MAX221EEAE+T

Overview

The MAX221EEAE+T is a single RS-232 transceiver powered by a +5V supply, housed in a 16-pin SSOP package. It features an AutoShutdown function that reduces the supply current to 1µA when no valid signal is detected for 30µs. The device guarantees a maximum data rate of 250kbps with worst-case loads of 3kΩ in parallel with 1000pF. Operating temperature range is -40°C to +85°C. Internal dual charge pumps generate ± voltages from the single +5V source using four external 0.1µF capacitors.

Feature Summary

• AutoShutdown technology automatically enters low-power mode upon cable disconnection or peripheral power-off without BIOS modifications
• Integrated dual charge pump generates internal positive and negative voltage rails from a single +5V supply
• INVALID output pin indicates active communication link status to host systems

Applications

• Maintenance and diagnostic ports
• Industrial control systems
• Telecommunications equipment
• Set-top boxes

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature grade. Confirm RoHS compliance status through manufacturer certificates. Check for obsolescence notices or product change notifications prior to finalizing procurement plans.

Selection Notes

Select this component for applications requiring minimal board space and ultra-low standby power consumption. Ensure the design accommodates the required four external capacitors for the charge pump circuitry. Verify that the system can tolerate the wake-up time associated with exiting the shutdown state.

Part Context

This part belongs to the MAX220–MAX249 family of +5V-powered multichannel RS-232 drivers and receivers. The family provides various channel configurations and package options designed for EIA/TIA-232E and V.28/V.24 communications interfaces where ±12V supplies are unavailable.

Replacement Considerations

Refer to the MAX221E datasheet for equivalent RS-232 transceivers featuring enhanced ±15kV ESD protection capabilities.