MC74HC74AFG

Flip Flops Overview

The MC74HC74AFG is a dual D-type flip-flop manufactured by onsemi, featuring positive-edge triggering and asynchronous Set and Reset inputs. It operates within a 2V to 6V supply range and supports clock frequencies up to 35 MHz. The device exhibits a maximum propagation delay of 17ns at 6V with 50pF load and draws 2µA static current. Packaged in a 14-SOIC (0.209", 5.30mm width) surface-mount format, it functions reliably across -55°C to 125°C. This component is part of the 74HC series and is currently obsolete.

Flip Flops Feature Summary

• Dual D-type flip-flops with individual Set, Reset, and Clock inputs
• Outputs directly interface to CMOS, NMOS, and TTL loads
• High noise immunity characteristic of CMOS devices

Flip Flops Applications

• Data storage and register applications
• Shift register implementations
• Timing control circuits

Flip Flops Procurement Notes

Verify component authenticity through authorized channels due to obsolete status. Confirm RoHS compliance requirements as specific batches may vary. Check for moisture sensitivity level 3 handling precautions during assembly. Validate pinout compatibility with LS74 standards if replacing legacy designs. Ensure supplier documentation matches the exact MC74HC74AFG suffix for package accuracy.

Flip Flops Selection Notes

Select this component for designs requiring dual independent D-flip-flops with set/reset functionality in a compact SOIC package. Consider the 2V-6V operating range for low-voltage logic interfaces. Evaluate the 17ns propagation delay against system timing constraints. Note that the device is obsolete; assess long-term availability risks before finalizing the design.

Flip Flops Part Context

The MC74HC74AFG belongs to the 74HC family of high-speed CMOS logic devices. It shares pinout compatibility with the older LS74 standard, facilitating easier upgrades or replacements in existing TTL-based systems. The 'FG' suffix denotes the specific 14-SOIC surface-mount package configuration used by onsemi for this variant.

Flip Flops Replacement Considerations

Direct substitutes include SN74HC74NSR from Texas Instruments and TC74HC74AF from Toshiba Semiconductor.