MAX3241EEUI+

Overview

The MAX3241EEUI+ is a true RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 28-pin TSSOP package. It operates on a single +3.0V to +5.5V supply and features three drivers and five receivers for full-duplex communication. The device guarantees data rates up to 250kbps with ±5V output swings. It incorporates an internal dual charge pump requiring only four 0.1µF external capacitors. ESD protection is rated at ±15kV (Human Body Model) and ±8kV (IEC Contact Discharge). Operating temperature ranges from -40°C to +85°C, with shutdown supply current as low as 1µA.

Feature Summary

• Integrated dual charge pump enables true RS-232 performance using only four small 0.1µF external capacitors.
• Enhanced electrostatic discharge protection on all transmitter outputs and receiver inputs withstands ±15kV Human Body Model discharges.
• Shutdown mode reduces power consumption significantly while keeping all receivers active for system monitoring.
• Complementary noninverting receiver outputs remain always active to detect serial activity during shutdown.

Applications

• Notebook and subnotebook computers
• Portable battery-powered equipment
• Cell-phone data cables

Procurement Notes

Verify the specific suffix EEUI against the manufacturer's official documentation to confirm the exact pinout, lead-free status, and operating temperature range. Confirm that the required external capacitors match the datasheet specifications for stable charge-pump operation. Ensure the design accommodates the thermal dissipation limits of the TSSOP-28 package under maximum load conditions.

Selection Notes

Select this component when a complete serial port solution is required for portable systems with limited board space. The inclusion of five receivers allows connection to multiple peripherals such as mice or modems. Verify compatibility with the target logic family voltage levels and ensure the application benefits from the low standby current provided by the shutdown control feature.

Part Context

This part belongs to the MAX32xxE series of low-power RS-232 transceivers designed for 3.0V to 5.5V applications. It serves as a direct replacement for legacy devices like the MAX232 but offers superior ESD protection and lower power consumption. The EEUI designation specifically indicates the industrial temperature grade and the 28-pin thin-shrink small-outline package.

Replacement Considerations

MAX3241ECUI+