MAX3243EAI+

Overview

The MAX3243EAI+ 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 an AutoShutdown feature that reduces supply current to 1µA when no valid signal is detected on 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, requiring only four 0.1µF capacitors for 3.3V operation.

Feature Summary

• AutoShutdown technology automatically disables onboard power supplies and drivers to achieve ultra-low standby current when idle.
• Integrated dual charge pump generates required voltage levels from a single low-voltage supply without external high-voltage sources.
• Includes a complementary always-active receiver output for monitoring external devices while other receivers are in high-impedance shutdown state.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature range. Ensure compatibility with system power management requirements regarding the FORCEON and FORCEOFF control pins. Confirm RoHS compliance status through the designated distributor or manufacturer channels before finalizing procurement.

Selection Notes

Select this component for applications requiring low-power RS-232 communication in portable systems. The MAX3243 variant provides sufficient channel count for standard serial ports with additional monitoring capabilities. Consider the 28-pin SSOP package constraints and ensure adequate thermal dissipation within the design envelope.

Part Context

This part belongs to the MAX3221/MAX3223/MAX3243 family of RS-232 transceivers designed for low-voltage operation. The MAX3243 specifically offers three drivers and five receivers, distinguishing it from the lower-channel variants. The 'E' designation indicates an extended temperature range suitable for broader industrial environments compared to commercial grade parts.

Replacement Considerations

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