MAX221ECAE

Overview

The MAX221ECAE is a single RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, designed for +5V operation. It features one driver and one receiver with full-duplex communication capability. The device supports data rates up to 250 kb/s and operates within an extended temperature range of -40°C to +85°C. Key electrical specifications include a supply voltage of 5V, a maximum operating current of 10 mA, and a propagation delay of 0.15 µs. It incorporates 15 kV ESD protection on all pins and includes an auto-shutdown feature to minimize power consumption during idle periods. The component is housed in a compact SSOP-16 surface-mount package.

Feature Summary

• Integrated auto-shutdown mode reduces quiescent current significantly when the transmitter is inactive.
• Robust electrostatic discharge protection rated at 15 kV on all signal pins ensures reliability in harsh environments.
• Single-supply +5V operation simplifies power design requirements for standard serial communication interfaces.

Applications

• Portable battery-powered equipment requiring low standby power consumption
• Industrial control systems utilizing RS-232 serial communication protocols
• Embedded systems needing reliable data transmission with high ESD immunity

Procurement Notes

Verify the specific suffix (CAE vs EEAE) against the official datasheet to confirm temperature grade and packaging type. Confirm RoHS compliance status through the manufacturer's current documentation. Check for obsolescence notices or lifecycle changes on the Analog Devices website before finalizing procurement plans.

Selection Notes

Select this component when a single-channel RS-232 interface with integrated charge pump and shutdown functionality is required. Ensure the application environment falls within the specified -40°C to +85°C operating range. Verify that the SSOP-16 footprint matches the PCB layout constraints and that the 250 kb/s data rate meets system timing requirements.

Part Context

This part belongs to the MAX221 series of single RS-232 transceivers from Maxim Integrated, now part of Analog Devices. The series is characterized by its ability to operate from a single +5V supply while generating the necessary positive and negative voltages for RS-232 signaling internally. It serves as a cost-effective solution for basic serial port implementations in space-constrained designs.

Replacement Considerations

The MAX221EEAE+ is a verified equivalent offering identical functional specifications within the same extended industrial temperature range. Both parts utilize the SSOP-16 package and share pin compatibility. Verify that any substitute maintains the 15 kV ESD protection rating and auto-shutdown feature.