74HCT123D,653

Overview

The Nexperia 74HCT123D,653 is a dual retriggerable monostable multivibrator with reset housed in a 16-lead SO plastic small outline package (SOT109-1). 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 Schmitt-trigger action on inputs nA and nB for noise immunity and includes direct reset functionality. Propagation delay typically reaches 30 ns at 4.5 V.

Feature Summary

• Dual retriggerable monostable multivibrator architecture
• Schmitt-trigger action on trigger inputs for improved noise tolerance
• Direct reset capability to terminate output pulses immediately
• CMOS low power dissipation characteristics

Applications

• Timing pulse generation
• Frequency division circuits
• Waveform shaping applications

Procurement Notes

Verify the specific ordering suffix matches the required package variant. Confirm that the HCT logic level compatibility aligns with the target system's TTL input requirements. Ensure the operating temperature range meets the environmental specifications of the intended deployment scenario before finalizing procurement.

Selection Notes

Select this component when dual independent timing channels are required within a single integrated circuit. The HCT series ensures compatibility with standard TTL logic levels while maintaining CMOS power efficiency. Verify that external timing components can support the desired pulse width calculations based on the specified resistor and capacitor ranges.

Part Context

This part belongs to the Nexperia 74HCT123 family of dual monostable multivibrators. It shares functional similarities with the 74HC123 but utilizes HCT logic levels for broader interface compatibility. The D suffix indicates the SO16 surface-mount package configuration, distinguishing it from TSSOP or QFN variants.

Replacement Considerations

Nexperia 74HCT123PW,118