MAX3243EAI+T

Overview

The MAX3243EAI+T is a multichannel RS-232 line driver and receiver manufactured by Analog Devices Inc. (Maxim Integrated). It operates from a single +3.0V to +5.5V supply and features three transmitters and five receivers in a 28-pin SSOP package. The device incorporates AutoShutdown technology, reducing supply current to 1µA when no valid signal is detected on the receiver inputs for 30µs. It supports data rates up to 235kbps with typical operation at 120kbps under worst-case loads. The integrated dual charge pump eliminates the need for external ±12V supplies.

Feature Summary

• AutoShutdown functionality reduces power consumption by disabling the onboard power supply and drivers when valid RS-232 signals are absent.
• Integrated dual charge pump generates required internal voltages using only four small external capacitors.
• Includes an always-active complementary receiver output (R2OUTB) for monitoring ring indicator activity during shutdown states.

Applications

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

Procurement Notes

Verify that the ordering suffix 'T' corresponds to tape-and-reel packaging as specified in the manufacturer's documentation. Confirm the 'E' designation indicates the extended temperature range of -40°C to +85°C. Ensure the '+' suffix aligns with RoHS compliance requirements for the specific procurement region.

Selection Notes

Select this component when interfacing CMOS logic to RS-232 ports in low-voltage systems requiring minimal standby power. The MAX3243 is suitable for applications needing multiple transmitter and receiver channels within a single package. Consider the AutoShutdown feature for battery-operated designs where cable disconnection detection is necessary to conserve energy.

Part Context

This part belongs to the MAX3221/MAX3223/MAX3243 family of +3V to +5.5V RS-232 transceivers. While the MAX3221 offers one driver/receiver and the MAX3223 provides two, the MAX3243 expands capacity to three drivers and five receivers. All variants share the same core AutoShutdown architecture and charge-pump technology.

Replacement Considerations

Publicly confirmed substitute part numbers include V62-06624-01XE and V62-06624-01YE, which are enhanced product versions available from Texas Instruments.