MAX221EUE

Overview

The MAX221EUE+ is a single RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, designed for +5V operation. It features integrated charge pumps that generate the required positive and negative voltages from a single supply, eliminating the need for external components. The device supports data rates up to 250 kb/s and includes an auto-shutdown feature to minimize power consumption during idle periods. It operates within a temperature range of -40°C to +85°C and is housed in a 16-pin TSSOP package.

Feature Summary

• Integrated charge pump circuitry generates internal positive and negative supply rails from a single +5V source, removing the requirement for external dual-voltage supplies or boost converters.

Applications

• Industrial control systems requiring reliable serial communication
• Portable battery-powered equipment utilizing single-supply architectures
• Data acquisition modules with RS-232 interface requirements

Procurement Notes

Verify the specific suffix against official manufacturer documentation to confirm pinout compatibility and electrical specifications. Ensure the component meets the required environmental operating conditions for the intended application environment before integration into the design.

Selection Notes

Select this component when a single +5V supply constraint exists alongside the need for RS-232 signaling. The integrated charge pump simplifies board layout compared to discrete solutions. Verify that the 250 kb/s data rate aligns with system timing requirements.

Part Context

This part belongs to the Maxim Integrated MAX221 family of single-supply RS-232 transceivers. It serves as a compact alternative to traditional dual-supply drivers, offering reduced component count and simplified power management for low-speed serial communication interfaces.

Replacement Considerations

Check for direct functional equivalents such as the MAX220 or MAX222 if different channel counts are acceptable. Verify pin-to-pin compatibility with other single-supply RS-232 transceivers from the same manufacturer series before substitution.