MAX239EWG

Overview

The MAX239EWG is a +5V-powered, multichannel RS-232 transceiver from the MAX220–MAX249 family. It integrates three drivers and five receivers in a single package. The device operates on a single +5V supply by utilizing internal charge-pump circuitry to generate the required ±10V levels for RS-232 signaling. It supports data rates up to 120 kbps with full-duplex communication capability. The component is housed in a 24-pin Wide SOIC package and is rated for an industrial operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates dual charge-pump DC-DC voltage converters to eliminate the need for external bipolar power supplies.
• Enables single-supply operation using only a +5V source while generating necessary RS-232 voltage levels internally.
• Provides independent enable control inputs for flexible management of transmitter and receiver states.

Applications

• Interface translation between TTL/CMOS logic and RS-232 serial ports
• Multidrop RS-232 network communications
• Portable diagnostic equipment requiring low-power serial connectivity

Procurement Notes

Verify the specific suffix 'E' confirms the extended temperature rating (-40°C to +85°C) against the manufacturer's ordering guide. Confirm the package designation matches the 24-pin Wide SOIC footprint. Ensure the component meets RoHS compliance requirements if applicable to the target assembly process.

Selection Notes

Select this part when a design requires multiple transmit and receive channels within a single IC. It is suitable for systems constrained by board space where external voltage inverters are undesirable. Verify that the total channel count (three drivers, five receivers) aligns with the system interface requirements.

Part Context

This component belongs to the MAX220–MAX249 family of line drivers and receivers designed for EIA/TIA-232E and V.28/V.24 interfaces. The family offers various configurations of driver and receiver counts across different package types to accommodate diverse interface needs without requiring external high-voltage generation components.

Replacement Considerations

Direct substitutes include the HIN239CBZ. Verify pinout compatibility and electrical specifications before implementation.