MAX3241ECUI+T

Overview

The MAX3241ECUI+T 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 worst-case loads of 3kΩ parallel to 1000pF. Supply current is typically 1mA, dropping to less than 1μA in shutdown mode. ESD protection ratings include ±15kV (Human Body Model), ±8kV (IEC Contact Discharge), and ±15kV (IEC Air-Gap Discharge).

Feature Summary

• Integrated dual charge pump generates internal ±5.5V supplies from a single low-voltage source using four small external capacitors.
• Shutdown control pin reduces power consumption significantly while maintaining receiver activity for peripheral monitoring.
• Complementary noninverting receiver outputs remain active during shutdown to detect serial activity without forward biasing connected devices.

Applications

• Notebook and subnotebook computers requiring complete serial ports.
• Battery-powered portable equipment where low standby current is critical.
• Cell-phone data cables and smart phones.

Procurement Notes

Verify the component authenticity through official manufacturer channels or authorized distributors. Confirm that the ordering suffix matches the required temperature range and packaging specifications. Ensure compliance with RoHS directives as indicated by the plus sign in the part number. Cross-reference the datasheet revision date to confirm technical accuracy before integration into production designs.

Selection Notes

Select this component when designing systems requiring three transmit and five receive channels within a compact footprint. It is suitable for applications needing high ESD tolerance on I/O pins. Consider the 28-pin TSSOP package constraints for PCB layout. Verify that the external capacitor values align with the specific supply voltage requirements outlined in the electrical characteristics table.

Part Context

This device belongs to the MAX32xxE family of low-power RS-232 transceivers. It shares architectural similarities with the MAX3222E and MAX3232E but provides expanded channel counts. The ECUI suffix denotes the TSSOP package variant with an industrial temperature range. It serves as a direct functional replacement for legacy MAX242-compatible designs requiring additional receiver lines.

Replacement Considerations

The MAX3241EWI+T offers identical functionality in a 28-SOIC package. The MAX3241EUP+T provides the same electrical performance in a 28-TSSOP format. Verify pin compatibility and thermal dissipation requirements when substituting between these package types.