74HCT126DB,112

Overview

The NXP USA Inc. 74HCT126DB,112 is a quad buffer and line driver featuring three-state outputs controlled by active HIGH output enable inputs (nOE). It utilizes HCT logic levels compatible with TTL standards and operates within a supply voltage range of 4.5 V to 5.5 V. The device incorporates input clamp diodes for interfacing with voltages exceeding VCC and provides ESD protection exceeding 2000 V per the Human Body Model. It is housed in an SSOP14 package (SOT337-1) and supports industrial temperature ranges from -40 °C to +125 °C.

Feature Summary

• Quad buffer/line driver architecture with independent high-level active output enables
• TTL-compatible input levels ensuring direct interface with standard logic families
• High electrostatic discharge protection capabilities compliant with JEDEC standards
• Input clamp diodes allowing safe operation with input voltages above the supply rail

Applications

• Bus-oriented memory and address drivers
• Clock buffering and distribution circuits
• Data bus transceivers requiring tri-state isolation
• Industrial control systems operating across extended temperature ranges

Procurement Notes

Verify the specific ordering suffix

Selection Notes

Select this component when TTL-compatible input thresholds are required alongside CMOS drive strength. Ensure the application demands active HIGH output enables rather than active LOW variants like the 74HC125. Confirm that the SSOP14 footprint aligns with the PCB layout constraints and that the 4.5 V to 5.5 V supply range matches the system power architecture.

Part Context

This part belongs to the 74HCTxx series of high-speed CMOS logic devices manufactured by NXP Semiconductors. It serves as the non-inverting counterpart to the 74HCT125, distinguished by its active HIGH enable logic. The device integrates four independent buffers into a single package, providing a compact solution for signal routing and level shifting in digital logic designs.

Replacement Considerations

Direct substitutes include other manufacturers' 74HCT126 equivalents in SSOP14 packages. Verify pin compatibility and electrical specifications against the original datasheet before substitution.