MAX3223ECUP+

Overview

The MAX3223ECUP+ is a dual-driver, dual-receiver RS-232 transceiver in a 20-pin TSSOP package. It operates from a single +3.0V to +5.5V supply and achieves 1µA supply current via the AutoShutdown feature when no valid signal is detected on receiver inputs for 30µs. The device guarantees a 120kbps data rate with worst-case loads of 3kΩ parallel 1000pF, typically supporting up to 235kbps. Internal dual charge pumps generate ±5.5V rails using only four 0.1µF capacitors at 3.3V operation. Transmitter outputs provide ±5.0V swing, and the part functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• AutoShutdown technology reduces power consumption by disabling internal power supplies and drivers upon detecting invalid receiver input levels.

Applications

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

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm package type and RoHS compliance status. Confirm that the component matches the required industrial temperature range (-40°C to +85°C) and voltage specifications (+3.0V to +5.5V). Ensure compatibility with system logic families before integration.

Selection Notes

Select this component for applications requiring low-power standby modes and minimal external capacitance. The integrated charge pump eliminates the need for dual polarity supplies. Verify that the 20-pin TSSOP footprint aligns with the PCB layout constraints and that the 120kbps guaranteed data rate meets the communication requirements.

Part Context

This component belongs to the MAX3221/MAX3223/MAX3243 family of 3V-powered EIA/TIA-232 communications interfaces. The MAX3223 specifically provides two drivers and two receivers, distinguishing it from the single-channel MAX3221 and the multi-channel MAX3243. All variants share the same core AutoShutdown functionality and charge-pump architecture.

Replacement Considerations

MAX3223EAP+