MAX3237EAI

Overview

The MAX3237EAI+ is a true RS-232 transceiver from the MAX3222/MAX3232/MAX3237/MAX3241 family, 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 supports 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. Shutdown current is typically 1µA with the receiver active.

Feature Summary

• Integrated dual charge pump eliminates the need for bipolar ±12V supplies
• Always-on complementary receiver outputs enable monitoring without forward biasing protection diodes
• Low-power shutdown mode extends battery life in portable applications

Applications

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

Procurement Notes

Verify the specific suffix (e.g., EAI+) against official manufacturer documentation to confirm temperature range and lead-free status. Confirm pinout compatibility if replacing legacy components like the MAX232. Ensure external capacitor values match the required minimums for the target supply voltage to maintain proper charge pump operation.

Selection Notes

Select this component when five transmitter channels and three receiver channels are required within a single IC. Consider the MegaBaud feature for high-speed serial communication needs up to 1Mbps. Verify that the 28-pin SSOP footprint fits the design constraints compared to alternative packages like TSSOP or SO.

Part Context

This part belongs to the MAX32xx series of low-power RS-232 transceivers. It shares architectural similarities with the MAX3222, MAX3232, and MAX3241 but offers a unique driver-to-receiver ratio optimized for complex interface designs. The 'E' designation indicates an extended industrial temperature range.

Replacement Considerations

MAX3237ECAI+