74HCT125PW,112

Overview

The Nexperia 74HCT125PW,112 is a quad buffer and line driver featuring three-state outputs controlled by active LOW output enable inputs (nOE). It belongs to the HCT logic family, utilizing TTL input levels for compatibility with standard digital systems. The device operates within a supply voltage range of 4.5 V to 5.5 V. It provides four non-inverting buffers in a TSSOP14 package (SOT402-1), suitable for surface-mount applications across an industrial temperature range of -40 °C to +125 °C.

Feature Summary

• Features four independent non-inverting buffers with high-impedance OFF-states controlled by active LOW enable signals.
• Accepts TTL-level input voltages, ensuring direct interface compatibility with Transistor-Transistor Logic systems.
• Includes input clamp diodes to facilitate current limiting resistor usage when interfacing with voltages exceeding the supply rail.
• Complies with JEDEC standards and offers robust ESD protection against Human Body Model and Charged Device Model events.

Applications

• Bus-oriented memory and address drivers
• Clock buffering and distribution circuits
• Voltage level translation between TTL and CMOS domains

Procurement Notes

Verify the specific ordering suffix '112' against official Nexperia documentation to confirm tape-and-reel packaging specifications. Ensure the selected variant matches the required TSSOP14 package dimensions and thermal characteristics for your PCB layout. Cross-reference the full part number with the manufacturer's latest datasheet revision to validate compliance with current environmental directives.

Selection Notes

Select this component when designing systems requiring TTL-compatible inputs alongside CMOS drive capabilities. The HCT series ensures low power dissipation while maintaining noise immunity. Consider the TSSOP14 package for space-constrained designs requiring surface-mount technology. Verify that the operating temperature range meets the environmental requirements of the target application.

Part Context

This component is part of the broader 74HCT125 family, which includes variants in different packages such as SO14. The PW suffix specifically denotes the TSSOP14 plastic thin shrink small outline package. It shares functional equivalence with other quad buffer devices but is distinguished by its specific HCT logic family characteristics and pinout configuration.

Replacement Considerations

Compatible substitutes include the 74HC125PW for CMOS input levels or generic 74HCT125 equivalents from other manufacturers, provided they maintain identical pinouts and electrical specifications. Verify that any replacement device supports the same TSSOP14 package and operates within the specified voltage and temperature ranges.

FAQ

How does the output enable input function?

The outputs assume a high-impedance OFF-state when the nOE input is HIGH. When nOE is LOW, the data from the inputs is transmitted to the outputs.

What is the purpose of the input clamp diodes?

The input clamp diodes allow the use of current-limiting resistors to interface the inputs to voltages that exceed the supply voltage (VCC).