74HC126D

Overview

The Toshiba 74HC126D is a high-speed CMOS quad bus buffer featuring non-inverted, three-state outputs. Fabricated using silicon gate C2MOS technology, it provides performance comparable to LSTTL with low power consumption. The device requires the control input G to be set low to enable the output and achieve a high-impedance state. It operates within a supply voltage range of 2.0 V to 6.0 V and supports an operating temperature range from -40°C to 125°C.

Feature Summary

• High-speed operation with balanced propagation delays
• Low power dissipation characteristics
• Wide operating voltage range for flexible system integration

Applications

• Bus-oriented memory and data transmission systems
• Clock drivers
• Buffering applications requiring controlled signal directionality

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure package and tape/reel specifications match design requirements. Confirm RoHS compliance status directly with the supplier or through official datasheets prior to finalizing procurement orders.

Selection Notes

Select this component when a non-inverting buffer with active-low enable functionality is required. Ensure the application logic correctly drives the control input low to activate the outputs. Verify that the load capacitance and supply voltage remain within the specified AC and DC electrical limits for reliable operation.

Part Context

This part belongs to the 74HC series of high-speed CMOS logic integrated circuits manufactured by Toshiba Semiconductor and Storage. It is functionally related to the 74HC125D, differing primarily in the polarity of the control input required to enable the outputs.

Replacement Considerations

The 74HC125D serves as a functional substitute; however, designers must account for the inverted control logic where the 74HC125D enables on a high signal while the 74HC126D enables on a low signal.