74AC125SC

Buffers, Drivers, Receivers, Transceivers Overview

The 74AC125SC is a quad buffer with 3-state outputs manufactured by Fairchild Semiconductor. It operates within a supply voltage range of 2.0V to 6.0V and supports an operating temperature from -40°C to +85°C. The device features non-inverting logic, providing high-level output current of 24mA and low-level output current of 24mA. Propagation delay is typically 6.5ns at 3.3V and 5.5ns at 5.0V. Input leakage current is guaranteed at ±1.0µA maximum, while quiescent supply current is limited to 40.0µA.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Contains four independent non-inverting buffers with 3-state outputs for bus-oriented applications.
• Outputs are capable of sourcing and sinking 24mA to drive loads directly.
• Supply current is reduced by 50% compared to previous AC series devices.

Buffers, Drivers, Receivers, Transceivers Applications

• Bus-oriented systems requiring signal buffering.
• Clock distribution circuits.
• Memory address drivers.

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the manufacturer origin, as this part was originally produced by Fairchild Semiconductor before its acquisition by onsemi. Confirm that the specific ordering number matches the SOIC-14 package variant (M14A) intended for your design. Ensure compliance with RoHS standards if required by your manufacturing process.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when a quad buffer with 3-state control is needed for AC logic families. It is suitable for designs requiring operation across a wide voltage range from 2V to 6V. Consider the propagation delay specifications relative to your system clock speeds to ensure timing requirements are met.

Buffers, Drivers, Receivers, Transceivers Part Context

This component belongs to the 74AC logic family, known for high-speed performance and low power consumption. It is functionally compatible with other 74AC series devices but offers improved speed over standard 74HC or 74HCT counterparts. The SC suffix specifically denotes the 14-Lead Small Outline Integrated Circuit package.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Equivalent parts include MC74AC125DG and MC74AC125DR2G from onsemi. Other manufacturers may offer pin-compatible alternatives such as SN74AC125 from Texas Instruments, provided electrical characteristics match the application requirements.

Buffers, Drivers, Receivers, Transceivers FAQ

What is the difference between the 74AC125 and 74ACT125?

The primary difference lies in input thresholds. The 74ACT125 has TTL-compatible input thresholds, making it suitable for interfacing with TTL logic levels, whereas the 74AC125 uses CMOS thresholds.

How does the 3-state output function work?

When the output enable input is active, the buffer drives the output based on the data input. When the enable input is inactive, the output enters a high-impedance state, effectively disconnecting it from the circuit.