MAX238MRG

Overview

The MAX238MRG is a multi-channel RS-232 transceiver manufactured by Analog Devices Inc. under the Maxim Integrated brand, housed in a CDIP-24 package. It operates at a data rate of 120 kb/s with four drivers and three receivers for full-duplex communication. The device requires a single 5 V supply and draws 15 mA of operating current. It features a shutdown mode to reduce power consumption and provides 15 kV ESD protection on I/O and logic pins. The component supports a propagation delay of 10 us and functions within a temperature range of -55°C to +125°C.

Feature Summary

• Integrated charge pump circuitry eliminates the need for external capacitors
• Provides robust 15 kV electrostatic discharge protection on all input and output pins
• Includes a dedicated shutdown pin to minimize power consumption during idle periods
• Supports reliable serial communication over extended industrial temperature ranges

Applications

• Industrial control systems requiring isolated serial communication
• Telecommunications equipment utilizing RS-232 interfaces
• Medical devices needing reliable data transmission in noisy environments
• Test and measurement instruments with multiple serial ports

Procurement Notes

Verify the specific suffix 'MRG' indicates the ceramic DIP package variant when sourcing replacements. Confirm RoHS compliance status as historical batches may differ. Check manufacturer lifecycle notices for obsolescence warnings. Ensure the supplier provides traceability documentation for military or aerospace grade requirements if applicable. Validate that the 5 V supply voltage matches your system design constraints before ordering.

Selection Notes

Select this component when multiple RS-232 channels are needed in a single package. The CDIP-24 form factor suits through-hole mounting for high-reliability applications. Consider the 120 kb/s speed limit for low-bandwidth control signals. Evaluate the 15 kV ESD rating for harsh electromagnetic environments. Compare power consumption against CMOS alternatives if battery operation is critical.