MAX3381EEUP+

Overview

The MAX3381EEUP+ is a dual-transmitter, dual-receiver RS-232 transceiver from Analog Devices/Maxim Integrated. It operates on a +2.35V to +5.5V supply and supports data rates up to 250kbps with a slower slew rate for noise reduction. The device features AutoShutdown Plus technology that reduces supply current to 1µA when idle. All RS-232 and logic pins are protected against ±15kV ESD (HBM/Air-Gap) and ±8kV (Contact). It utilizes a separate VL pin for logic level compatibility down to +1.65V and includes a dual-mode charge pump requiring only four capacitors.

Feature Summary

• AutoShutdown Plus feature automatically enters low-power shutdown mode after 30 seconds of inactivity
• Proprietary low-dropout transmitter output stage maintains RS-232 performance across the entire Li+ battery range
• Separate VL logic supply input enables interoperation in mixed-logic voltage systems down to +1.65V
• Enhanced electrostatic discharge protection on all CMOS and RS-232 inputs and outputs

Applications

• Cell phone data lump cables
• PDA data lump cables
• GPS receivers
• Digital cameras

Procurement Notes

Verify the specific suffix EEUP indicates an industrial temperature range of -40°C to +85°C and TSSOP-20 packaging. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors before procurement. Ensure ordering specifications match the required operational environment and package constraints.

Selection Notes

Select the MAX3381EEUP+ over the MAX3380E variant when applications require reduced electromagnetic interference and lower noise levels due to its slower slew rate. Verify that the system logic voltage requirements align with the VL pin range of +1.65V to +5.5V. Ensure the design accommodates the necessary external capacitors for the dual-mode charge pump operation.

Part Context

This component belongs to the MAX3380E/MAX3381E family of +2.35V to +5.5V RS-232 transceivers. The MAX3381E variant specifically offers a maximum data rate of 250kbps compared to the MAX3380E's 460kbps. Both share identical power management features, ESD protection ratings, and the AutoShutdown Plus functionality within the same TSSOP-20 package footprint.

Replacement Considerations

The MAX3380EEUP+ serves as a direct functional substitute if higher data rates up to 460kbps are acceptable and noise sensitivity is not a primary constraint. Both devices share identical pinouts, package types, and power characteristics.