MAX3221EETE+

Overview

The MAX3221EETE+ is a single-driver, single-receiver RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a +3.0V to +5.5V supply and supports data rates up to 250kbps. The device features an AutoShutdown function that reduces supply current to 1µA when no valid signal is detected. It includes ±15kV ESD protection on all I/O pins and utilizes a dual charge pump requiring four 0.1µF capacitors. The component is housed in a 16-pin TQFN-EP package and is rated for an operating temperature range of -40°C to +85°C.

Feature Summary

• AutoShutdown technology enables ultra-low power consumption by automatically disabling the charge pump and drivers when the RS-232 cable is disconnected or peripheral transmitters are off.
• Integrated dual charge pumps generate true RS-232 voltage levels from low-voltage supplies using only small external capacitors.
• Enhanced electrostatic discharge protection ensures robustness against high-voltage static events without latch-up risks.

Applications

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

Procurement Notes

Verify the specific suffix EEAE indicates the extended industrial temperature range (-40°C to +85°C) and TQFN-EP packaging configuration. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure ordering details match the exact part number to avoid functional discrepancies related to package type or thermal rating.

Selection Notes

Select this component for applications requiring minimal board space due to its compact TQFN-EP footprint. It is suitable for systems where battery life is critical, leveraging the 1µA shutdown current. Ensure the design accommodates the required four 0.1µF capacitors for the internal charge pump operation within the specified voltage range.

Part Context

This device belongs to the MAX3221E/MAX3223E/MAX3243E family of 3V-powered RS-232 transceivers. While the MAX3221E provides one driver and receiver, other family members offer increased channel counts. All variants share the same core AutoShutdown functionality and ESD protection specifications.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.