74VHC374SJX

Overview

The Fairchild Semiconductor 74VHC374SJX is an octal D-type flip-flop with 3-STATE outputs, fabricated using advanced sub-micron silicon gate and double-layer metal wiring C2MOS technology. It operates within a voltage range of 2V to 5.5V, achieving a typical maximum frequency of 270 MHz at 5V supply. The device features high noise immunity with VNIH and VNIL minimums of 28% VCC, and provides power-down protection on all inputs. It offers symmetrical output impedance with |IOH| = IOL = 8 mA (min) and balanced propagation delays. Quiescent current is maximized at 4 µA at 25°C ambient temperature.

Feature Summary

• Advanced sub-micron silicon gate and double-layer metal wiring C2MOS technology for high-speed operation
• Octal D-type flip-flop architecture with non-inverting 3-STATE outputs suitable for bus-oriented systems
• High noise immunity characteristics with defined minimum noise voltage levels relative to supply voltage
• Power-down protection provided on all inputs to prevent undefined states during power transitions

Applications

• Bus-oriented data storage and transfer in digital systems
• High-speed clocked memory applications requiring low power dissipation
• Interface circuits between logic families requiring high noise immunity
• General-purpose octal register applications in consumer electronics

Procurement Notes

Verify the specific suffix 'SJX' against official Fairchild or onsemi documentation to confirm package type and tape/reel specifications. Ensure compatibility with RoHS and REACH regulations as required by your manufacturing standards. Cross-reference the manufacturer part number with current onsemi catalogs, as Fairchild's logic division was acquired. Confirm availability status, as older suffixes may indicate end-of-life or replacement parts.

Selection Notes

Select this component when high-speed performance near 270 MHz is required alongside low power consumption typical of CMOS logic. The 3-STATE output feature makes it ideal for multi-drop bus architectures where multiple devices share data lines. Consider the 2V to 5.5V operating range for flexibility in varying supply environments. Ensure input requirements match the system's logic levels, noting the high noise immunity margins provided by the VHC series design.

Part Context

The 74VHC374 belongs to the VHC (Very High Speed CMOS) family, which bridges the performance gap between standard HC logic and faster Schottky TTL equivalents while maintaining CMOS power advantages. This octal flip-flop variant provides eight independent D-type latches controlled by a single clock and output enable signal. The SJX suffix typically denotes a specific surface-mount package configuration and shipping format, distinguishing it from other variants like MTC or SC.

Replacement Considerations

Direct substitutes include the MM74VHC374SJX from onsemi, which maintains identical pinout and functionality. Other compatible alternatives within the same family are the 74VHC374SCX and 74VHC374MTCX. Verify that any replacement part matches the specific SJX package dimensions and thermal characteristics if board space is constrained.