MAX238MRG/883B

Overview

The MAX238MRG/883B is a dual-supply RS-232 transceiver manufactured by Analog Devices Inc. (formerly Maxim Integrated). It features four drivers and four receivers in a 24-CDIP package. The device operates on a single +5V supply with data rates up to 120Kbps. It includes an internal charge pump for generating ±10V from the +5V source, eliminating external capacitors. Key electrical parameters include a 500mV receiver hysteresis and an operating temperature range of -55°C to 125°C. The component supports full RS-232 protocol compliance.

Feature Summary

• Integrates four drivers and four receivers for comprehensive serial communication
• Utilizes internal charge pump to generate required negative voltage without external components
• Provides enhanced noise immunity through specified receiver hysteresis
• Supports extended industrial temperature ranges for harsh environments

Applications

• Industrial control systems requiring robust serial communication
• Military and aerospace equipment needing high-reliability interfaces
• Data acquisition systems with multiple RS-232 ports
• Embedded systems operating in extreme temperature conditions

Procurement Notes

Verify authenticity through authorized distributors or official manufacturer channels due to the component's military-grade designation. Confirm that the specific suffix matches the required qualification standards. Check current availability as this part may be subject to discontinuation notices. Ensure proper handling procedures are followed during installation to maintain signal integrity and device longevity.

Selection Notes

Select this component when four independent RS-232 channels are required within a single package. Consider its extended temperature range for applications exceeding standard commercial limits. Evaluate the 120Kbps speed limit against system requirements. Compare pin compatibility with existing designs if replacing similar Maxim transceivers. Verify power supply constraints align with the single +5V operation capability.

Part Context

This part belongs to the MAX238 family of RS-232 transceivers. It shares functional similarities with the MAX232 but offers double the channel count. The /883B suffix indicates compliance with MIL-PRF-38534 standards for high-reliability applications. It serves as a bridge between microprocessors and serial devices in demanding environments where standard commercial parts may fail.

Replacement Considerations

• MAX238MRG

FAQ

Does the MAX238MRG/883B require external capacitors for the charge pump?

No, the device includes an internal charge pump that eliminates the need for external capacitors typically required in other RS-232 transceivers.

What is the maximum data rate supported by this transceiver?

The MAX238MRG/883B supports data rates up to 120Kbps.