74HCT125PW,118

Overview

The Nexperia 74HCT125PW,118 is a quad buffer and line driver featuring 3-state outputs controlled by active LOW output enable inputs (nOE). It operates within a supply voltage range of 4.5 V to 5.5 V and accepts TTL input levels. The device provides non-inverting data transmission with high noise immunity and low power dissipation. It includes input clamp diodes for interfacing with voltages exceeding VCC. The component is housed in a TSSOP14 package (SOT402-1) and supports surface mount installation. It functions reliably across an ambient temperature range from -40 °C to +125 °C.

Feature Summary

• Quad buffer/line driver with 3-state outputs
• TTL input levels compatible
• Active LOW output enable control
• Input clamp diodes included

Applications

• Bus-oriented systems
• Clock buffering and distribution
• Memory address/data bus drivers
• Signal isolation between logic stages

Procurement Notes

Verify the specific ordering suffix '118' corresponds to the standard tape and reel packaging configuration as defined by Nexperia. Confirm that the TSSOP14 package variant matches the required PCB footprint dimensions. Ensure the procurement channel sources genuine Nexperia products to guarantee compliance with the specified electrical characteristics and RoHS directives.

Selection Notes

Select this component when TTL-compatible inputs are required for CMOS logic interfaces. The 3-state capability allows multiple drivers to share a common bus without contention. Verify that the operating voltage remains strictly within the 4.5 V to 5.5 V range to maintain valid logic thresholds. Consider the thermal derating requirements for the TSSOP14 package if total power dissipation exceeds baseline limits.

Part Context

This part belongs to the 74HCT series of high-speed CMOS logic devices manufactured by Nexperia. It is functionally equivalent to other quad buffer designs but specifically optimized for TTL-level input compatibility. The PW suffix indicates the TSSOP14 plastic thin shrink small outline package. It serves as a fundamental building block for digital signal routing and level shifting in mixed-voltage environments.

Replacement Considerations

Direct pin-compatible substitutes include the 74HCT125DB,118 (SSOP14 package) and generic equivalents from other manufacturers adhering to the same JEDEC standards. Verify that any replacement maintains the identical 3-state functionality and TTL input voltage thresholds.

FAQ

How does the output behave when the nOE input is HIGH?

When the nOE input is HIGH, all four outputs assume a high-impedance OFF-state, effectively disconnecting them from the circuit.

What is the purpose of the input clamp diodes?

The input clamp diodes allow the use of current-limiting resistors to interface inputs to voltages exceeding VCC, protecting the internal circuitry.