MAX3223CUP+

Overview

The MAX3223CUP+ is a dual-channel RS-232 transceiver operating from a single +3.0V to +5.5V supply. It features two drivers and two receivers with full-duplex communication capability at data rates up to 120kbps, typically reaching 235kbps. The device incorporates an AutoShutdown feature that reduces supply current to 1µA when no valid signal is detected on receiver inputs for 30µs. It utilizes internal charge pumps requiring only 0.1µF capacitors for 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 signal levels, significantly reducing power consumption during idle periods.
• Integrated dual charge-pump circuitry generates required voltage levels internally, eliminating the need for external ±12V supplies or complex power management components.
• Transmitters provide true RS-232 performance directly from low-voltage logic interfaces, ensuring compatibility with standard PC-to-PC communication protocols.

Applications

• Battery-powered equipment requiring extended operational life
• Hand-held diagnostic tools and portable measurement devices
• Peripheral interface connections for microcontroller systems

Procurement Notes

Verify the specific suffix 'CUP+' against official manufacturer documentation to confirm the exact temperature grade and RoHS compliance status. Ensure the ordering code matches the intended 20-pin TSSOP package variant. Cross-reference the datasheet revision date to validate electrical characteristics before finalizing procurement specifications.

Selection Notes

Select this component for applications necessitating low-power standby modes alongside standard RS-232 connectivity. The integrated charge pump simplifies board layout by minimizing external capacitor requirements. Consider the 0°C to +70°C commercial temperature range suitability for general-purpose industrial or consumer electronics environments.

Part Context

This part belongs to the MAX3221/MAX3223/MAX3243 family of 3V-powered EIA/TIA-232 transceivers. While the MAX3221 offers a single channel and the MAX3243 provides three drivers with additional monitoring outputs, the MAX3223 specifically addresses dual-channel requirements within the same low-power architectural framework.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.