M74HC123RM13TR

Multivibrators Overview

The M74HC123RM13TR is a dual retriggerable monostable multivibrator manufactured by STMicroelectronics. It operates within a supply voltage range of 2V to 6V and features Schmitt-trigger inputs for noise immunity. The device provides both active high (Q) and active low (/Q) outputs. It utilizes external resistor and capacitor components to set the output pulse width, which can range from 120ns to 60s at 4.5V. Propagation delay is typically 23ns at 6V, with quiescent current limited to 4μA maximum in standby.

Multivibrators Feature Summary

• Dual retriggerable monostable multivibrator architecture
• Schmitt-trigger inputs for slow signal processing
• Simultaneous active high and active low outputs

Multivibrators Applications

• Pulse generation circuits
• Timing delays
• Frequency division
• Waveform shaping

Multivibrators Procurement Notes

Verify the specific package type against the ordering code suffix. Confirm that the required operating temperature range aligns with the -55°C to 125°C specification. Ensure external component values for Rx and Cx are selected according to the datasheet limits to maintain accurate timing performance.

Multivibrators Selection Notes

Select this component when dual independent monostable circuits are required in a single package. Verify compatibility with the target logic family voltage levels. Consider the wide output pulse width capability if precise timing control via external RC networks is necessary for the application design.

Multivibrators Part Context

This part belongs to the M74HC123 series of high-speed CMOS monostable multivibrators. It is functionally compatible with the 74LS123 series while offering lower power dissipation. The RM13TR suffix indicates it is packaged in a 16-pin SOIC format and supplied in tape and reel packaging for automated assembly.

Multivibrators Replacement Considerations

M74HC123B1R

Multivibrators FAQ

How does the retriggering feature affect the output pulse width?

If a trigger pulse occurs during the existing monostable period, the output pulse width is extended from the moment of the new trigger.

What is the function of the CLR input?

Applying a low signal to the CLR input resets the internal flip-flop, forcing the output to its inactive state regardless of the trigger inputs.