MAX3223CUP+T

Overview

The MAX3223CUP+T is a dual-driver, dual-receiver RS-232 transceiver from Analog Devices/Maxim Integrated. It operates on a single +3.0V to +5.5V supply and features AutoShutdown technology that reduces supply current to 1µA when no valid signal is detected. The device guarantees a 120kbps data rate with worst-case loads of 3kΩ in parallel with 1000pF, typically supporting up to 235kbps. It utilizes internal charge pumps requiring only 0.1µF capacitors for 3.3V operation. The component is housed in a 20-pin TSSOP package and supports an operating temperature range of 0°C to +70°C.

Feature Summary

• AutoShutdown functionality automatically disables the onboard power supply and drivers upon detecting invalid receiver input levels, significantly reducing power consumption.
• Integrated dual charge-pump circuitry generates required ±5.5V voltages from a single low-voltage supply, eliminating the need for external ±12V sources.
• Transmitters provide true RS-232 performance with guaranteed output voltage swings compatible with standard PC-to-PC communication software.

Applications

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

Procurement Notes

Verify the specific suffix 'CUP+T' against official manufacturer documentation to confirm tape-and-reel packaging and RoHS compliance status. Confirm the commercial temperature grade (0°C to +70°C) matches system requirements. Ensure the ordering code aligns with the 20-pin TSSOP footprint. Cross-reference the datasheet revision date to validate electrical characteristics.

Selection Notes

Select this component for applications requiring low-power standby modes via AutoShutdown. Verify compatibility with 3.3V or 5V logic families. Ensure the 120kbps guaranteed data rate meets interface speed requirements. Check thermal dissipation limits for the TSSOP package under maximum load conditions.

Part Context

This part belongs to the MAX3221/MAX3223/MAX3243 family of 3V-powered RS-232 transceivers. The MAX3223 variant specifically provides two drivers and two receivers, distinguishing it from the single-channel MAX3221 and the multi-channel MAX3243. All members share the same core AutoShutdown architecture and charge-pump design.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult the manufacturer's selector guide for alternative packages or pin-compatible variants within the MAX322x series.