74LV123D/AUJ

Overview

The Nexperia 74LV123D is a dual retriggerable monostable multivibrator with reset, housed in an SO-16 (SOT109-1) package. It operates within a supply voltage range of 1.0 V to 5.5 V and supports temperatures from -40 °C to +125 °C. Propagation delays vary by voltage: 18 ns typical at 4.5 V–5.5 V, 25 ns at 3.0 V–3.6 V, 30 ns at 2.7 V, and 40 ns at 2.0 V. Pulse widths are programmable via external REXT and CEXT components.

Feature Summary

• Dual channels with independent edge-triggered inputs for pulse generation
• Retriggerable functionality allows extension of output pulses up to 100% duty factor
• Direct reset input terminates active output pulses immediately
• Schmitt-trigger action on trigger inputs ensures tolerance to slow rise and fall times

Applications

• Pulse width modulation and timing circuits
• Debouncing switches or mechanical contacts
• Frequency division and pulse stretching applications

Procurement Notes

Verify the specific ordering suffix matches the required package variant. Confirm temperature grade requirements against the datasheet specifications. Ensure external component values align with recommended operating conditions. Check for any recent product change notices affecting pinout or electrical characteristics.

Selection Notes

Select this component when dual independent monostable functions are required in a single package. The LV series offers low power consumption suitable for battery-operated devices. Verify that the external resistor and capacitor values can achieve the desired pulse width within the specified voltage range.

Part Context

This device belongs to the Nexperia 74LV logic family, designed for low-voltage CMOS applications. It provides compatibility with standard logic interfaces while optimizing power dissipation. The dual configuration reduces board space compared to using two separate single-channel devices.

Replacement Considerations

Check for direct replacements such as the 74LV123PW (TSSOP-16) or 74LV123BQ (DHVQFN-16) if different packaging is needed. Ensure functional equivalence regarding retriggering and reset capabilities.