SN74LS123 Dual Retriggerable Monostable Multivibrator – TI, DIP-16

SN74LS123 Dual Retriggerable Monostable Multivibrator IC from Texas Instruments

The SN74LS123 is a dual retriggerable monostable multivibrator integrated circuit from Texas Instruments, designed to offer precision pulse generation and timing control in TTL-compatible digital systems. This IC incorporates independent trigger and clear inputs, making it suitable for wide-ranging timing, delay, and pulse-stretching applications. With a voltage range centered around 5V, it delivers dependable logic operation in both legacy and modern systems.

Engineers value the SN74LS123 for its retriggerable functionality, allowing pulse extensions on successive trigger signals, which is essential in noisy environments and timing-critical applications. When sourced through IC Manufacturer, users gain confidence in authentic components with professional support, verified supply chains, and datasheet access for technical clarity.

Technical Specifications and Performance Data

Advantages Over Conventional Timer ICs

• Retriggerable Output: Unlike one-shot timers, this IC allows pulse extension during high noise or jitter, ensuring accurate signal timing.
• Independent Channels: Dual channels operate separately, enabling simultaneous timing functions within a compact form factor.
• TTL Compatibility: Seamless integration with 74 series logic, minimizing the need for level shifting or interface circuitry.
• Flexible Pulse Control: RC timing components offer precise control of pulse width, adaptable to diverse timing needs.
• Industrial Reliability: DIP-16 through-hole packaging enables robust connections in high-vibration or maintenance-intensive environments.

Technical Parameters Summary

Use Cases and Application Scenarios

• Pulse stretcher in data acquisition systems
• Timing delay for edge detection circuits
• Watchdog timers in industrial controllers
• Sequencing control in relay logic systems
• Noise-filtered event triggering in automotive ECUs

Frequently Asked Questions (FAQ)

What is the main application of the SN74LS123?

This IC is primarily used for timing pulse generation, particularly where retriggerable and precise pulse widths are required such as in digital delay or trigger systems.

Can this IC work with other TTL logic devices?

Yes, the SN74LS123 is TTL compatible and integrates seamlessly with other 74-series logic families, ensuring efficient signal propagation without level translation.

How do I configure the output pulse duration?

The pulse width is set externally by selecting suitable resistor and capacitor values. This allows users to tailor the timing characteristics to their application’s requirements.

Does retriggerable mode improve performance in noisy environments?

Absolutely. Retriggerability ensures that if a new trigger pulse arrives before the current pulse ends, the output duration extends, providing stable operation in jittery conditions.

Is the DIP-16 package suitable for prototyping?

Yes, the dual in-line package format makes this IC ideal for breadboard testing and through-hole assembly, often used in early design validation and repair applications.