MAX3221EEUE+T

Overview

The MAX3221EEUE+T is a single-driver, single-receiver RS-232 transceiver designed for EIA/TIA-232 and V.28/V.24 communications interfaces. It operates from a +3.0V to +5.5V supply and achieves a typical supply current of 1µA through the AutoShutdown feature, which disables the charge pump and drivers when no valid signal levels are detected on receiver inputs for 30µs. The device guarantees data rates up to 250kbps while maintaining true RS-232 output levels. All transmitter outputs and receiver inputs provide enhanced electrostatic discharge protection rated at ±15kV using the Human Body Model, ±8kV via IEC 1000-4-2 Contact Discharge, and ±15kV via IEC 1000-4-2 Air-Gap Discharge.

Feature Summary

• AutoShutdown functionality reduces power consumption by entering low-power mode when the RS-232 cable is disconnected or peripheral transmitters are off.
• Integrated dual charge pump generates internal +5.5V and -5.5V supplies from a single +3.0V to +5.5V source using only four small capacitors.
• Enhanced ESD protection structures safeguard all transmitter outputs and receiver inputs against high-voltage static discharges without latchup.

Applications

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

Procurement Notes

Verify that the ordering suffix 'T' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the 'EE' designation indicates the extended temperature range of -40°C to +85°C suitable for industrial environments. Ensure compatibility with the specific TSSOP-16 footprint during PCB layout verification.

Selection Notes

Select this component when a single-channel RS-232 interface is required alongside strict power management constraints. The integrated AutoShutdown feature eliminates the need for external control logic to manage power states. Verify that the application does not require higher data rates than 250kbps or additional driver/receiver channels found in the MAX3223E or MAX3243E variants.

Part Context

This part belongs to the MAX3221E/MAX3223E/MAX3243E family of 3V-powered RS-232 transceivers. While the MAX3223E provides two drivers and receivers, and the MAX3243E offers three drivers and five receivers, the MAX3221E specifically contains one driver and one receiver. This configuration makes it the smallest single-supply RS-232 transceiver available in the series.

Replacement Considerations

Public confirmed substitute part numbers: MAX3221EEUE+