MAX3221ECAE+TG077

Overview

The MAX3221ECAE+TG077 is a single-driver, single-receiver RS-232 transceiver from the MAX3221E family. 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 on all pins. The component is housed in a 16-pin SSOP package and is rated for commercial temperature ranges of 0°C to +70°C.

Feature Summary

• AutoShutdown technology enables ultra-low power consumption by automatically disabling charge pumps and drivers during idle periods.
• Integrated dual charge pump generates required internal voltages using only four small external capacitors.
• Robust electrostatic discharge protection ensures reliability 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 suffix TG077 against manufacturer documentation to confirm packaging details and availability status. Confirm RoHS compliance and lead-free specifications match project requirements. Check for obsolescence notices or product change notifications prior to finalizing procurement plans.

Selection Notes

Select this component for applications requiring minimal pin count and low standby power. Ensure the system design accommodates the required four 0.1µF capacitors for the charge pump. Verify that the 250kbps maximum data rate meets the communication speed requirements of the target interface.

Part Context

This part belongs to the MAX3221E/MAX3223E/MAX3243E family of 3V-powered RS-232 transceivers. While the MAX3221E provides one driver and receiver, other family members offer increased channel counts. All variants share the same core AutoShutdown and ESD protection technologies.

Replacement Considerations

Direct functional replacements within the same package include the MAX3221EEAE+ for extended temperature ranges. Other compatible parts in the series are the MAX3223E and MAX3243E, though they feature additional drivers and receivers.

FAQ

How does the AutoShutdown feature reduce power consumption?

The AutoShutdown circuit monitors receiver inputs. If no valid RS-232 signal levels are detected for 30µs, it disables the onboard charge pump and drivers, reducing supply current to 1µA.

What is the ESD protection rating for this device?

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

What is the minimum number of external capacitors required?

The device requires four small 0.1µF capacitors (C1–C4) for operation from a +3.3V supply to support the dual charge pump voltage converter.