MAX3237CAI-T

Overview

The MAX3237CAI-T is a true RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 28-pin SSOP package. It operates from a single +3.0V to +5.5V supply and features five drivers and three receivers. The device utilizes an internal dual charge pump requiring only four 0.1µF external capacitors. In normal mode (MBAUD = GND), it guarantees data rates up to 250kbps. In MegaBaud mode (MBAUD = VCC), it supports speeds up to 1Mbps with specific load conditions. The component includes shutdown functionality reducing supply current to less than 1µA and complementary receiver outputs for continuous monitoring.

Feature Summary

• Integrated dual charge pump eliminates the need for bipolar ±12V supplies
• MegaBaud operation enables high-speed serial communication up to 1Mbps
• Always-active complementary receiver outputs allow peripheral monitoring during shutdown

Applications

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

Procurement Notes

Verify the ordering suffix 'T' indicates tape-and-reel packaging when sourcing components. Confirm that the 'C' designation corresponds to the commercial temperature range of 0°C to +70°C. Ensure compatibility with the 28-pin SSOP footprint during procurement planning.

Selection Notes

Select this model for designs requiring five transmitter channels and three receiver channels on a single IC. It is suitable for applications needing high-speed transmission via MegaBaud mode or standard low-power operation. Verify that the system can accommodate the required four external charge-pump capacitors within the layout constraints.

Part Context

This component belongs to the MAX3222/MAX3232/MAX3237/MAX3241 family of low-power RS-232 transceivers. Unlike the MAX3222 or MAX3232 which offer two drivers and receivers, the MAX3237 provides expanded I/O capabilities with five drivers and three receivers, making it distinct within the series for multi-channel serial interfaces.

Replacement Considerations

The MAX3237EAI+ serves as a direct functional replacement offering an extended industrial temperature range (-40°C to +85°C) while maintaining identical pinout and electrical characteristics.