatibility with previous generations. Alternative options within the same family include the ADM206E or ADM207E, depending on whether three or five receivers are needed instead of four.