MAX3237EAI+T

Overview

The MAX3237EAI+T is a true RS-232 transceiver from the MAX3237E series, manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +3.0V to +5.5V supply and features five drivers and three receivers in a 28-pin SSOP package. The device guarantees data rates up to 250kbps in normal mode and 1Mbps in MegaBaud mode. It includes an integrated dual charge pump requiring only four 0.1µF external capacitors. Supply current drops to less than 1µA in shutdown mode. The component supports -40°C to +85°C operating temperatures and provides 15kV ESD protection on I/O pins.

Feature Summary

• Integrated dual charge pump eliminates the need for bipolar ±12V supplies
• MegaBaud operation enables transmission rates up to 1Mbps
• Always-active complementary receiver outputs allow monitoring without forward biasing protection diodes
• Shutdown mode reduces supply current to less than 1µA while maintaining receiver activity

Applications

• Battery-powered equipment
• Hand-held devices
• Peripherals
• Datacom equipment

Procurement Notes

Verify the ordering suffix '+T' corresponds to tape-and-reel packaging when sourcing components. Confirm the 'E' designation indicates the extended temperature range of -40°C to +85°C. Ensure compatibility with 28-SSOP footprints during procurement planning. Cross-reference manufacturer part numbers to avoid confusion with similar interface ICs.

Selection Notes

Select this component for designs requiring five transmitter channels and three receiver channels within a compact SSOP footprint. It is suitable for applications needing high-speed serial communication up to 1Mbps using standard 0.1µF capacitors. Consider the always-active complementary outputs for ring indicator detection in power-down scenarios. Verify logic family compatibility with the target microcontroller or UART interface.

Part Context

This device belongs to the MAX3222/MAX3232/MAX3237/MAX3241 family of low-power RS-232 transceivers. Unlike the MAX3241 which offers five receivers, the MAX3237 prioritizes additional driver channels. It shares the same proprietary low-dropout output stage and charge-pump architecture as its siblings, ensuring consistent performance across the product line.

Replacement Considerations

Public confirmed substitute part numbers include MAX3237EAI+ and MAX3237EAI-T.