74F109SJ

Flip Flops Overview

The Fairchild Semiconductor 74F109SJ is a dual positive edge-triggered J-K flip-flop belonging to the F/FAST logic series. It operates within a supply voltage range of 4.5V to 5.5V and features complementary outputs. The device supports a maximum clock frequency of 125 MHz with a typical propagation delay of 8ns at 5V and 50pF load. It includes set and reset functions, operates across a temperature range of 0°C to 70°C, and utilizes a 16-SOIC surface-mount package.

Flip Flops Feature Summary

• Dual positive edge-triggered J-K flip-flops with complementary outputs
• Integrated set and reset control functions for state management
• High-speed operation supporting up to 125 MHz clock frequencies

Flip Flops Applications

• Digital data storage and register circuits
• Frequency division and counter applications
• Sequential logic control systems

Flip Flops Procurement Notes

Verify component authenticity through authorized channels due to potential availability from multiple manufacturers under similar designations. Confirm specific suffix requirements against current datasheets as manufacturing sources may vary. Ensure compliance with RoHS standards if required by project specifications. Validate package dimensions and pinout compatibility during integration planning.

Flip Flops Selection Notes

Select this component for designs requiring high-speed sequential logic with dual independent flip-flops in a single package. Consider the 125 MHz performance limit when designing clock domains. Evaluate thermal dissipation requirements within the specified operating temperature range. Compare power consumption characteristics against alternative logic families for efficiency optimization.

Flip Flops Part Context

This part belongs to the 74F series, representing high-speed TTL-compatible logic. The 'SJ' suffix typically denotes a specific package variant or manufacturer-specific ordering code within the broader 74F109 family. It serves as a fundamental building block for complex digital systems requiring reliable state retention and fast switching capabilities.

Flip Flops Replacement Considerations

Direct substitutes include SN74F109D and SN74F109DR from Texas Instruments. Verify pinout and electrical parameter compatibility before substitution. Ensure that any replacement maintains the same positive edge-triggered functionality and complementary output configuration.