MC74VHC126DTR2

Overview

The MC74VHC126DTR2 is a quad bus buffer with 3-state control inputs, fabricated using silicon gate CMOS technology. It operates within a voltage range of 2.0 V to 5.5 V and supports an operating temperature from -55°C to +125°C. The device features high-speed operation with a typical propagation delay of 3.8 ns at 5.0 V. It provides balanced propagation delays, low power dissipation with a maximum quiescent current of 40 µA, and high noise immunity. The inputs tolerate voltages up to 5.5 V, enabling interface between 5 V and 3 V systems.

Feature Summary

• High-speed CMOS bus buffering with active-high output enable control
• Power-down protection on inputs prevents device destruction during supply mismatch
• Outputs provide full 5.0 V CMOS level swings for interfacing different logic families
• Robust ESD performance exceeding 2000 V via Human Body Model

Applications

• Level conversion between 3.3 V and 5.0 V systems
• Interfacing 5 V systems to 3 V systems
• Bus driver applications requiring high noise immunity

Procurement Notes

Verify the specific package suffix matches the required form factor, as the datasheet lists both SOIC-14 and TSSOP-14 options under the same base part number. Confirm that the ordering suffix indicates lead-free compliance if RoHS requirements are mandatory. Ensure the revision date of the datasheet aligns with the manufacturing lot specifications for automotive or industrial qualification needs.

Selection Notes

Select this component when a quad non-inverting buffer with tri-state capability is required for high-speed digital interfaces. It is suitable for designs needing compatibility with standard CMOS levels while maintaining low power consumption. Consider the input voltage tolerance characteristics when connecting to mixed-voltage logic families without additional level shifting circuitry.

Part Context

This device belongs to the 74VHC series of high-speed CMOS logic products manufactured by onsemi. It is functionally compatible with other standard logic families in terms of pinout and basic operations. The product line emphasizes performance similar to Bipolar Schottky TTL while retaining the low power advantages of CMOS technology.

Replacement Considerations

Direct replacement options include the MC74VHC126DTR2G variant which includes lead-free packaging markings.