MAX239EWG+T

Overview

The MAX239EWG+T is a +5V-powered, multichannel RS-232 driver and receiver integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 4.5V to 5.5V and supports data rates up to 120 kbps. The device features three drivers and five receivers with full-duplex communication capability. It utilizes an internal charge pump to generate the required ±10V levels from a single +5V supply, eliminating the need for external bipolar power sources. The component is housed in a 24-pin SOIC package and is rated for operation across a temperature range of 0°C to +70°C.

Feature Summary

• Integrated charge pump circuitry eliminates the requirement for external components or bipolar ±12V supplies.
• Enables single-supply operation using only a +5V source for standard RS-232 interface generation.
• Provides flexible control inputs allowing independent shutdown and enable states for transmitters and receivers.

Applications

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

Procurement Notes

Verify that the ordering suffix matches the specific package type and temperature grade required for the design. Confirm RoHS compliance status through official manufacturer documentation before procurement. Ensure the supplier provides valid traceability records for the Analog Devices / Maxim Integrated brand.

Selection Notes

Select this component when a system requires multiple RS-232 channels driven by a single +5V supply without external charge pump capacitors. Compare against other family members like the MAX238 or MAX242 based on the specific count of available drivers and receivers needed for the application architecture.

Part Context

This part belongs to the MAX220–MAX249 family of line drivers and receivers designed for EIA/TIA-232E and V.28/V.24 communications interfaces. The family addresses applications where generating high-voltage RS-232 signals from low-voltage logic is necessary without complex external circuitry.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the verified source material.