74HCT126D,653

Overview

The Nexperia 74HCT126D,653 is a quad buffer and line driver featuring three-state outputs controlled by active-high enable inputs (nOE). It operates within a supply voltage range of 4.5 V to 5.5 V and accepts TTL-level input signals. The device provides high noise immunity and low power dissipation in a 14-lead SO plastic small outline package (SOT108-1). It supports an operating temperature range from -40 °C to +125 °C.

Feature Summary

• Quad buffer/line driver with three-state outputs
• TTL-compatible input levels
• High noise immunity and CMOS low power dissipation

Applications

• Bus-oriented transmissions
• Clock buffering and driving
• Memory address decoding

Procurement Notes

Verify the specific ordering code matches the required package variant. Confirm that the application environment remains within the specified electrical limits for the HCT series. Ensure proper handling procedures are followed due to ESD sensitivity specifications defined in JEDEC standards.

Selection Notes

Select this component when TTL logic compatibility is required alongside CMOS performance characteristics. The three-state capability allows multiple drivers to share a common bus without interference. Verify that the load capacitance requirements align with the dynamic switching speed specifications provided in the datasheet.

Part Context

This part belongs to the 74HCT family, which bridges HC technology with TTL logic levels. It shares the same pinout and physical dimensions as the 74HC126 but differs in input threshold voltages. The 'D' suffix indicates the SO14 surface-mount package configuration.

Replacement Considerations

The 74HC126D,653 serves as a functional equivalent if TTL input thresholds are not strictly required. Other manufacturers producing standard 74HCT126 devices in SOIC-14 packages may be compatible subject to electrical parameter verification.