MAX3386ECUP

Overview

The MAX3386ECUP is a 3V-powered EIA/TIA-232 and V.28/V.24 communications interface featuring two receivers and three transmitters. It operates from a +3.0V to +5.5V supply with a dual charge pump requiring only four small capacitors. The device supports data rates up to 250kbps while maintaining RS-232 compliant output levels. All RS-232 inputs and outputs are protected against electrostatic discharge (ESD) to ±25kV using the IEC 1000-4-2 Air-Gap Discharge method, ±8kV via Contact Discharge, and ±15kV using the Human Body Model. A unique VL pin allows interoperability in mixed-logic voltage systems by programming both input and output logic levels. The component is available in a space-saving TSSOP package.

Feature Summary

• Unique VL pin enables compatibility with mixed-voltage systems
• Enhanced ESD protection on Rx inputs and Tx outputs
• Low 300µA supply current
• Guaranteed 250kbps data rate
• 1µA low-power shutdown mode

Applications

• Subnotebook/Palmtop Computers
• PDAs and PDA Cradles
• Cell Phone Data Cables
• Battery-Powered Equipment
• Hand-Held Equipment

Procurement Notes

Verify the specific ordering suffix 'C' confirms the commercial temperature range of 0°C to +70°C. Confirm the package type matches the required TSSOP footprint for your PCB layout. Ensure the design accounts for the necessary external capacitors for the internal charge pump operation as specified in the datasheet.

Selection Notes

Select this part when interfacing between 3V logic systems and standard RS-232 ports. The separate VL pin is critical for connecting to devices with logic levels lower than VCC, such as 1.8V baseband processors in mobile phones. Ensure the application requires three transmitter channels, particularly if a ring indicator signal is needed alongside full-duplex communication.

Part Context

This component belongs to the MAX3386E family of RS-232 transceivers designed for portable electronics. The 'C' suffix denotes the commercial operating temperature range, distinguishing it from the 'E' suffix variant which supports extended industrial temperatures. Both variants share identical electrical characteristics and pin configurations within the TSSOP package.

Replacement Considerations

The MAX3386EEUP serves as a direct functional replacement with an extended temperature range (-40°C to +85°C). Verify that the thermal requirements of the target application align with the commercial grade specifications before substituting.