MAX3224EUP

Overview

The MAX3224EUP is a dual-line RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, designed for full-duplex communication. It operates within a supply voltage range of 3.0 V to 5.5 V and supports data rates up to 1 Mbps. The device integrates two drivers and two receivers, featuring an operating supply current of 1 mA. It includes AutoShutdown Plus technology to minimize power consumption during inactivity. The component provides ±15 kV ESD protection on all lines and functions reliably across an industrial temperature range from -40°C to +85°C. It is housed in a TSSOP-20 package.

Feature Summary

• AutoShutdown Plus technology automatically reduces supply current when the cable is disconnected or inputs remain inactive for extended periods.
• Integrated ±15 kV ESD protection on all RS-232 signal lines ensures robustness against electrostatic discharge events.
• Full-duplex operation with independent drivers and receivers supports standard RS-232 protocols including EIA/TIA-232 and V.28/V.24.

Applications

• Industrial control systems requiring reliable serial communication interfaces
• Portable equipment utilizing battery power where low standby current is critical
• Embedded systems connecting microcontrollers to PC serial ports

Procurement Notes

Verify the specific suffix 'UP' corresponds to the TSSOP-20 package configuration as documented in official datasheets. Confirm RoHS compliance status through manufacturer certification documents prior to integration. Ensure the sourcing channel provides traceability to Analog Devices or Maxim Integrated to guarantee component authenticity and performance consistency.

Selection Notes

Select this component when designing circuits that require high-speed RS-232 transmission at 1 Mbps alongside significant power savings. The integrated ESD protection eliminates the need for external protection devices, simplifying board layout. Verify that the system's UART timing requirements align with the specified propagation delay characteristics for reliable data integrity.

Part Context

This part belongs to the MAX322x/MAX324x family of 3V-powered RS-232 transceivers. It shares core architectural features with variants like the MAX3224EETP+, differing primarily in packaging and pinout configurations. The series is characterized by its ability to operate efficiently on single supplies while maintaining compatibility with legacy RS-232 standards.

Replacement Considerations

The MAX3224EETP+ serves as a functional alternative within the same family, offering identical electrical specifications but utilizing a TQFN-EP-20 package instead of TSSOP-20. Designers must evaluate footprint compatibility and thermal management requirements when substituting between these package types.

FAQ

How does the AutoShutdown Plus feature function?

The feature automatically places the device into a low-power shutdown mode when the RS-232 cable is disconnected or when the transmitter inputs remain inactive for more than 30 seconds. The device wakes up upon sensing a valid transition at any input.

What is the maximum data rate supported by the MAX3224EUP?

The device supports data rates up to 1 Mbps, allowing for faster communication compared to traditional RS-232 transceivers limited to lower speeds.

Is external ESD protection required for this component?

No, the MAX3224EUP includes built-in ±15 kV ESD protection on all RS-232 lines, eliminating the need for additional external protection components.