74HCT123PW-Q100,11

Multivibrators Overview

The Nexperia 74HCT123PW-Q100,11 is a dual retriggerable monostable multivibrator with reset, housed in a 16-pin TSSOP package. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an ambient temperature range from -40 °C to +125 °C. The device features TTL input levels, Schmitt-trigger action on trigger inputs for noise immunity, and direct reset functionality. It includes built-in clamp diodes for overvoltage tolerance and meets AEC-Q100 Grade 1 automotive qualification standards.

Multivibrators Feature Summary

• Dual independent monostable circuits with retriggerable pulse extension capabilities
• Schmitt-trigger inputs provide high noise immunity and tolerance to slow signal transitions
• Direct reset input allows immediate termination of the output pulse at any time
• Automotive-grade qualification compliant with AEC-Q100 Grade 1 standards

Multivibrators Applications

• Timing delay generation in automotive electronic systems
• Pulse width modulation and waveform shaping
• Debouncing switches or contacts in control circuits
• Frequency division and timing sequence generation

Multivibrators Procurement Notes

Verify the complete part number including the suffix ',11' to confirm the specific TSSOP-16 packaging variant. Ensure the design accounts for the specified operating temperature range up to 125 °C and the required 4.5 V to 5.5 V supply voltage. Confirm that the application does not exceed the absolute maximum ratings for power dissipation and current clamping defined in the datasheet.

Multivibrators Selection Notes

Select this component when dual monostable functionality with automotive reliability is required. The HCT logic family ensures compatibility with standard TTL logic levels. Consider the TSSOP package dimensions if board space is constrained. Verify that external timing components can support the desired pulse widths within the recommended operating conditions.

Multivibrators Part Context

This device belongs to the Nexperia 74HCT123-Q100 series, which includes variants in SO16 and DHVQFN packages. The series is designed for high-speed CMOS applications requiring low power consumption and robust latch-up performance. It serves as a replacement for legacy monostable multivibrators in modern automotive and industrial designs.

Multivibrators Replacement Considerations

Compatible substitutes include the 74HC123PW-Q100,118 for HC logic level requirements and the 74HCT123D-Q100 for SOIC package alternatives. Verify pinout compatibility and electrical specifications before substitution.

Multivibrators FAQ

How is the output pulse width determined?

The basic output pulse width is programmed by selecting external resistor (REXT) and capacitor (CEXT) values connected to the respective pins.

Can the output pulse be extended after triggering?

Yes, the device is retriggerable. Applying another trigger pulse while the output is active extends the pulse width.

What is the function of the nRD input?

The nRD input provides a direct reset function. A LOW-going edge on this input terminates the output pulse immediately.