DM74123N

Multivibrators Overview

The DM74123N is a dual retriggerable monostable multivibrator housed in a 16-lead Plastic Dual-In-Line Package (PDIP). It generates output pulses ranging from nanoseconds to long durations with up to 100% duty cycle capability. The device features three inputs per channel, allowing selection of leading-edge or trailing-edge triggering via active-LOW transition on Pin A or active-HIGH transition on Pin B. An active-LOW Clear input terminates the pulse and inhibits triggering. Pulse width is determined by external resistor and capacitor values.

Multivibrators Feature Summary

• Dual retriggerable monostable multivibrator architecture
• Supports both active-LOW and active-HIGH transition triggering
• Direct reset functionality via Clear input
• Compatible with DTL and TTL logic families

Multivibrators Applications

• Timing circuits requiring precise pulse generation
• Debouncing switches for digital systems
• Pulse width modulation applications
• Frequency division circuits

Multivibrators Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm package integrity upon receipt, as the PDIP housing is susceptible to mechanical stress during handling. Ensure storage conditions align with manufacturer specifications to prevent moisture damage. Cross-reference ordering codes against official datasheets to validate part revision levels before integration into production workflows.

Multivibrators Selection Notes

Select this component when dual independent one-shot timing functions are required within a single integrated circuit. The device supports variable pulse widths defined by external RC networks, offering design flexibility. Consider its compatibility with standard TTL logic levels and its ability to handle retriggering for continuous high-state outputs. Evaluate thermal management requirements based on the specified operating temperature range.

Multivibrators Part Context

Originally manufactured by Fairchild Semiconductor, this component belongs to the standard 74-series logic family. It serves as a fundamental building block for sequential logic designs requiring reliable pulse generation. The device has been widely adopted in industrial and commercial electronics for its robust performance and straightforward interface requirements.

Multivibrators Replacement Considerations

SN74123N from Texas Instruments is a direct functional substitute. Verify pinout compatibility and electrical characteristics match system requirements before substitution.

Multivibrators FAQ

How is the output pulse width determined?

The pulse width is determined by the values of an external resistor and capacitor connected to the device.

Can the device be retriggered while a pulse is active?

Yes, the device is retriggerable, allowing the output pulse to be extended by applying new trigger signals.