MAX3244EEAI

Overview

The MAX3244EEAI+ is a true RS-232 transceiver from the MAX3244E series, manufactured by Analog Devices (Maxim Integrated). It features three drivers and five receivers with full-duplex communication capability. The device operates on a single +3.0V to +5.5V supply and achieves a typical supply current of 1μA through AutoShutdown Plus technology. It guarantees a data rate of 250kbps and includes ±15kV ESD protection on all I/O pins. The component is housed in a 28-pin SSOP package and supports an operating temperature range of -40°C to +85°C.

Feature Summary

• AutoShutdown Plus functionality automatically reduces power consumption when the interface is idle or disconnected.
• Integrated dual charge pump generates internal voltage rails for RS-232 signaling without external transformers.
• Robust electrostatic discharge protection ensures reliability in high-interference environments.

Applications

• Notebook, subnotebook, and palmtop computers
• Cellular phones and battery-powered equipment
• Hand-held devices and peripherals

Procurement Notes

Verify the specific suffix 'EEAI+' against official manufacturer documentation to confirm the exact pinout, thermal characteristics, and RoHS compliance status. Ensure the ordering code matches the required industrial temperature grade and package variant before finalizing procurement specifications.

Selection Notes

Select this component for applications requiring multiple receiver inputs alongside standard transmitter outputs. The inclusion of AutoShutdown Plus makes it suitable for battery-operated systems where minimizing quiescent current during idle periods is critical for extending operational life.

Part Context

This part belongs to the MAX3224E/MAX3225E/MAX3226E/MAX3227E/MAX3244E/MAX3245E family of low-power RS-232 transceivers. While sharing core technologies like AutoShutdown Plus and ESD protection, variants within the family differ in driver/receiver counts and maximum guaranteed data rates.

Replacement Considerations

The MAX3245E offers identical pinouts and features but guarantees a higher data rate of 1Mbps compared to the 250kbps limit of the MAX3244E.

FAQ

How does the AutoShutdown Plus feature function?

It monitors receiver and transmitter inputs; if no valid transitions occur for over 30 seconds, the device shuts down to 1μA current and wakes upon detecting activity.

What is the purpose of the INVALID output pin?

The INVALID pin indicates whether valid RS-232 voltage levels are present on the receiver inputs, remaining active regardless of the shutdown state.