MAX221EEUE+T

Overview

The MAX221EEUE+T is a single RS-232 transceiver powered by a +5V supply, featuring AutoShutdown technology to reduce power consumption. It operates within a temperature range of -40°C to +85°C and utilizes a 16-pin TSSOP package. The device guarantees a maximum data rate of 250kbps with a typical propagation delay of 0.15µs. Supply current drops to 1µA during shutdown, while normal operation draws approximately 5mA. It includes internal charge pumps requiring four 0.1µF capacitors.

Feature Summary

• AutoShutdown functionality reduces supply current to 1µA when no valid RS-232 signal is detected
• Integrated dual charge pump generates required positive and negative voltages from a single +5V source
• INVALID output pin indicates the presence of active RS-232 communication signals

Applications

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

Procurement Notes

Verify that the component matches the specific E-grade temperature rating (-40°C to +85°C) and the TSSOP-16 package configuration. Confirm the suffix +T corresponds to the reel packaging format if applicable for automated assembly processes. Ensure compatibility with existing BIOS or operating system configurations as the AutoShutdown feature operates independently without software modifications.

Selection Notes

Select this component for applications requiring low-power standby modes in single-channel RS-232 interfaces. It serves as an upgrade to standard transceivers by eliminating external voltage regulators through integrated charge pumps. Consider the 250kbps speed limit and ensure load conditions remain within specified resistance and capacitance ranges for optimal performance.

Part Context

This part belongs to the MAX221E family of single RS-232 transceivers designed for +5V operation. It shares functional similarities with other Maxim Integrated interface ICs but distinguishes itself through the proprietary AutoShutdown mechanism. The EE designation indicates extended industrial temperature ratings compared to commercial variants.

Replacement Considerations

The MAX221CUE is a pin-compatible alternative offering similar functionality but with a commercial temperature range (0°C to +70°C). Verify thermal requirements before substitution, as the C-grade variant lacks the extended low-temperature capability of the E-grade MAX221EEUE+T.