MC74VHCT126AM

Overview

The MC74VHCT126AM is a quad bus buffer and line driver manufactured by onsemi. It belongs to the VHCT logic series, which provides TTL-compatible inputs while maintaining CMOS low power dissipation characteristics. The device features four independent non-inverting buffers with three-state outputs controlled by high-level enable signals. It operates within a supply voltage range of 2.0 V to 5.5 V, ensuring compatibility with various digital systems. The component is designed for high-speed operation and offers robust noise immunity suitable for memory address drivers and clock distribution applications.

Feature Summary

• TTL-compatible input thresholds allow direct interfacing with standard TTL logic outputs without level shifting requirements.
• Three-state output control enables efficient bus sharing and data isolation in multi-driver environments.
• CMOS fabrication ensures low static power consumption while delivering high-speed signal propagation.

Applications

• Memory address buffering in computer systems
• Clock signal distribution networks
• Bus-oriented system interconnects

Procurement Notes

Verify the specific suffix 'AM' against the manufacturer's current ordering guide to confirm package type and tape/reel specifications. Ensure the procurement channel sources genuine onsemi components to guarantee electrical parameter compliance and reliability standards.

Selection Notes

Select this component when TTL-compatible inputs are required alongside CMOS power efficiency. The VHCT series bridges the gap between legacy TTL systems and modern low-voltage CMOS designs. Verify that the operating voltage range aligns with the target system's power supply rails before integration.

Part Context

This part is part of the 74VHCT family, which combines the speed of advanced CMOS technology with the input compatibility of TTL logic. It serves as a bridge component in mixed-logic systems, allowing seamless integration between older TTL-based peripherals and newer CMOS-based controllers or memory modules.

Replacement Considerations

Check for pin-compatible alternatives such as the MC74HC126 series if TTL input thresholds are not strictly required. Verify that any substitute maintains the same three-state control logic and voltage operating range to ensure functional equivalence in the existing circuit design.