MAX3241EUI

Overview

The MAX3241EUI+ is a true RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 28-pin TSSOP package. It operates from a single +3.0V to +5.5V supply and features three drivers and five receivers. The device guarantees data rates up to 120kbps at normal operation, with typical performance reaching 235kbps. It incorporates a dual charge pump requiring only four 0.1µF external capacitors. Key electrical parameters include a shutdown supply current of 10µA maximum, receiver propagation delay of 0.3µs, and an operating temperature range of -40°C to +85°C.

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 reduces supply current to less than 1µA while maintaining receiver activity

Applications

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

Procurement Notes

Verify the specific suffix 'E' indicates the extended temperature range (-40°C to +85°C) and 'U' denotes the TSSOP package. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor certificates before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring multiple serial ports within a limited space. The inclusion of extra receiver outputs allows for ring indicator detection even during shutdown states. Ensure adequate decoupling capacitors are placed close to the VCC pin to minimize power-supply noise.

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 provides additional driver and receiver channels. The E-series designation specifically targets industrial environments requiring wider thermal tolerance compared to commercial variants.

Replacement Considerations

The MAX3241CAI+ serves as a direct functional replacement if a commercial temperature range (0°C to +70°C) suffices for the application.