MAX3243ECUI+

Overview

The MAX3243ECUI+ is a full-duplex RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It integrates three drivers and five receivers within a 28-pin TSSOP package, operating from a single +3.0V to +5.5V supply. The device supports data rates up to 235kbps with typical propagation delays of 0.3µs. It features AutoShutdown technology, reducing supply current to 1µA when no valid signal is detected for 30µs. The component operates within a commercial temperature range of 0°C to +70°C.

Feature Summary

• AutoShutdown functionality reduces power consumption by disabling the onboard power supply and drivers when receiver inputs lack valid signal levels.
• Integrated dual charge-pump circuitry generates required voltage levels from a single low-voltage supply, eliminating the need for external ±12V sources.
• Includes an always-active complementary receiver output (R2OUTB) that remains functional during shutdown to monitor external devices without forward-biasing connected logic.

Applications

• Battery-powered equipment requiring extended standby life
• Hand-held and portable diagnostic instruments
• Computer peripherals utilizing serial communication interfaces

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official selector guide to confirm the exact package type and temperature rating. Ensure the procurement channel provides documentation confirming compliance with the RoHS directive as indicated in the datasheet. Cross-reference the part number with the authorized distributor list to guarantee authenticity and traceability.

Selection Notes

Select this component for designs requiring multi-channel RS-232 connectivity with minimal quiescent current. The inclusion of an always-active receiver makes it suitable for systems where ring indicator monitoring is necessary even when the main interface is powered down. Verify that the application load capacitance does not exceed the limits specified for the guaranteed data rate.

Part Context

This device belongs to the MAX3221/MAX3223/MAX3243 family of low-voltage RS-232 transceivers. While sharing core architecture with the MAX3221 and MAX3223, the MAX3243 variant specifically provides three drivers and five receivers. The 'E' designation indicates the commercial temperature grade, and 'U' specifies the thin-shrink small-outline package.

Replacement Considerations

Publicly confirmed substitute part numbers include V62/06624-01XE and V62/06624-01YE, which are identified as enhanced product versions with similar specifications.