ADM208EARS-REEL

Overview

The ADM208EARS-REEL is an RS-232 line driver and receiver manufactured by Analog Devices Inc. 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 internal charge pumps 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. The component is housed in a 24-lead TSSOP package.

Feature Summary

• Complies with the EU directive on electromagnetic compatibility (EMC) including low EMI emissions.
• Provides robust electrostatic discharge (ESD) protection of ±15 kV on all input/output lines.
• Operates from a single 5 V power supply using internal charge pumps.
• Features Schmitt trigger inputs on receivers to ensure error-free reception of noisy signals.

Applications

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

Procurement Notes

Verify that the ordering suffix matches the required packaging format. The suffix 'REEL' indicates tape-and-reel packaging, which differs from tube packaging used for other variants. Confirm the specific pinout and package dimensions align with the design footprint before procurement.

Selection Notes

Select this component when four independent transmitters and receivers are required within a single IC. It serves as a plug-in upgrade for older MAX2xxE designs. Ensure the application environment requires high ESD immunity and compliance with strict EMC emission standards without additional suppression components.

Part Context

This part belongs to the ADM2xxE family of RS-232 interface devices designed for harsh electrical environments. The family includes variants like the ADM206E, ADM207E, ADM211E, and ADM213E, which differ in the number of drivers/receivers and the presence of shutdown or enable control pins. The ADM208E specifically lacks these control pins.

Replacement Considerations

The datasheet identifies the ADM208E as a plug-in upgrade for MAX2xxE series devices. Designers should verify pin compatibility and voltage levels when replacing legacy parts with this component.

FAQ

Does the ADM208E include a shutdown mode?

No, the ADM208E does not have a shutdown or enable control pin. Only the ADM211E and ADM213E models in this family provide shutdown functionality.

What is the maximum data rate supported by this device?

The device guarantees a maximum data rate of 230 kbps under worst-case loading conditions.

How many external capacitors are required for operation?

Four external 0.1 μF capacitors are required to support the internal charge pump voltage doubler and inverter circuits.