74FR74SC

Overview

The 74FR74SCX is a dual D-type flip-flop manufactured by Fairchild Semiconductor, designed for high-speed digital logic applications. It features positive edge-triggered operation with TTL-compatible inputs and outputs capable of sourcing and sinking 24 mA. The device is housed in a 14-lead Small Outline Integrated Circuit (SOIC) package, specifically the N14A JEDEC MS-012 form factor. Key electrical specifications include a maximum operating frequency of 150 MHz at nominal supply voltage and a guaranteed pin-to-pin skew specification to ensure timing accuracy in synchronous circuits.

Feature Summary

• Dual D-type flip-flop architecture with positive edge-triggered clocking
• TTL-compatible input and output levels for broad interface compatibility
• High current drive capability with 24 mA source and sink capacity
• Guaranteed pin-to-pin skew specifications for precise timing control

Applications

• Synchronous data storage and transfer in digital systems
• Bus-oriented applications requiring reliable state retention
• High-speed logic circuits demanding low skew performance

Procurement Notes

Verify the specific suffix 'SCX' against the manufacturer's ordering information to confirm the SOIC-14 tape and reel packaging variant. Ensure the component meets RoHS compliance requirements if applicable, as standard listings may indicate non-compliance for older FR series variants. Cross-reference the JESD-609 code e0 for lead finish details during quality assurance checks.

Selection Notes

Select this component when a dual D-type flip-flop with high current drive and strict skew limits is required. It serves as an alternative to standard 74HC or 74HCT series devices where faster switching speeds and higher output currents are necessary. Consider the 150 MHz frequency limit and the specific 14-lead SOIC footprint constraints during PCB layout and system design.

Part Context

The 74FR74 belongs to the FR/FASTR family of logic devices from Fairchild Semiconductor, characterized by fast switching speeds and robust output drivers. This family bridges the gap between standard CMOS logic and Bipolar Schottky TTL performance while maintaining CMOS power advantages. The 74FR74 specifically provides two independent D-type flip-flops in a compact package suitable for dense digital designs.

Replacement Considerations

Public confirmed substitute part numbers include 74FR1074, which offers similar dual D-type flip-flop functionality within the same FASTR family.