CD74HC125E

Overview

The CD74HC125E is a high-speed CMOS logic quad buffer with three-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and features a PDIP-14 package for through-hole mounting. The device provides differential outputs and supports LV TTL input levels. Key electrical characteristics include a maximum propagation delay of 160 ns, a low-level output current of 5.2 mA, and a high-level output current of -5.2 mA. It functions reliably across an extended temperature range from -55°C to +125°C.

Feature Summary

• Quad configuration providing four independent buffering channels within a single integrated circuit
• Three-state output capability allowing controlled disconnection from the bus line
• High-speed CMOS technology enabling operation at elevated frequencies with low power consumption
• Wide operating voltage range supporting compatibility with various digital logic systems

Applications

• Bus-oriented memory and signal driving applications
• Clock distribution circuits requiring buffered signals
• Data acquisition systems utilizing multiplexed data lines
• Industrial control systems operating in extreme temperature environments

Procurement Notes

Verify that the specific part number matches the required package type and lead-free status. Confirm the manufacturer source to ensure authenticity. Check RoHS compliance documentation if environmental regulations apply to your assembly process. Ensure the ordering suffix aligns with your preferred packaging format. Validate the component against the official datasheet specifications before integration into production designs.

Selection Notes

Select this component when a quad buffer with three-state outputs is required for bus isolation or signal conditioning. The HC series offers faster switching speeds compared to standard 74LS logic while maintaining CMOS power efficiency. Consider the PDIP-14 package only if through-hole mounting is mandated by the PCB design constraints. Verify that the input voltage levels are compatible with the driving logic family used in the system architecture.

Part Context

This component belongs to the Texas Instruments CD74HCxx series of high-speed CMOS logic devices. The series is designed for general-purpose digital applications requiring robust performance and wide voltage operation. The CD74HC125 specifically addresses the need for multiple buffered outputs with tri-state control in a compact 14-pin dual in-line package suitable for prototyping and industrial enclosures.

Replacement Considerations

Compatible substitutes include the SN74HC125N and CD74HC125M. These alternatives offer identical logical functionality and pinout configurations. Verify that any replacement maintains the same three-state output behavior and voltage tolerance levels to ensure seamless integration without circuit redesign.