ON Semiconductor MC74VHC125DT Quadruple Bus Buffer

The ON Semiconductor MC74VHC125DT is a high-speed quadruple bus buffer designed to meet the requirements of high-speed VLSI systems. This integrated circuit is part of the VHC family, which is renowned for its low power consumption and high noise immunity, making it an ideal choice for interfacing with 5V systems. The MC74VHC125DT features four independent non-inverting buffer gates with 3-state outputs, which makes it a versatile component for a wide range of applications including bus driving, signal gating, and signal buffering.

Each buffer has its own output enable (OE) pin, which controls the state of the output. When OE is low, the output is active and reflects the input signal. When OE is high, the output is in a high impedance state, effectively isolating the buffer from the bus. This tri-state feature allows multiple outputs to connect to a bus without the risk of contention, as the outputs can be disabled to prevent them from interfering with each other.

The MC74VHC125DT operates over a broad voltage range of 2V to 5.5V and provides symmetrical output impedance. This ensures good signal characteristics for driving long lines or for loading high-input impedance devices. The inputs can tolerate voltages up to 5.5V, regardless of the operating voltage, which makes the device tolerant to over-voltage conditions and compatible with mixed-voltage systems.

Constructed with silicon gate CMOS technology, the MC74VHC125DT offers superior switching performance with a propagation delay time of approximately 8.5ns at 5V. The device is also characterized for operation from -55°C to +125°C, ensuring reliability in extreme temperature conditions. Its robust design and latch-up performance meet the requirements of the JEDEC standard JESD 17.

The MC74VHC125DT is available in a TSSOP-14 package, which provides a compact footprint for space-constrained applications. Its lead-free and RoHS-compliant design demonstrates ON Semiconductor's commitment to environmental sustainability. With its combination of high-speed operation, low power consumption, and versatile functionality, the MC74VHC125DT is an excellent choice for designers looking to enhance the performance and efficiency of their digital systems.