MAX3244EEWI+T

Overview

The MAX3244EEWI+T is a low-power RS-232 transceiver featuring AutoShutdown Plus technology. It operates from a single +3.0V to +5.5V supply and achieves a typical supply current of 1µA in shutdown mode. The device integrates three drivers and five receivers, supporting full-duplex communication with a guaranteed data rate of 250kbps. It utilizes a dual charge pump requiring only four 0.1µF capacitors for operation at 3.3V. The component includes an INVALID output for signal detection and R2OUTB for continuous receiver monitoring. It is housed in a 28-pin Wide SOIC package and supports industrial temperature ranges.

Feature Summary

• AutoShutdown Plus functionality automatically reduces power consumption when the interface is idle or disconnected.
• Integrated dual charge pump generates required RS-232 voltages using minimal external capacitance.
• Dedicated R2OUTB pin provides active monitoring of receiver inputs during system shutdown states.

Applications

• Notebook, subnotebook, and palmtop computers
• Cellular phones and handheld equipment
• Battery-powered peripherals and printers

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging configuration. Confirm the 'E' designation corresponds to the extended industrial temperature range specifications. Ensure compatibility with the required 28-pin Wide SOIC footprint during procurement planning.

Selection Notes

Select this model for applications requiring automatic power management without BIOS modifications. Choose over standard variants if the 250kbps data rate meets system requirements while minimizing power usage. Verify that the 28-pin package dimensions align with the target PCB layout constraints.

Part Context

This component belongs to the MAX3224–MAX3245 family of 3V-powered EIA/TIA-232 interfaces. It shares core architecture with the MAX3245 but differs in maximum guaranteed data rate capabilities. The family emphasizes low-power operation through proprietary shutdown logic compatible with existing operating systems.

Replacement Considerations

Public confirmed substitute part numbers include MAX3244EEWI (non-tape version) and MAX3244EWI+. Verify package type and temperature grade equivalence before substitution.