74HCT125DB,118

Overview

The Nexperia 74HCT125DB,118 is a quad buffer and line driver featuring three-state outputs controlled by active-low output enable inputs. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an ambient temperature range from -40 °C to +125 °C. The device utilizes TTL input levels and provides non-inverting logic functions. It is housed in a 14-lead SO plastic small outline package (SOT108-1). Key electrical characteristics include a propagation delay of up to 38 ns at 4.5 V and a low-level output current capability of 6 mA.

Feature Summary

• Provides four independent non-inverting buffers with three-state outputs for bus-oriented applications.
• Features active-low output enable inputs that force outputs into a high-impedance OFF-state when asserted HIGH.
• Includes input clamp diodes to allow interfacing with voltages exceeding the supply voltage using current-limiting resistors.
• Offers high noise immunity and CMOS low power dissipation characteristics suitable for digital signal buffering.

Applications

• Bus-oriented systems requiring signal isolation and drive enhancement.
• Clock distribution circuits where controlled output impedance is necessary.
• Data acquisition systems utilizing TTL-compatible logic interfaces.
• Memory address and data bus drivers in embedded controller designs.

Procurement Notes

Verify component authenticity through authorized Nexperia distributors or verified suppliers. Confirm the specific ordering suffix matches the required package variant. Ensure compliance with RoHS directives and REACH regulations as specified in the product documentation. Check for any end-of-life notices or production discontinuation status prior to finalizing procurement plans.

Selection Notes

Select this component when TTL logic level compatibility is required alongside CMOS performance benefits. The 74HCT125DB,118 is appropriate for designs needing four buffered channels with independent tri-state control. Consider the SO14 package dimensions for PCB layout constraints. Verify that the operating temperature range meets the environmental requirements of the target application.

Part Context

This part belongs to the 74HCT series of logic integrated circuits manufactured by Nexperia. It is functionally compatible with other 74HCT family members but offers specific buffering capabilities. The DB suffix indicates the SO14 plastic small outline package variant. It serves as a standard solution for digital signal conditioning in mixed-voltage environments.

Replacement Considerations

The 74HCT125PW,118 is a confirmed substitute offering identical logical functionality in a TSSOP14 package. Designers must verify pin-to-pin compatibility and ensure the alternative package fits the existing footprint or allows for re-layout.