74VHC74MX

Overview

The Fairchild Semiconductor 74VHC74MX is a dual D-type flip-flop featuring independent preset and clear inputs. It utilizes advanced silicon-gate CMOS technology to deliver operating speeds comparable to equivalent LS-TTL parts while maintaining high noise immunity and low power consumption. The device operates within a wide supply voltage range of 2V to 6V, supporting up to 10 LS-TTL loads. It is housed in a 14-SOIC surface-mount package with a typical propagation delay of 20ns.

Feature Summary

• Dual D-type flip-flops with independent data, preset, clear, and clock inputs
• Advanced silicon-gate CMOS technology for high speed and low power
• Wide power supply range from 2V to 6V
• High noise immunity suitable for memory address decoding

Applications

• Memory address decoding systems
• Data routing applications
• Parallel-to-serial conversion circuits
• General-purpose digital logic storage

Procurement Notes

Verify the specific manufacturer marking on the component body against official datasheets to confirm authenticity. Ensure the package type matches the required 14-SOIC footprint. Check for RoHS compliance status if environmental regulations apply to your assembly process. Confirm that the pinout orientation aligns with your PCB layout design before finalizing procurement orders.

Selection Notes

Select this component when dual D-type flip-flop functionality is required in a compact surface-mount form factor. It is suitable for designs needing compatibility with both 3.3V and 5V logic levels due to its wide supply range. Consider this part for applications requiring moderate switching speeds with low static power dissipation. Ensure the input voltage levels remain within the specified limits for reliable operation.

Part Context

This component belongs to the 74VHC series of high-speed CMOS logic devices. The VHC series offers performance improvements over standard HC logic, providing faster switching speeds while maintaining low power consumption. It is designed to replace older TTL-based solutions in modern low-voltage digital systems, offering better noise margins and drive capabilities.

Replacement Considerations

Equivalent parts include MM74HC74AMX and MM74HC74AMTC. Verify pin compatibility and electrical specifications before substitution. Ensure the replacement device supports the same voltage range and package dimensions.