MAX3227EETE+

Overview

The MAX3227EETE+ is a single-driver, single-receiver full-duplex RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a +3.0V to +5.5V supply and guarantees a data rate of 1Mbps. The device features AutoShutdown Plus technology, reducing supply current to 1μA when idle. It includes ±15kV ESD protection on all I/O pins and provides a READY output signal. Packaged in a 16-pin TQFN with an exposed pad, it supports an industrial temperature range of -40°C to +85°C.

Feature Summary

• AutoShutdown Plus functionality automatically reduces power consumption by shutting down charge pumps during periods of inactivity.
• Integrated dual charge pump generates internal +5.5V and -5.5V supplies from a single low-voltage source.
• Enhanced electrostatic discharge protection ensures robustness against high-voltage static events.

Applications

• Notebook, Subnotebook, and Palmtop Computers
• Cellular Phones
• Battery-Powered Equipment

Procurement Notes

Verify the specific suffix 'EE' indicates the -40°C to +85°C temperature range and 'TE+' denotes the 16-TQFN package with lead-free/RoHS compliance. Confirm the exposed pad (EP) configuration matches the target PCB land pattern for proper thermal dissipation and grounding.

Selection Notes

Select this component for applications requiring a single channel with high-speed 1Mbps capability and strict power constraints. Ensure the design accommodates four external 0.1μF capacitors for the charge pump circuitry. Verify that the UART logic levels are compatible with the specified input thresholds.

Part Context

This part belongs to the MAX3224E–MAX3227E family of 3V-powered RS-232 transceivers. It shares core features like AutoShutdown Plus and ESD protection with siblings such as the MAX3224E and MAX3225E, differing primarily in driver/receiver count and guaranteed data rates.

Replacement Considerations

Public confirmed substitute part numbers: MAX3227ECTE+, MAX3227EEUE+, MAX3227CAE+, MAX3227EAE+T.

FAQ

How does the AutoShutdown Plus feature function?

It monitors receiver and transmitter inputs; if no valid transitions occur for more than 30 seconds, the device shuts down the charge pumps to achieve 1μA supply current.

What is the purpose of the READY output pin?

The READY output asserts high when the internal charge pumps are regulating and the device is ready to begin transmitting RS-232 signals.

What ESD protection ratings does the MAX3227E provide?

It provides ±15kV protection using the Human Body Model and IEC 1000-4-2 Air-Gap Discharge, and ±8kV using IEC 1000-4-2 Contact Discharge.