MAX3221CUE+T

Overview

The MAX3221CUE+T is a single-channel RS-232 transceiver in a 16-pin TSSOP package. It operates from a +3.0V to +5.5V supply and achieves 1µA supply current via AutoShutdown™ when no valid signal is detected on receiver inputs for 30µs. The device includes an integrated dual charge pump requiring only 0.1µF capacitors at 3.3V, eliminating the need for ±12V supplies. It supports data rates up to 235kbps with typical propagation delays of 0.3µs. The component provides full-duplex communication with one driver and one receiver.

Feature Summary

• AutoShutdown technology reduces power consumption by disabling internal power supplies and drivers when idle.
• Integrated dual charge pump generates required RS-232 voltages from a single low-voltage supply.
• Provides direct interface compatibility with TTL and CMOS logic families.

Applications

• Battery-powered equipment
• Hand-held devices
• Portable diagnostics equipment

Procurement Notes

Verify the specific suffix 'C' indicates the commercial temperature range (0°C to +70°C) and 'UE' denotes the TSSOP-16 package. Confirm the '+' suffix ensures compliance with RoHS standards as per manufacturer documentation. Cross-reference the ordering information table in the official datasheet to ensure the selected variant matches the required environmental and packaging specifications for the target application.

Selection Notes

Select this component for applications requiring minimal standby current and simplified power management. The AutoShutdown feature is critical for battery-operated systems where cable disconnection must trigger power-down. Ensure external capacitor values match the VCC voltage requirements specified in the datasheet tables to maintain proper charge pump operation and signal integrity.

Part Context

This part belongs to the MAX3221/MAX3223/MAX3243 family of 3V to 5.5V RS-232 transceivers. While the MAX3223 offers two channels and the MAX3243 provides three drivers and five receivers, the MAX3221 is specifically configured as a single-driver, single-receiver solution. All variants share the same core AutoShutdown functionality and charge pump architecture within their respective pin counts.

Replacement Considerations

Direct functional replacements within the same family include the MAX3221CAE+T (SSOP-16 package) or the MAX3221EAE+T (Extended temperature range). For multi-channel needs, the MAX3223 series may be considered if pinout compatibility allows.