74VHCT74ASJX

Overview

The onsemi 74VHCT74ASJX is a dual D-type flip-flop integrated circuit featuring positive-edge triggering, set (preset), and reset functionality. It operates within a supply voltage range of 4.5V to 5.5V and supports standard CMOS inputs with complementary outputs capable of sourcing and sinking 8mA. The device exhibits a maximum propagation delay of 8.8ns at 5V with 50pF load and a clock frequency of 140MHz. Packaged in a 14-SOIC surface-mount format, it functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Dual D-type flip-flops with positive-edge triggering
• Integrated set and reset control functions
• Complementary output configuration for versatile logic interfacing

Applications

• Parallel data storage and register applications
• Shift register construction
• Timing and synchronization circuits

Procurement Notes

Verify component status carefully as this part number is officially listed as obsolete and end-of-life by the manufacturer. Confirm availability through authorized distributors or secondary market channels, noting that new production is discontinued. Ensure substitute components meet all electrical and mechanical specifications required for the target application design.

Selection Notes

Select this component only if legacy compatibility with the 74VHCT series is strictly required. Evaluate alternative active parts from the same family or compatible high-speed logic families to ensure long-term supply stability. Consider pin-to-pin replacements that offer updated manufacturing support while maintaining identical logical operations and interface characteristics.

Part Context

This component belongs to the VHCT logic family, which combines high-speed CMOS performance with TTL-compatible input thresholds. It serves as a fundamental building block for sequential logic designs requiring reliable state retention and precise timing control in digital systems.

Replacement Considerations

Public confirmed substitutes include SN74AHCT74NSR from Texas Instruments and 74AHC74D-Q100J from Nexperia USA Inc.