MAX3243EEAI+TG071

Overview

The MAX3243EEAI+TG071 is a +3.0V to +5.5V RS-232 transceiver featuring three drivers and five receivers in a 28-pin SSOP package. It utilizes AutoShutdown technology to achieve 1µA supply current when no valid signal is detected on receiver inputs for 30µs. The device operates at data rates up to 235kbps with typical propagation delays of 0.3µs. It includes an always-active complementary receiver output (R2OUTB) for external monitoring during shutdown. The IC integrates dual charge pumps requiring only 0.1µF capacitors for 3.3V operation.

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 circuitry generates required voltage levels from a single low-voltage supply, eliminating the need for external ±12V sources.
• Complementary receiver output remains active during shutdown states to monitor peripheral activity without forward-biasing connected devices.

Applications

• Battery-powered equipment
• Hand-held devices
• 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 that the component meets all necessary regulatory standards for the intended deployment environment before finalizing procurement decisions.

Selection Notes

Select this component for applications requiring low-power standby modes and single-supply operation. The inclusion of an always-active receiver output makes it suitable for systems needing continuous line monitoring while the main interface is powered down. Ensure the design accommodates the required external capacitor values for the charge pump circuitry based on the operating voltage.

Part Context

This part belongs to the MAX3221/MAX3223/MAX3243 family of RS-232 transceivers. It shares core features such as AutoShutdown and single-supply operation with other members like the MAX3221 and MAX3223. The primary distinction lies in the number of drivers and receivers provided, with this model offering three drivers and five receivers for more complex serial communication interfaces.

Replacement Considerations

Direct functional replacements within the same family include the MAX3243EAI and MAX3243CWI. Verify pinout compatibility and electrical specifications before substitution. Alternative packages such as TSSOP or Wide SO may require layout adjustments despite maintaining identical logical functionality.