Texas Instruments

CD74HC123M  

Multivibrators

CD74HC123M Description

The CD74HC123M from Texas Instruments is a high-speed dual retriggerable monostable multivibrator from the 74HC series, designed for precision timing applications. Housed in a 16-SOIC package, it operates within a 2V to 6V supply range, making it compatible with both 3.3V and 5V systems. With a propagation delay of just 25 ns, it ensures rapid response in time-critical circuits. This device features two independent monostable circuits, each capable of producing accurate output pulses with adjustable timing via external RC components. It is RoHS3 compliant, REACH unaffected, and rated for MSL 1 (unlimited shelf life), ensuring reliability in industrial and consumer applications.

CD74HC123M Features

• Dual Independent Circuits: Two monostable multivibrators in one package, reducing board space and BOM complexity.
• Wide Voltage Range (2V–6V): Supports mixed-voltage designs and low-power applications.
• High Output Drive (5.2mA sink/source): Capable of driving moderate loads directly.
• Fast Propagation Delay (25 ns): Ideal for high-speed timing and pulse generation.
• No Schmitt Trigger Inputs: Simplifies external timing network design compared to Schmitt-based alternatives.
• Surface-Mount (SOIC-16): Compact footprint suitable for automated assembly.
• Industrial Compliance: EAR99, RoHS3, and REACH unaffected for global market suitability.

CD74HC123M Applications

• Pulse Width Modulation (PWM): Used in motor control and power supply timing circuits.
• Debouncing Circuits: Cleans noisy switch/button inputs in embedded systems.
• Time-Delay Generation: Precision delays in industrial automation and test equipment.
• Frequency Division: Converts clock signals into longer-duration pulses.
• Sequential Logic Systems: Synchronizes events in state machines and counters.

Conclusion of CD74HC123M

The CD74HC123M excels in high-speed, low-power timing applications, offering dual-channel flexibility, wide voltage compatibility, and robust industrial compliance. Its fast propagation delay and adjustable pulse width make it superior to basic monostables, while the absence of Schmitt inputs simplifies design. Ideal for embedded systems, industrial controls, and consumer electronics, this IC balances performance with cost-effectiveness. Texas Instruments’ reputation for reliability further solidifies its position as a go-to solution for precision timing needs.

CD74HC123M Documents

Download datasheets and manufacturer documentation for CD74HC123M

PCN Part Status Change :

Mult Dev Status Chg 25/Apr/2023      

Datasheets :

CD54,74HC(T)123,423       Logic Guide      

HTML Datasheet :

CD54,74HC(T)123,423       Logic Guide      

PCN Design/Specification :

Mult Devices Font 21/Apr/2018       Design 25/Feb/2022