74ACT109SCX

Overview

The onsemi 74ACT109SCX is a dual JK-type flip-flop integrated circuit belonging to the 74F logic family. It features positive-edge triggering and includes set (preset) and reset functions. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports a clock frequency up to 125 MHz. It is housed in a 16-SOIC package with a width of 0.154 inches (3.90 mm). The component provides complementary outputs and has a maximum propagation delay of 8 ns at 5 V with 50 pF load. It is rated for an operating temperature range of 0°C to +70°C.

Feature Summary

• Dual configuration containing two independent JK-type flip-flops
• Positive-edge triggered operation with dedicated set and reset inputs
• Complementary output structure for versatile signal routing
• High-speed performance supporting clock frequencies up to 125 MHz

Applications

• Digital counter circuits requiring high-speed state transitions
• Shift register configurations for data storage and transfer
• Frequency division and timing control modules
• Sequential logic systems in test and measurement equipment

Procurement Notes

Verify that the specific part number matches the 74F family designation, as confusion with similar ACT or Q series variants may occur. Confirm the SOIC-16 package dimensions and pinout compatibility with existing board layouts. Ensure the operating temperature range of 0°C to +70°C meets the environmental requirements of the target application. Check RoHS compliance documentation for material composition verification prior to integration.

Selection Notes

Select this component when dual JK flip-flops with positive-edge triggering are required in a surface-mount format. The 74F family offers higher speed than standard LS counterparts but consumes more power. Consider the 0°C to +70°C industrial temperature range limitations. Evaluate the 125 MHz clock capability against system timing constraints. Compare against alternative manufacturers offering direct pin-compatible replacements if supply chain stability is a concern.

Part Context

This device is part of the broader 74F logic family, known for fast switching speeds compared to standard TTL equivalents. The 74ACT109SCX specifically integrates two JK flip-flops into a single 16-pin package. It serves as a fundamental building block for sequential digital logic designs. The SCX suffix indicates the SOIC-16 surface mount packaging variant manufactured by onsemi.

Replacement Considerations

SN74F109D and SN74F109DR from Texas Instruments are confirmed direct substitutes.