MAX3221EEAE+TG071

Overview

The MAX3221EEAE+TG071 is a single-driver, single-receiver RS-232 transceiver from the MAX3221E series. It operates on a +3.0V to +5.5V supply and supports data rates up to 250kbps. The device features an AutoShutdown function that reduces supply current to 1µA when no valid signal is detected. It includes ±15kV ESD protection per IEC 1000-4-2 standards. The component is housed in a 16-pin SSOP package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• AutoShutdown technology enables ultra-low power consumption by entering shutdown mode during cable disconnection or peripheral inactivity.
• Integrated dual charge pump generates true RS-232 voltage levels directly from a single low-voltage supply.
• Enhanced electrostatic discharge protection ensures robustness against high-voltage static events without latchup.

Applications

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

Procurement Notes

Verify the specific ordering suffix 'G071' against official manufacturer documentation to confirm exact packaging and lot traceability details. Confirm availability status as distribution channels may list this part as discontinued or limited stock. Ensure the source document explicitly validates the suffix before procurement planning.

Selection Notes

Select this component for applications requiring minimal pin count and space constraints due to its single driver/receiver configuration. It is suitable for systems needing automatic power management without BIOS modifications. Verify that the required data rate does not exceed 250kbps and that the operating environment falls within the specified industrial temperature range.

Part Context

This part belongs to the MAX3221E/MAX3223E/MAX3243E family of 3V-powered RS-232 transceivers. While the MAX3223E offers two drivers and receivers, and the MAX3243E provides three drivers and five receivers, the MAX3221E specifically provides the smallest footprint for single-channel serial communication needs.

Replacement Considerations

Direct functional substitutes within the same family include the MAX3223E for dual-channel requirements and the MAX3221ECTE+ for TQFN packaging alternatives. Cross-family replacements like the MAX3222E offer similar performance but with different channel counts.

FAQ

How does the AutoShutdown feature reduce power consumption?

The AutoShutdown circuitry monitors receiver inputs. If no valid RS-232 signal levels are detected for 30µs, the internal charge pump and drivers shut off, reducing supply current to 1µA until a valid signal reactivates the device.

What capacitor values are required for operation at 3.3V?

For a +3.3V supply, the datasheet specifies using four 0.1µF capacitors (C1–C4) for the charge pump operation.

Is the INVALID output active during shutdown?

Yes, the INVALID output remains functional in any mode, including shutdown. It goes low when no valid RS-232 signal levels are present on all receiver inputs.