MAX211EEAI+T

Drivers, Receivers, Transceivers Overview

The MAX211EEAI+T is a full-duplex RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It integrates four drivers and five receivers, operating on a single +5V supply via an internal charge pump. The device supports data rates up to 120kbps with ±15kV HBM ESD protection. It features a shutdown mode reducing current to 1µA and an enable pin for high-impedance receiver states. The component is housed in a 28-pin SSOP package and operates within a temperature range of -40°C to +85°C.

Drivers, Receivers, Transceivers Feature Summary

• Integrated dual charge-pump circuitry eliminates the need for external bipolar power supplies.
• Provides robust ±15kV electrostatic discharge protection on all RS-232 pins.
• Includes low-power shutdown control to minimize energy consumption during idle periods.
• Features receiver enable functionality to support wired-OR port configurations.

Drivers, Receivers, Transceivers Applications

• Battery-powered portable equipment
• Hand-held diagnostic devices
• Notebook computers requiring frequent serial connection changes

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing. Confirm the 'EE' designation corresponds to the extended industrial temperature range of -40°C to +85°C. Ensure compatibility with 28-pin SSOP footprints during procurement planning.

Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring multiple driver and receiver channels within a compact footprint. The integrated charge pump simplifies board layout by removing the requirement for negative voltage generation. Verify that the 120kbps maximum data rate meets system timing requirements.

Drivers, Receivers, Transceivers Part Context

This part belongs to the MAX202E-MAX213E family of RS-232 transceivers. It shares architectural similarities with the MAX213E but lacks the awake-in-shutdown receiver capability found in that variant. The device is designed to replace older discrete RS-232 interface solutions.

Drivers, Receivers, Transceivers Replacement Considerations

MAX211EWI+ is a parameter-equivalent alternative available in a 28-SOIC package. Both parts share identical electrical specifications and pinouts, differing primarily in the physical package style.

Drivers, Receivers, Transceivers FAQ

What is the function of the EN pin?

The EN pin puts the receiver outputs into a high-impedance state, allowing for wired-OR connections of multiple RS-232 ports at the UART without affecting the drivers or charge pumps.

How does the shutdown mode affect the charge pump?

In shutdown mode, the charge pumps are turned off, V+ is pulled down to VCC, and V- is pulled to ground, significantly reducing supply current to typically 1µA.

Are unused driver inputs required to be connected?

No, unused driver inputs can be left unconnected because the MAX211E includes internal 400kΩ pull-up resistors to VCC that force the outputs low.