MAX3237EAI+

Overview

The MAX3237EAI+ is a low-power RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +3.0V to +5.5V supply and features five drivers and three receivers in a full-duplex configuration. The device utilizes a dual charge pump requiring only four 0.1µF external capacitors. In normal mode, it guarantees data rates up to 250kbps; MegaBaud operation enables speeds up to 1Mbps. It includes shutdown functionality with less than 1µA supply current and complementary receiver outputs for continuous monitoring.

Feature Summary

• MegaBaud operation supports high-speed serial communications up to 1Mbps
• Complementary receiver outputs remain active during shutdown for ring indicator applications
• Integrated dual charge pump eliminates the need for bipolar ±12V supplies
• 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 component origin through official manufacturer documentation or authorized distributor channels. Confirm that the ordering suffix corresponds to the specified lead-free package and temperature range. Ensure compatibility with system voltage requirements and interface standards before integration.

Selection Notes

Select this component when designing systems requiring multiple transmitter lines alongside fewer receiver inputs. The inclusion of always-active complementary outputs facilitates power-down monitoring without forward biasing protection diodes. Verify capacitor values against Table 2 in the datasheet for specific supply voltages to ensure stable charge-pump operation.

Part Context

This part belongs to the MAX3222/MAX3232/MAX3237/MAX3241 family of true RS-232 transceivers. Unlike the MAX3241 which offers five receivers, the MAX3237 provides three receivers and five drivers. It shares the same proprietary low-dropout output stage and 0.1µF capacitor requirement as its siblings.

Replacement Considerations

MAX3237CAI+