100131FCQR

Overview

The National Semiconductor 100131FCQR is a high-speed ECL logic component belonging to the ECL100K family. It integrates three independent D-type flip-flops within a single package, utilizing master-slave triggering for reliable data storage and transfer. The device operates with a supply voltage of -4.5 V and draws a maximum supply current of 149 mA. Key electrical characteristics include a propagation delay of 2.2 ns at nominal supply conditions. It is housed in a ceramic CQFP-24 flatpack package, suitable for surface mount applications requiring robust performance in high-speed digital circuits.

Feature Summary

• Integrates three independent D-type flip-flops for compact multi-channel data handling
• Utilizes master-slave triggering mechanism for stable state transitions
• Constructed using ECL100K technology for high-speed signal processing
• Features ceramic packaging for enhanced thermal and mechanical stability

Applications

• High-speed digital data storage systems
• ECL-based clock distribution networks
• Master-slave register arrays in communication equipment
• Fast parallel-to-serial conversion circuits

Procurement Notes

Verify the specific suffix 'QR' against official National Semiconductor or onsemi datasheets to confirm package variant and temperature range specifications. Ensure compatibility with -4.5 V ECL power supplies. Check for lead-free compliance status if required by project regulations, as original manufacturing records may indicate non-compliance with modern RoHS standards. Confirm pinout alignment with target PCB layout.

Selection Notes

Select this component when designing circuits requiring multiple synchronized D-latches with minimal propagation delay. The ECL100K series offers superior speed compared to standard TTL or CMOS families. Consider the ceramic package's thermal properties for high-density boards. Verify that the system power supply can maintain the required -4.5 V rail with low noise to ensure signal integrity during fast switching events.

Part Context

This part belongs to the National Semiconductor ECL100K family, a line of high-speed emitter-coupled logic devices. These components were widely used in telecommunications and computing infrastructure before the industry shifted toward lower voltage CMOS technologies. The 100131 variant specifically provides triple D-flip-flop functionality, serving as a building block for complex sequential logic designs requiring precise timing control.

Replacement Considerations

Consult official cross-reference guides for equivalents from onsemi or other manufacturers. Verify that any substitute maintains the same ECL100K logic level, -4.5 V operating voltage, and 24-pin QFP footprint. Ensure functional equivalence regarding master-slave triggering and propagation delay characteristics.