MAX3243EEUI+

Overview

The MAX3243EEUI+ is a +3.0V to +5.5V RS-232 transceiver featuring AutoShutdown technology that reduces supply current to 1µA when no valid signal is detected on receiver inputs for 30µs. It integrates three drivers and five receivers with an always-active complementary output (R2OUTB) for external monitoring during shutdown. The device utilizes a dual charge pump requiring only 0.1µF capacitors at 3.3V operation, eliminating the need for ±12V supplies. It supports full-duplex communication with guaranteed data rates up to 120kbps under worst-case loads and typical rates of 235kbps. The component operates within a temperature range of -40°C to +85°C and is housed in a 28-pin TSSOP package.

Feature Summary

• AutoShutdown functionality automatically disables onboard power supplies and drivers upon detecting invalid signal levels, significantly reducing power consumption in idle states.
• Integrated dual charge-pump circuitry generates required voltage levels from a single low-voltage supply using minimal external capacitance.
• Complementary R2OUTB receiver remains active during shutdown mode to monitor serial activity without forward-biasing connected peripherals.

Applications

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

Procurement Notes

Verify the specific ordering suffix EEUI against the manufacturer's selector guide to confirm the exact pin configuration and package type. Ensure the selected variant matches the required operating temperature range and RoHS compliance status for the intended deployment environment.

Selection Notes

Select this component for applications requiring low-power standby modes and single-supply operation. Verify that the external capacitor values align with the specific VCC voltage to ensure stable charge-pump performance. Confirm compatibility with the host logic family voltage levels for proper interface signaling.

Part Context

This part belongs to the MAX3221/MAX3223/MAX3243 family of RS-232 transceivers designed by Maxim Integrated. The MAX3243 variant specifically provides three drivers and five receivers, distinguishing it from the lower-channel MAX3221 and MAX3223 models within the same series.

Replacement Considerations

Public confirmed substitute part numbers include V62-06624-01XE and V62-06624-01YE.