54ACT157WRQMLV

Overview

The 54ACT157WRQMLV is a quad 2-line to 1-line data selector/multiplexer manufactured by National Semiconductor. It belongs to the 54ACT series and is packaged in a 16-lead Ceramic Flat Pack (CFP). This component functions as a high-speed logic switch, selecting one of two data inputs for each of four independent channels based on select signals. The device is designed for military or aerospace applications, indicated by the QMLV qualification suffix, ensuring reliability under harsh environmental conditions.

Feature Summary

• Provides four independent 2-to-1 multiplexing channels
• Utilizes ACT series technology for high-speed operation
• Constructed in a hermetic ceramic flat pack package

Applications

• Military signal routing systems
• Aerospace data bus switching
• High-reliability industrial control interfaces

Procurement Notes

Verify the specific QMLV qualification status with the manufacturer or authorized distributor to ensure compliance with required military standards. Confirm that the 16-lead CFP package dimensions match the target board layout. Request full traceability documentation and test reports associated with the lot number to validate authenticity and performance history for critical deployment scenarios.

Selection Notes

Select this component when a hermetically sealed, radiation-hardened multiplexer is required for mission-critical environments. The ACT series offers a balance of speed and power consumption suitable for complex logic systems. Ensure the design accommodates the specific thermal and mechanical constraints of the ceramic flat pack format compared to standard plastic packages.

Part Context

This part is part of the broader 54ACT family of logic devices, which are known for compatibility with TTL levels while offering improved speed over LS variants. The 54ACT157 specifically addresses the need for multiple parallel data selection paths. The WRQMLV designation signifies a specialized manufacturing process intended for defense and space applications requiring enhanced durability.

Replacement Considerations

Direct replacements must maintain the 54ACT logic family characteristics and the 16-CFP package form factor. Verify that any substitute part holds equivalent QMLV certification if military compliance is mandatory. Cross-reference pinouts and electrical specifications to ensure functional equivalence without redesigning the host circuitry.