MAX3311ECUB+

Overview

The MAX3311ECUB+ is a low-power, single-channel RS-232 transceiver designed for +5V operation. It features one transmitter and one receiver with EIA/TIA-232 compatibility. The device incorporates a proprietary low-dropout output stage and a single inverting charge pump requiring only three 0.1µF capacitors. It supports data rates up to 460kbps while maintaining compliant output levels. Key electrical parameters include a supply voltage range of 4.5V to 5.5V, typical supply current of 250µA, and shutdown current of 1µA. I/O pins are protected against ±15kV electrostatic discharge using the Human Body Model.

Feature Summary

• Integrated ±15kV Human Body Model ESD protection on all RS-232-compatible input and output pins
• Ultra-low power consumption with a 1µA shutdown mode that disables the charge pump and transmitter
• Receiver remains active during shutdown mode to detect incoming signals without full system power
• Single charge-pump design minimizes external component count by requiring only three small capacitors

Applications

• Portable digital cameras and imaging devices
• Personal Digital Assistants (PDAs) and handheld terminals
• Global Positioning System (GPS) modules
• Point-of-Sale (POS) systems and set-top boxes
• Telecommunications equipment interfaces

Procurement Notes

Verify the specific suffix 'CUB' corresponds to the commercial temperature range of 0°C to +70°C and the 10-pin µMAX package configuration. Confirm RoHS compliance status associated with the '+' designation. Ensure the ordering part number matches the exact pinout and functional requirements for the target application circuit design.

Selection Notes

Select this component when a single-channel RS-232 interface is required within space-constrained designs utilizing the compact µMAX package. It is suitable for applications demanding robust ESD protection and minimal standby power consumption. Consider the MAX3313 variant if an INVALID signal output is needed to indicate cable connection status rather than relying solely on shutdown control logic.

Part Context

This device belongs to the Maxim Integrated MAX3311E/MAX3313E family of low-power RS-232 transceivers. The family shares identical core architecture but differs in feature sets; the MAX3311E focuses on ultra-low power shutdown, while the MAX3313E includes an INVALID output pin. Both variants utilize the same single charge-pump topology and offer identical transmission performance characteristics.

Replacement Considerations

Direct pin-compatible replacements within the same family include the MAX3311EEUB for extended industrial temperature ranges (-40°C to +85°C). For applications requiring an INVALID output signal instead of shutdown control, the MAX3313ECUB serves as the functional equivalent with the additional detection capability.