MAX3241CWI+

Overview

The MAX3241CWI+ 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 up to 235kbps typically. It provides low-power shutdown functionality with supply current below 1µA and includes always-active complementary receiver outputs for monitoring.

Feature Summary

• Integrated dual charge pump eliminates the need for bipolar ±12V supplies
• Always-on complementary receiver outputs enable external device monitoring without forward biasing protection diodes
• Low-power shutdown mode reduces supply current to less than 1µA while maintaining receiver activity

Applications

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

Procurement Notes

Verify the specific suffix 'C' indicates the commercial temperature range (0°C to +70°C) and 'W' denotes the wide SOIC package. Confirm the '+' suffix ensures lead-free compliance. Cross-reference the manufacturer's ordering guide to ensure compatibility with your board layout and environmental requirements before finalizing procurement.

Selection Notes

Select this component when interfacing TTL/CMOS logic with RS-232 standards using a single voltage supply. It is suitable for applications requiring multiple receiver lines and driver outputs within a compact footprint. Ensure the design accommodates the required four external charge-pump capacitors and verify that the 235kbps typical data rate meets system timing constraints.

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 transmitter stages to maintain true RS-232 performance across the full operating voltage range.

Replacement Considerations

The MAX3241CAI+ serves as a pin-compatible alternative in the SSOP package. For broader temperature ranges, the MAX3241E series variants are available. Verify that any substitute maintains the same driver/receiver count and package dimensions to ensure mechanical fit.