MAX3245EETX+TG071

Overview

The MAX3245EETX+TG071 is a fully compliant RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It integrates three drivers and five receivers within a 36-pin TQFN (6x6mm) package with an exposed pad. The device operates on a single +3.0V to +5.5V supply and achieves a guaranteed data rate of 1Mbps using MegaBaud technology. It features AutoShutdown Plus, reducing supply current to 1μA when idle. ESD protection is rated at ±15kV for air discharge and ±8kV for contact discharge.

Feature Summary

• AutoShutdown Plus functionality automatically reduces power consumption by shutting down internal charge pumps during periods of inactivity.
• Integrated dual charge pump generates required voltage levels from a single low-voltage supply without external transformers.
• Enhanced I/O protection ensures signal integrity against electrostatic discharge events common in portable environments.

Applications

• Notebook, Subnotebook, and Palmtop Computers
• Cellular Phones and Battery-Powered Equipment
• Automotive Systems

Procurement Notes

Verify the specific suffix TG071 against official manufacturer documentation to confirm lead-free status and RoHS compliance. Ensure the ordering code matches the exact pinout and thermal requirements for the 36-TQFN footprint before finalizing procurement.

Selection Notes

Select this component for designs requiring high-speed 1Mbps communication over standard RS-232 lines while maintaining strict power constraints. The 36-pin TQFN package is suitable for space-constrained PCB layouts where surface-mount assembly is preferred over through-hole options.

Part Context

This part belongs to the MAX32xxE family of 3V-powered RS-232 transceivers. It shares core architectural features with the MAX3224E, MAX3225E, and MAX3244E, specifically regarding the AutoShutdown Plus circuitry and MegaBaud capabilities, but offers a higher channel count for complex serial interfaces.

Replacement Considerations

Direct functional replacements include the MAX3244E for lower speed applications or other variants within the MAX3224E-MAX3245E series. Verify that any substitute maintains the 36-TQFN package dimensions and compatible electrical characteristics.

FAQ

How does the INVALID output function?

The INVALID output goes low when no valid RS-232 voltage levels are detected on all receiver inputs. This status is independent of the FORCEON and FORCEOFF control states.

What triggers the AutoShutdown Plus mode?

The device enters AutoShutdown Plus mode when it senses no valid signal transition on any receiver or transmitter input for more than 30 seconds, shutting down the charge pumps to save power.

Is the R2OUTB output always active?

Yes, the noninverting complementary receiver output R2OUTB remains active even when the primary receivers are in a high-impedance shutdown state, allowing for ring indicator monitoring.