SN74S74DR

Flip Flops Overview

The SN74S74DR is a dual D-type positive-edge-triggered flip-flop manufactured by Texas Instruments. It features independent preset and clear inputs for direct control of output states. The device operates within a supply voltage range of 4.75 V to 5.25 V, typical of standard TTL logic families. It utilizes a 14-pin SOIC package suitable for surface-mount applications. Key electrical parameters include a propagation delay of 6.5 ns and high drive currents of -60 mA (high) and 40 mA (low). The component supports an operating temperature range from 0°C to +70°C.

Flip Flops Feature Summary

• Dual D-type configuration with positive-edge triggering
• Independent active-low preset and clear inputs
• High current drive capability for direct load driving
• Schmitt-trigger action on inputs for noise immunity

Flip Flops Applications

• Parallel data storage in digital systems
• Shift register construction
• Frequency division circuits
• Timing pulse generation

Flip Flops Procurement Notes

Verify the specific manufacturer source and authenticity before procurement. Confirm that the SN74S74DR meets the required voltage and temperature specifications for your application. Check for any obsolescence notices or lifecycle changes directly from Texas Instruments. Ensure the SOIC-14 package dimensions align with your PCB footprint requirements. Validate compliance with relevant environmental standards if applicable.

Flip Flops Selection Notes

Select this component when dual D-type flip-flops with preset and clear functions are required. Consider the high current drive capability for driving loads directly without additional buffers. Evaluate the 6.5 ns propagation delay against system timing requirements. Ensure the 4.75 V to 5.25 V supply voltage range matches the system power rails. Compare performance against other logic families if lower power consumption is critical.

Flip Flops Part Context

The SN74S74 belongs to the Texas Instruments SN74S series, known for speed-performance Schottky TTL logic. This series offers faster switching speeds compared to standard LS logic but consumes more power. The SN74S74 specifically provides dual D-type flip-flops, making it suitable for sequential logic applications requiring fast response times and robust drive capabilities in standard 5V logic environments.

Flip Flops Replacement Considerations

Direct pin-to-pin replacements may include the SN74LS74 for lower power consumption, though with slower speeds. The SN74HCT74 offers CMOS compatibility with TTL input levels. Verify voltage tolerance and drive current requirements when substituting. Check for availability as the SN74S74 may be considered obsolete in some supply chains.