54F253/B2A

Overview

The 54F253/B2A is a military-grade dual 1-of-4 data selector/multiplexer manufactured by Rochester Electronics. It contains two independent multiplexers, each capable of selecting one of four data inputs based on binary address lines. The device features three-state outputs, allowing multiple devices to share bus systems without interference. Designed for high-reliability applications, it meets MIL-PRF-38535 Class Q or V standards, ensuring performance in extreme environmental conditions.

Feature Summary

• Dual independent 1-of-4 multiplexing sections with separate strobe controls
• Three-state outputs for efficient bus-organized system interfacing
• Full binary decoding via integrated inverters and drivers
• Qualified for Class Q Military and Class V Space Level environments

Applications

• Military avionics signal routing
• Spacecraft data bus management
• High-reliability industrial control systems
• Defense communication equipment

Procurement Notes

Verify the specific suffix (B2A) against the official Rochester Electronics datasheet to confirm package type and temperature range. Ensure the component matches MIL-PRF-38535 qualification requirements for your application. Confirm supply status as these are often lifecycle-managed parts. Request test reports to guarantee compliance with original manufacturer specifications.

Selection Notes

Select this component when dual multiplexing with three-state outputs is required in harsh environments. It serves as a direct replacement for legacy SN54F253 designs needing extended reliability. Consider the package constraints and voltage levels compatible with your system logic family. Verify that the strobe input polarity matches your control logic design.

Part Context

This part belongs to the SN54F series of fast logic multiplexers. Rochester Electronics provides lifecycle support for discontinued military-grade components. The B2A suffix typically denotes a specific package variant and processing level. These devices are critical for maintaining functionality in systems where standard commercial parts are insufficient due to environmental stress.

Replacement Considerations

Direct substitutes include the original SN54F253 from Texas Instruments if available. Other qualified manufacturers may offer equivalent MIL-PRF-38535 versions. Ensure pin compatibility and electrical characteristics match before substitution. Verify that any alternative meets the same Class Q or V certification standards.