MAX3245EAI+T

Overview

The MAX3245EAI+T is a true RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It features three drivers and five receivers, supporting full-duplex communication at data rates up to 1Mbps. The device operates on a single +3.0V to +5.5V supply with an operating current of 1µA in shutdown mode. It utilizes AutoShutdown Plus technology for automatic power management and includes a dual charge pump requiring only four small capacitors. The component is housed in a 28-pin SSOP package and supports an industrial temperature range from -40°C to +85°C.

Feature Summary

• AutoShutdown Plus functionality automatically reduces supply current to 1µA when the interface is inactive or disconnected.
• MegaBaud operation guarantees reliable data transmission at speeds up to 1Mbps.
• Integrated dual charge pump generates required voltage levels using minimal external capacitance.
• Dedicated R2OUTB output allows continuous monitoring of receiver activity during system shutdown.

Applications

• Notebook, subnotebook, and palmtop computers
• Cellular phones and handheld equipment
• Battery-powered peripherals and printers

Procurement Notes

Verify that the ordering suffix 'T' corresponds to the specific reel packaging configuration required for your assembly line. Confirm the 'E' designation aligns with the necessary extended temperature range specifications for your deployment environment. Ensure compatibility with RoHS compliance standards before finalizing procurement orders.

Selection Notes

Select this model over the MAX3244 variant when applications require guaranteed data rates up to 1Mbps rather than the 250kbps limit. Consider the MAX3245EAI+T specifically for systems needing five receiver inputs alongside three transmitter outputs. Evaluate the 28-pin SSOP footprint against available board space constraints compared to TSSOP alternatives.

Part Context

This component belongs to the MAX32xx series of low-voltage RS-232 transceivers designed for portable electronics. It shares architectural similarities with the MAX3225 and MAX3227 but provides additional driver and receiver channels. The device represents a transition toward lower power consumption while maintaining standard RS-232 signal integrity.

Replacement Considerations

Public confirmed substitute part numbers include MAX3245ECAI+T and MAX3245EEAI+T. Verify pinout compatibility and electrical characteristics before substituting these variants.

FAQ

How does the AutoShutdown Plus feature determine when to enter low-power mode?

The device enters shutdown mode when no valid signal transitions are detected on any receiver or transmitter input for more than 30 seconds.

What is the function of the R2OUTB pin on the MAX3245?

R2OUTB provides a noninverting complementary receiver output that remains active even when other receivers are in high-impedance shutdown mode.

Can the MAX3245EAI+T drive serial mice directly?

Yes, the device is specifically designed and tested to power serial mice while operating from low-voltage power supplies.