MAX3241EAI

Overview

The MAX3241EAI is a true RS-232 transceiver operating from a single 3.0V to 5.5V supply. It features three drivers and five receivers, utilizing a dual charge pump with four 0.1µF capacitors. The device guarantees data rates up to 120kbps, typically reaching 235kbps. It includes two always-active complementary receiver outputs (R1OUTB, R2OUTB) for monitoring without forward biasing protection diodes. Shutdown mode reduces supply current to less than 1µA while keeping receivers active.

Feature Summary

• Integrated dual charge pump eliminates the need for bipolar ±12V supplies
• Always-on complementary receiver outputs enable external device monitoring during shutdown
• Low-power shutdown mode extends battery life in portable applications

Applications

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

Procurement Notes

Verify the specific suffix 'E' indicates an extended temperature range of -40°C to +85°C. Confirm the package code 'AI' corresponds to the SSOP-28 configuration. Ensure the component meets RoHS standards as indicated by the '+' designation. Cross-reference the manufacturer's ordering information to validate availability and lead times before finalizing procurement plans.

Selection Notes

Select this component when interfacing TTL/CMOS logic with RS-232 ports requiring multiple receivers. The MAX3241 is suitable for systems needing mouse driveability or ring indicator detection due to its extra outputs. Compare against the MAX3237 if higher MegaBaud speeds are required, or the MAX3232 if fewer channels suffice. Ensure capacitor values match the supply voltage requirements specified in the datasheet.

Part Context

This part belongs to the MAX32xx family of low-power RS-232 transceivers. It shares architectural similarities with the MAX3222 and MAX3232 but offers increased channel counts. The E-series designation denotes industrial temperature performance compared to the C-series commercial grade. It serves as a direct replacement for legacy MAX232-based designs in modern low-voltage systems.

Replacement Considerations

The MAX3241CAI+ is the commercial temperature variant (-40°C to +85°C vs 0°C to +70°C). The MAX3241EUI+ provides the same electrical characteristics in a TSSOP-28 package instead of SSOP.