MC74AC125DR2G

Overview

The MC74AC125DR2G is a quad 3-state buffer manufactured by onsemi, utilizing high-performance silicon-gate CMOS technology. It operates within a supply voltage range of 2.0 V to 6.0 V and supports an operating ambient temperature from -40°C to +85°C. The device features four non-inverting inputs and outputs capable of sourcing or sinking up to 24 mA. Propagation delay is specified at 9 ns maximum at 3.3 V and 7 ns maximum at 5.0 V with a 50 pF load. It is housed in a 14-lead SOIC package (Case 751A) and is supplied in tape and reel packaging.

Feature Summary

• Quad 3-state buffering with low enable functionality
• High drive capability with 24 mA source/sink output current
• Wide operating voltage range supporting 2V to 6V systems
• Lead-free construction compliant with environmental standards

Applications

• Bus-oriented communications systems
• Clock distribution buffers
• Memory module data line drivers

Procurement Notes

Verify the specific ordering suffix 'R2G' corresponds to the tape and reel shipping configuration rather than tube packaging. Confirm that the required package variant matches the SOIC-14 form factor defined in Case 751A. Ensure the application environment remains within the specified -40°C to +85°C thermal limits for reliable operation.

Selection Notes

Select this component when a quad buffer with tri-state control is required for bus applications. The AC series offers faster propagation delays compared to standard HC logic while maintaining compatibility with 2V to 6V power rails. Verify input threshold requirements against the driving source voltage levels to ensure proper logic switching margins.

Part Context

This part belongs to the MC74AC125 family of quad buffers. It shares functional characteristics with the MC74ACT125, though the ACT variant provides TTL-compatible input thresholds specifically designed for 5V operation. Both variants utilize the same pinout and package options, allowing for potential design flexibility based on input signal compatibility needs.

Replacement Considerations

MC74AC125DG serves as a direct functional equivalent packaged in tubes instead of tape and reel.