74HC125D/AUJ

Overview

The Nexperia 74HC125D/AUJ 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 2.0 V to 6.0 V, ensuring CMOS low power dissipation and high noise immunity. The device complies with JEDEC standards JESD8C and JESD7A, supporting input levels compatible with both CMOS and TTL logic families. It includes input clamp diodes for interfacing with voltages exceeding VCC and offers robust ESD protection against human body model and charged device model events.

Feature Summary

• Quad buffer/line driver with three-state outputs controlled by active-low enable inputs
• Wide supply voltage range from 2.0 V to 6.0 V with CMOS low power dissipation
• High noise immunity and latch-up performance exceeding 100 mA per JESD 78 Class II Level B
• Input clamp diodes allow interfacing with voltages in excess of VCC using current limiting resistors

Applications

• Bus-oriented communications systems requiring signal buffering
• Clock distribution networks utilizing high noise immunity
• Memory module data line drivers with three-state control capabilities

Procurement Notes

Verify the specific ordering suffix 'AUJ' against official Nexperia documentation to confirm package type and temperature range specifications. Ensure compatibility with SOIC-14 or TSSOP-14 requirements as defined in the datasheet. Confirm that the procurement channel provides authentic Nexperia products to guarantee adherence to specified electrical characteristics and reliability standards.

Selection Notes

Select this component when designing circuits requiring four buffered outputs with independent three-state control. Consider the 2.0 V to 6.0 V operating range for flexibility across different logic voltage domains. Evaluate the high noise immunity and ESD protection features for environments susceptible to electrical interference or static discharge events during operation.

Part Context

This part belongs to the 74HC/HCT125 family of quad buffers manufactured by Nexperia. It serves as a standard logic interface component for digital systems. The device integrates four independent buffers, each with its own output enable control, facilitating complex bus architectures and signal routing applications in consumer electronics and industrial equipment.

Replacement Considerations

Compatible substitutes include the 74HCT125D for TTL-compatible input levels and other manufacturers' equivalents such as the SN74HC125N. Verify pinout compatibility and electrical parameter alignment before substitution.

FAQ

How does the output enable input function affect the buffer state?

A HIGH level on the nOE input forces all outputs into a high-impedance OFF-state, effectively disconnecting them from the circuit.

What is the purpose of the input clamp diodes?

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