MAX3237ECAI+T

Overview

The MAX3237ECAI+T is a true RS-232 transceiver manufactured by Analog Devices (Maxim Integrated) in an SSOP-28 package. It operates on a single +3.0V to +5.5V supply and features five drivers and three receivers. The device supports data rates up to 250kbps in normal mode and 1Mbps in MegaBaud mode. Operating supply current is typically 2mA, dropping to 10nA in shutdown with all receiver inputs invalid. ESD protection reaches ±15kV for logic and I/O pins. The operating temperature range is -40°C to +85°C.

Feature Summary

• Integrated dual charge pump generates internal ±5.5V supplies from a single low-voltage source using four small capacitors.
• MegaBaud mode enables high-speed serial communication at 1Mbps when the MBAUD pin is connected to VCC.
• Shutdown mode reduces power consumption significantly while keeping receiver outputs active for external monitoring.
• Complementary receiver outputs remain functional during shutdown to detect activity without forward biasing connected devices.

Applications

• Peripheral applications requiring fast data transfer
• Battery-powered equipment
• Cell-phone data cables

Procurement Notes

Verify the specific suffix 'EI' indicates the extended industrial temperature range of -40°C to +85°C. Confirm the '+T' designation corresponds to tape-and-reel packaging as specified in official documentation. Ensure compatibility with the required voltage levels and interface standards before finalizing procurement.

Selection Notes

Select this component for designs needing multiple transmitter channels and low standby power. The inclusion of complementary receiver outputs allows for ring indicator detection even when the main control logic is powered down. Verify that the application environment requires the extended temperature range provided by the EE suffix.

Part Context

This part belongs to the MAX3237E family of RS-232 transceivers designed for peripheral interfaces. It shares architectural similarities with the MAX3222E and MAX3241E but offers a distinct configuration of five drivers and three receivers optimized for complex peripheral connections rather than standard PC ports.

Replacement Considerations

The MAX3237EAI+T serves as a direct replacement for the MAX3237ECAI+T, differing only in the guaranteed operating temperature range of -40°C to +85°C compared to the commercial 0°C to +70°C range.