74VHC14SJX

Inverter Gates Overview

The Fairchild Semiconductor 74VHC14SJX is a hex Schmitt inverter integrated circuit manufactured using advanced sub-micron silicon gate and double-layer metal wiring CMOS technology. It features six independent inverters with Schmitt trigger inputs to ensure stable output and high noise immunity for signals with slow rise or fall times. The device operates within a supply voltage range of 2 V to 5.5 V, providing power-down protection on all inputs that allows acceptance of 0 to 7 V regardless of the supply voltage. It offers symmetrical output impedance with minimum drive currents of 8 mA for both high and low states. The component is housed in a 14-SOP surface-mount package.

Inverter Gates Feature Summary

• Hex Schmitt inverter configuration with hysteresis for noise immunity
• Power-down protection allowing 0-7 V input tolerance at any supply voltage
• Symmetrical output impedance with balanced propagation delay characteristics
• ESD protection circuits providing 2 kV HBM immunity

Inverter Gates Applications

• Line receivers handling slow rise/fall input signals
• Voltage level interfacing between 5 V and 3 V systems
• Signal conditioning for noisy digital environments

Inverter Gates Procurement Notes

Verify the specific suffix 'SJX' against official Fairchild or onsemi documentation, as standard datasheets often list base part numbers like 74VHC14 without packaging details. Confirm if this specific tape-and-reel variant is currently active or obsolete, as legacy Fairchild logic parts may have been transitioned to onsemi manufacturing lines. Ensure the 14-SOP package dimensions match your PCB footprint requirements before finalizing procurement.

Inverter Gates Selection Notes

Select this component when high noise immunity is required for digital signal inversion. The Schmitt trigger function makes it suitable for applications where input signals are not square waves or contain significant noise. The wide operating voltage range and power-down protection facilitate use in mixed-voltage systems. Compare propagation delay specifications against system timing requirements to ensure compatibility with clock speeds.

Inverter Gates Part Context

This component belongs to the 74VHC series, which represents advanced high-speed CMOS logic. It is functionally compatible with the 74HC14 pinout but offers improved speed and lower power consumption due to sub-micron technology. The 74VHC14 serves as the Schmitt trigger variant of the standard 74VHC04 hex inverter, adding hysteresis to prevent multiple triggering from noisy inputs.

Inverter Gates Replacement Considerations

Public confirmed substitute part numbers include MC74VHC14DG and 74AHC14D,118.