MAX3243EEUI+T

Overview

The MAX3243EEUI+T is a +3.0V to +5.5V RS-232 transceiver in a 28-pin TSSOP package. It features three drivers and five receivers with full-duplex operation. The device incorporates AutoShutdown technology, reducing supply current to 1µA when no valid signal is detected on receiver inputs for 30µs. It operates within a temperature range of -40°C to +85°C. Electrical specifications include a typical data rate of 235kbps, propagation delay of 0.3µs, and 15kV ESD protection. The integrated dual charge pump eliminates the need for external ±12V supplies.

Feature Summary

• AutoShutdown functionality reduces power consumption by disabling internal power supplies and drivers during periods of inactivity.
• Integrated dual charge pump generates required voltage levels from a single low-voltage supply, removing the need for external negative voltage sources.
• Complementary always-active receiver output allows monitoring of RS-232 activity while other receivers are in high-impedance shutdown states.

Applications

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

Procurement Notes

Verify the specific suffix 'EUI' corresponds to the extended temperature range (-40°C to +85°C) and TSSOP-28 package configuration. Confirm RoHS compliance status via the manufacturer's official documentation or authorized distributor declarations before finalizing procurement orders.

Selection Notes

Select this component for applications requiring low-power standby modes and direct interfacing with 3.3V or 5V logic families. Ensure the design accommodates four external capacitors (0.1µF recommended for 3.3V operation) to support the internal charge pump circuitry effectively.

Part Context

This part belongs to the MAX3243E series of RS-232 transceivers manufactured by Analog Devices / Maxim Integrated. It shares core architectural features with the MAX3221 and MAX3223 but provides a higher channel count suitable for complex serial communication interfaces requiring multiple transmit and receive lines.

Replacement Considerations

MAX3243EAI+T offers identical electrical performance in an SSOP-28 package. MAX3243CUI+ provides the same functionality within the commercial temperature range (0°C to +70°C). Verify pinout compatibility and thermal requirements when substituting these variants.