74HCT125D,653

Overview

The Nexperia 74HCT125D,653 is a quad buffer and line driver featuring three-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 supports TTL input levels. The device provides high noise immunity and low power dissipation. Propagation delay is specified at 25 ns maximum at 4.5 V with a 50 pF load. It includes input clamp diodes for interfacing with voltages exceeding VCC.

Feature Summary

• Quad buffer/line driver with independent three-state outputs
• TTL-compatible input logic levels
• High noise immunity and CMOS low power dissipation
• Input clamp diodes allow interfacing with voltages exceeding VCC

Applications

• Bus-oriented communications systems
• Clock buffering and distribution
• Memory data bus drivers

Procurement Notes

Verify the specific ordering suffix matches the required package variant. Confirm RoHS compliance status against current manufacturing updates. Ensure ambient temperature requirements align with the -40 °C to +125 °C operating range. Check for any recent product change notices affecting pinout or electrical characteristics before finalizing design-in.

Selection Notes

Select this component when TTL-level compatibility is required alongside CMOS performance. The SO14 package offers a compact solution for surface-mount designs. Consider the propagation delay specifications relative to system clock speeds. Verify that the three-state control logic fits the bus architecture requirements.

Part Context

This part belongs to the 74HCT series of high-speed CMOS logic devices manufactured by Nexperia. It is functionally compatible with other 74HCT family members but specifically designed as a non-inverting buffer. The D suffix indicates the SO14 plastic small outline package with a 3.9 mm body width.

Replacement Considerations

Check for direct cross-references from other manufacturers offering identical 74HCT125 specifications in SO14 packages. Verify pin-to-pin compatibility if substituting with similar quad buffers from different vendors.