MAX239ENG+

Overview

The MAX239ENG+ is a dual-channel RS-232 driver and receiver integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +5V power supply, utilizing internal charge-pump circuitry to generate the required ±10V levels for EIA/TIA-232E communication interfaces without external bipolar supplies. The device features TTL/CMOS-compatible inputs and outputs, ensuring compatibility with standard logic families. It includes dedicated enable control pins for managing transmitter and receiver states independently. The component is housed in a 16-pin Narrow SOIC package and supports an industrial operating temperature range of -40°C to +85°C.

Feature Summary

• Integrated dual charge-pump DC-DC voltage converters eliminate the need for external bipolar power supplies
• Independent enable control inputs allow selective activation of transmitters and receivers
• TTL and CMOS compatible input and output logic levels ensure broad system integration

Applications

• Interface translation between TTL/CMOS logic and RS-232 serial ports
• Multidrop RS-232 network connections
• Portable diagnostics equipment requiring low-power serial communication

Procurement Notes

Verify that the ordering suffix 'ENG+' corresponds to the specific package type (Narrow SOIC) and extended temperature range (-40°C to +85°C). Confirm compliance with lead-free manufacturing standards as indicated by the '+' designation. Ensure the source documentation explicitly lists this exact part number variant to avoid confusion with similar models in the MAX220–MAX249 family.

Selection Notes

Select the MAX239ENG+ when a dual-channel RS-232 interface is required within space-constrained designs. It is suitable for applications needing independent control over transmit and receive paths via dedicated enable pins. Consider this component for systems operating exclusively on a +5V supply where generating negative voltages internally is preferred.

Part Context

This component belongs to the MAX220–MAX249 family of +5V-powered, multichannel RS-232 drivers and receivers. The family offers various channel counts and package options to suit different interface requirements. The MAX239 specifically provides two drivers and two receivers, distinguishing it from single or quad-channel variants within the same product line.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.