ON Semiconductor MC74VHCT125ADR2 Quad Bus Buffer

The ON Semiconductor MC74VHCT125ADR2 is a high-performance, quad bus buffer that features non-inverting 3-state outputs. This integrated circuit is designed to interface between two different voltage domains, making it particularly useful in mixed 3.3V/5V systems. The device belongs to the VHCT family, which means it is compatible with TTL levels and can be driven by TTL outputs without the need for external pull-up resistors.

This quad bus buffer is fabricated with silicon gate CMOS technology, ensuring high speed operation while maintaining CMOS low power dissipation. Its power-down high impedance inputs and outputs, along with the 3-state outputs, make it ideal for multiplexing and for implementing isolation during power-down conditions.

Key features of the MC74VHCT125ADR2 include:

• High-Speed Operation: The device is capable of functioning at high speeds, which is essential for modern digital applications that require rapid data processing and signal transmission.
• 5V Tolerant Inputs: Inputs can handle 5V signals even when the device is powered by a 3.3V supply, providing a great deal of flexibility in mixed-voltage environments.
• Low Power Consumption: Despite its high-speed capabilities, the device maintains low power dissipation, a hallmark of CMOS technology, making it suitable for power-sensitive applications.
• Output Drive Capability: The outputs can drive up to 8 LSTTL loads, ensuring compatibility with legacy TTL logic levels and providing sufficient current for most interfacing requirements.
• Pin and Function Compatible with Other Standard Logic Families: This makes the MC74VHCT125ADR2 an easy drop-in replacement for a variety of applications, facilitating upgrades and system redesigns without major changes to existing board layouts.

The device is offered in a small-outline package (SOIC) with 14 pins, denoted by the 'DR2' suffix in its part number. This compact form factor allows for efficient use of board space, which is crucial in high-density electronic designs.

With its robust design and versatile features, the ON Semiconductor MC74VHCT125ADR2 is a reliable and practical choice for designers looking to create efficient, high-speed digital systems that bridge different voltage domains.