74AC74SJ

Overview

The onsemi 74AC74SJ is a dual D-type edge-triggered flip-flop belonging to the 74AC logic series. It features single-ended inputs and provides differential outputs with both inverting and non-inverting polarities. The device operates within a supply voltage range of 2 V to 6 V and supports through-hole mounting in a PDIP-14 package. Key electrical specifications include a propagation delay of 14 ns, high-level output current of -24 mA, and low-level output current of 24 mA. It functions reliably across an operating temperature range from -40 °C to +85 °C.

Feature Summary

• Dual D-type positive edge-triggered flip-flops with differential outputs
• High drive capability with 24 mA source and sink currents
• Wide operating voltage range supporting 2 V to 6 V systems

Applications

• Parallel data storage and register applications
• Shift register construction for serial-to-parallel conversion
• Timing control circuits requiring precise edge triggering

Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm package integrity and pin alignment for the PDIP-14 configuration. Ensure compatibility with system voltage levels between 2 V and 6 V. Validate that the specific suffix matches the required through-hole mounting style. Cross-reference lot codes with manufacturer records for traceability.

Selection Notes

Select this component when dual independent D-type flip-flops are required in a through-hole format. The 74AC series offers faster switching speeds compared to standard 74LS equivalents while maintaining CMOS power efficiency. Ensure the application requires differential outputs and operates within the specified 2 V to 6 V voltage window. Verify that the 14 ns propagation delay meets the timing constraints of the target digital circuit design.

Part Context

This part belongs to the broader 74AC family of high-speed CMOS logic devices manufactured by onsemi. The AC series is characterized by superior speed-performance-to-power dissipation ratios compared to earlier generations. As a dual flip-flop, it integrates two independent storage elements into a single package, reducing board space requirements for sequential logic designs.

Replacement Considerations

MC74AC74PC: Identical functional specification in PDIP-14 package.