MAX3222EEUP+

Overview

The MAX3222EEUP+ is a dual RS-232 transceiver manufactured by Analog Devices/Maxim Integrated, housed in a 20-pin TSSOP package. It operates on a single +3.0V to +5.5V supply and features an internal dual charge pump requiring only four 0.1µF capacitors. The device provides two drivers and two receivers with full-duplex communication capabilities at data rates up to 250kbps. It includes a shutdown mode that reduces supply current to 1µA while keeping receivers active for external monitoring. Enhanced ESD protection safeguards all transmitter outputs and receiver inputs against ±15kV human body model discharges.

Feature Summary

• Integrated dual charge pump enables true RS-232 performance from low-voltage supplies using minimal external capacitance.
• Shutdown mode significantly reduces power consumption while maintaining receiver activity for system monitoring.
• Robust electrostatic discharge protection ensures reliability during handling and operation without latch-up risks.

Applications

• Battery-powered portable equipment
• Cell phone and smartphone data cables
• Notebook and subnotebook computers

Procurement Notes

Verify the component authenticity through official manufacturer channels or authorized distributors. Confirm the specific suffix matches the required temperature range and packaging format. Ensure compliance with RoHS standards as indicated by the plus sign in the part number. Check for obsolescence status before finalizing procurement plans.

Selection Notes

Select this component when designing systems requiring low-power RS-232 interfaces with high ESD tolerance. It serves as a direct pin-compatible replacement for legacy MAX242 devices. Consider the shutdown feature for battery-operated applications where standby power is critical. Verify capacitor values meet the minimum requirements for stable charge pump operation.

Part Context

This device belongs to the MAX3222E family of low-power RS-232 transceivers. It shares functional compatibility with industry-standard parts like the MAX242 but offers improved power efficiency and ESD robustness. The EE suffix denotes the extended industrial temperature range, distinguishing it from commercial grade variants.

Replacement Considerations

MAX3222ECTP+ (TQFN package)

FAQ

How does the shutdown mode affect receiver functionality?

In shutdown mode, the supply current drops to 1µA, but the receivers remain active, allowing the device to monitor external signals while minimizing power consumption.

What is the maximum data rate supported by the MAX3222EEUP+?

The device guarantees operation at data rates up to 250kbps while maintaining RS-232 compliant output levels under worst-case load conditions.