Texas Instruments

CD74HC123EE4

CD74HC123EE4 Description

The CD74HC123EE4 is a high-speed CMOS logic dual retriggerable monostable multivibrator from Texas Instruments, designed for a wide range of digital applications. This IC features two independent monostable circuits, making it highly versatile for various timing and pulse control applications. The device operates within a supply voltage range of 2 V to 6 V, ensuring compatibility with a broad spectrum of power supply configurations. With a propagation delay of 26 ns, it offers rapid response times, making it suitable for high-speed digital systems.

CD74HC123EE4 Features

• Monostable Logic Type: The CD74HC123EE4 is designed as a monostable multivibrator, which means it can generate a single pulse of a specified duration in response to a trigger input. This feature is particularly useful for applications requiring precise timing control.
• Schmitt Trigger Input: The inclusion of Schmitt trigger inputs ensures reliable operation by providing noise immunity and stable performance, even with noisy or slow-rising input signals.
• Independent Circuits: The device comprises two independent monostable circuits, allowing for simultaneous operation of two separate timing functions within a single package. This dual functionality reduces the need for multiple ICs, saving space and cost.
• High-Speed Performance: With a propagation delay of 26 ns, the CD74HC123EE4 is capable of operating at high speeds, making it suitable for demanding digital applications.
• Wide Supply Voltage Range: The IC operates within a supply voltage range of 2 V to 6 V, providing flexibility and compatibility with various power supply systems.
• Through Hole Mounting: The through-hole mounting type ensures robust mechanical stability and ease of integration into printed circuit boards (PCBs).
• Compliance and Standards: The CD74HC123EE4 is REACH unaffected and ROHS3 compliant, adhering to environmental and safety standards. It also carries an ECCN classification of EAR99, indicating its compliance with export regulations.

CD74HC123EE4 Applications

The CD74HC123EE4 is ideal for a variety of applications that require precise timing and pulse control. Some specific use cases include:

• Pulse Generation: Ideal for generating precise timing pulses in digital circuits, such as clock signals or timing intervals for data transmission.
• Noise Filtering: The Schmitt trigger inputs make it suitable for filtering out noise from digital signals, ensuring clean and reliable operation.
• Debouncing: Effective in debouncing mechanical switches in digital systems, providing stable and accurate switch state detection.
• Timing Circuits: Useful in applications requiring precise timing intervals, such as delay circuits, timing control in communication systems, and signal synchronization.
• Pulse Width Modulation (PWM): Can be employed in PWM applications where precise control over pulse width is necessary.

Conclusion of CD74HC123EE4

The CD74HC123EE4 from Texas Instruments is a versatile and high-performance monostable multivibrator IC, offering dual independent circuits and a wide supply voltage range. Its high-speed operation, Schmitt trigger inputs, and compliance with environmental standards make it a reliable choice for a variety of digital applications. Despite being marked as obsolete, the CD74HC123EE4 remains a valuable component for engineers and designers seeking precise timing control and pulse generation in their systems.