MAX3241CUI

Overview

The MAX3241CUI+ is a true RS-232 transceiver operating from a single 3.0V to 5.5V supply, featuring three drivers and five receivers in a 28-pin TSSOP package. It utilizes an internal dual charge pump requiring only four 0.1µF external capacitors. The device guarantees data rates up to 120kbps with worst-case loads of 3kΩ parallel 1000pF, while typical operation supports 235kbps. It includes shutdown functionality reducing supply current to less than 1µA, and provides complementary receiver outputs (R1OUTB, R2OUTB) that remain active during shutdown for ring indicator detection.

Feature Summary

• Integrated dual charge pump eliminates the need for bipolar ±12V supplies
• Complementary receiver outputs enable monitoring without forward biasing protection diodes
• Shutdown mode reduces power consumption to extend battery life

Applications

• Battery-powered equipment
• Hand-held devices
• Peripherals
• Datacom equipment

Procurement Notes

Verify the specific suffix 'C' indicates the commercial temperature range of 0°C to +70°C. Confirm the 'U' package code corresponds to the 28-pin TSSOP form factor. Ensure the '+' suffix denotes lead-free compliance as per manufacturer standards. Cross-reference the full part number against official distributor catalogs to confirm availability status.

Selection Notes

Select this component when interfacing TTL/CMOS logic with RS-232 ports under single-supply constraints. The MAX3241 is suitable for applications requiring multiple receiver lines or mouse driveability. Consider the thermal resistance characteristics of the TSSOP package for high-density layouts. Verify capacitor values align with the specific VCC voltage to ensure stable charge pump operation.

Part Context

This device belongs to the MAX32xx family of low-power RS-232 transceivers designed for portable electronics. It shares architectural similarities with the MAX3222 and MAX3232 but offers increased I/O capacity with five receivers and three drivers. The C-series designation distinguishes it from the E-series which covers extended industrial temperatures.

Replacement Considerations

The MAX3241EUI+ serves as a direct functional replacement offering the same pinout and electrical characteristics but with an extended temperature range of -40°C to +85°C.