MAX3241CWI+T

Overview

The MAX3241CWI+T is a true RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 28-pin Wide SOIC package. It operates from a single +3.0V to +5.5V supply and includes an internal dual charge pump requiring only four 0.1µF external capacitors. The device features three drivers and five receivers, with guaranteed data rates of 120kbps at standard loads and typical operation up to 235kbps. It provides low shutdown supply current of 1µA and supports mouse driveability for serial peripherals.

Feature Summary

• Integrated dual charge pump eliminates the need for bipolar ±12V supplies
• Always-on complementary receiver outputs enable monitoring without forward biasing protection diodes
• Low-power shutdown mode extends battery life in portable applications

Applications

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

Procurement Notes

Verify the component against official datasheets to confirm pinout compatibility and electrical specifications before integration. Ensure that the ordering suffix matches the required temperature range and packaging format. Cross-reference manufacturer documentation to validate RoHS compliance and lead-free status for regulatory adherence.

Selection Notes

Select this component when interfacing TTL/CMOS logic with RS-232 standards using a single voltage supply. It is suitable for designs requiring multiple receiver lines and driver outputs within a compact footprint. Consider its mouse driveability capabilities if connecting serial pointing devices directly to the transmitter outputs.

Part Context

This part belongs to the MAX32xx family of low-power RS-232 transceivers designed for space-constrained applications. It shares architectural similarities with the MAX3222 and MAX3232 but offers increased I/O capacity with five receivers and three drivers. The family utilizes proprietary low-dropout output stages to maintain signal integrity across varying load conditions.

Replacement Considerations

MAX3241CWI (non-RoHS version)

FAQ

What is the function of the R_OUTB pins on the MAX3241?

The R_OUTB pins provide noninverting complementary receiver outputs that remain always active, regardless of the EN or SHDN states. This allows external devices to be monitored even when VCC is removed, preventing forward biasing of protection diodes.

How does the MAX3241 handle shutdown mode?

When the SHDN pin is pulled low, the device enters shutdown mode, reducing supply current to less than 1µA. The charge pumps turn off, and transmitter outputs go high-impedance, while receiver outputs can be controlled via the EN pin.

Can the MAX3241 drive serial mice?

Yes, the MAX3241 is specifically designed to drive serial mice. It has been tested with leading brands like Microsoft and Logitech, meeting their respective current and voltage requirements from low-voltage power supplies.