MAX3245EETX+G2X

Overview

The MAX3245EETX+G2X is a fully integrated RS-232 transceiver manufactured by Analog Devices Inc. (Maxim Integrated). It features three drivers and five receivers, supporting data rates up to 1Mbps. The device operates on a single +3.0V to +5.5V supply and incorporates AutoShutdown Plus technology to achieve a typical 1μA supply current during inactivity. It includes dual charge pumps requiring only four small capacitors for voltage generation. The component provides ±15kV ESD protection on all I/O lines and is housed in a 36-pin TQFN package with an exposed pad.

Feature Summary

• AutoShutdown Plus functionality automatically reduces power consumption when the interface is idle or disconnected.
• Integrated dual charge pump generates required RS-232 voltages using minimal external capacitance.
• Enhanced electrostatic discharge protection ensures robustness against high-voltage static events.
• Dedicated noninverting receiver output allows continuous monitoring of line activity during shutdown.

Applications

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

Procurement Notes

Verify the specific ordering suffix G2X against official manufacturer documentation to confirm packaging details and RoHS compliance status. Ensure the procurement channel sources directly from authorized distributors to guarantee component authenticity and traceability.

Selection Notes

Select this component for applications requiring high-speed 1Mbps communication alongside low-power standby modes. The 3-driver/5-receiver configuration supports complex multi-port serial interfaces. Verify that the system design accommodates the 36-pin TQFN footprint and thermal requirements for the exposed pad.

Part Context

This part belongs to the MAX3245E family of RS-232 transceivers designed for space-constrained portable electronics. It shares core electrical characteristics with other variants in the series but is distinguished by its specific pin count and driver/receiver configuration optimized for high-density layouts.

Replacement Considerations

Direct replacements within the same family include the MAX3244E, which offers identical pinout and functionality but guarantees a lower maximum data rate of 250kbps instead of 1Mbps.

FAQ

How does the AutoShutdown Plus feature operate?

The device enters a low-power shutdown mode when no valid signal transitions are detected on any transmitter or receiver input for more than 30 seconds. It automatically wakes up upon sensing a valid transition.

What is the function of the R2OUTB pin?

R2OUTB is a dedicated, always-active noninverting receiver output. It allows the system to monitor receiver activity even when the main receiver outputs are in a high-impedance state due to shutdown.

What level of ESD protection is provided?

All transmitter outputs and receiver inputs are protected to ±15kV using the Human Body Model and IEC 1000-4-2 Air-Gap Discharge, and ±8kV using Contact Discharge.