The MC74VHCT125A is a high speed CMOS quad bus buffer fabricated with silicon gate CMOS technology. It achieves high speed operation similar to equivalent Bipolar Schottky TTL while maintaining CMOS low power dissipation.
The MC74VHCT125A requires the 3−state control input (OE) to be set High to place the output into the high impedance state.
The VHCT inputs are compatible with TTL levels. This device can be used as a level converter for interfacing 3.3 V to 5.0 V, because it has full 5.0 V CMOS level output swings.

FEATUREs
• High Speed: tPD = 3.8 ns (Typ) at VCC = 5.0 V
• Low Power Dissipation: ICC = 4.0 μA (Max) at TA = 25°C
• TTL−Compatible Inputs: VIL = 0.8 V; VIH = 2.0 V
• Power Down Protection Provided on Inputs
• Balanced Propagation Delays
• Designed for 2.0 V to 5.5 V Operating Range
• Low Noise: VOLP = 0.8 V (Max)
• Pin and Function Compatible with Other Standard Logic Families
• Latchup Performance Exceeds 300 mA
• ESD Performance:
   Human Body Model > 2000 V;
   Machine Model > 200 V
• Chip Complexity: 72 FETs or 18 Equivalent Gates
• These Devices are Pb−Free and are RoHS Compliant