MC74VHC126D

Overview

The MC74VHC126D is a high-speed CMOS quad bus buffer fabricated with silicon gate technology. It provides non-inverting operation with three-state outputs, designed for a 2.0 V to 5.5 V supply range. Key electrical parameters include a typical propagation delay of 3.8 ns at 5.0 V and maximum static current of 4.0 μA at 25°C. The device features balanced propagation delays, high noise immunity (28% VCC), and power-down protection on inputs. It offers latchup performance exceeding 300 mA and ESD protection greater than 2000 V via HBM.

Feature Summary

• High-speed non-inverting quad bus buffering with three-state control
• Low power dissipation and high noise immunity characteristics
• Power-down protection provided on all input lines

Applications

• Memory buffer applications
• Clock distribution buffering
• Driving capacitive loads across multiple buses

Procurement Notes

Verify the specific suffix against the manufacturer's official documentation to confirm package type, lead-free status, and tape/reel specifications. Ensure the part number matches the exact ordering code required for your manufacturing process. Cross-reference the datasheet revision date to confirm parameter validity. Confirm RoHS compliance status directly from the component marking or official specification sheet before procurement.

Selection Notes

Select this component when a quad bus buffer with three-state capability is required within a 2.0 V to 5.5 V operating range. It serves as a pin-compatible alternative to standard logic families while offering CMOS low power dissipation. Consider its high noise immunity and balanced propagation delays for signal integrity in high-speed digital systems requiring non-inverting buffering.

Part Context

This device belongs to the MC74VHC series of high-speed CMOS logic components manufactured by onsemi. The series is characterized by silicon gate technology that achieves performance similar to Bipolar Schottky TTL while maintaining low power consumption. The MC74VHC126 specifically functions as a quad bus buffer, providing four independent channels with three-state output control for efficient data routing.

Replacement Considerations

MC74VHC126DR2G and MC74VHC126DTR2G are listed as similar parts with identical functional descriptions.