MAX236EWG

Overview

The MAX236EWG 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 120kbps. The device features four drivers and four receivers with full-duplex communication capabilities. 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 Wide SO package and is rated for operation across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates dual charge-pump DC-DC converters to generate internal ±10V operating voltages from a single +5V supply.
• Provides four independent RS-232 drivers and four receivers for full-duplex serial communications.
• Includes dedicated enable control inputs to selectively activate or deactivate specific transmitter and receiver channels.
• Features low-power shutdown modes that significantly reduce current consumption when the interface is inactive.

Applications

• Interface translation between TTL/CMOS logic and RS-232 standards
• Multidrop RS-232 network connections
• Portable diagnostic equipment requiring single-supply operation

Procurement Notes

Verify the exact ordering suffix against official manufacturer documentation to confirm the specific temperature grade and package variant. Confirm RoHS compliance status as it varies by manufacturing batch and region. Ensure the procurement channel provides valid traceability for this discontinued product line.

Selection Notes

Select this component for designs requiring multiple RS-232 channels without access to negative voltage rails. Verify that the system load on the V+ and V- pins does not exceed the charge pump's current capability. Ensure the selected package width accommodates the PCB layout constraints for the 24-pin Wide SO footprint.

Part Context

This part belongs to the MAX220–MAX249 family of +5V-powered RS-232 transceivers. The family is characterized by its ability to operate without external ±12V supplies, making it suitable for space-constrained and battery-operated applications where board space and power efficiency are critical design factors.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult the manufacturer's obsolescence notices for potential recommended replacements.