74AHC123ABQ,115

Overview

The Nexperia 74AHC123ABQ,115 is a dual retriggerable monostable multivibrator with reset housed in a DHVQFN16 package (SOT763-1). It operates within a supply voltage range of 2.0 V to 5.5 V and supports an ambient temperature range from -40 °C to +125 °C. The device features overvoltage tolerant inputs up to 5.5 V and Schmitt-trigger action for high noise immunity. Propagation delays vary by load capacitance; at 50 pF, delays range from approximately 11.4 ns to 17.5 ns depending on the specific input path.

Feature Summary

• Dual retriggerable monostable multivibrator architecture allowing pulse extension via edge-triggered inputs
• Overvoltage tolerant inputs enabling use as translators in mixed voltage environments
• Direct reset functionality to terminate output pulses immediately
• Schmitt-trigger action on all inputs providing high noise immunity

Applications

• Timing delay generation circuits
• Pulse width modulation applications
• Debouncing switches or contacts
• Frequency division circuits

Procurement Notes

Verify the ordering suffix '115' corresponds to the DHVQFN16 package configuration. Confirm that the AHC logic family meets the required speed and voltage specifications compared to AHCT variants. Ensure the thermal pad requirements for the SOT763-1 package are addressed in the PCB layout design.

Selection Notes

Select this component when dual independent monostable circuits are required in a compact footprint. The AHC series offers faster switching speeds than standard HC devices. Verify that the external timing components (REXT and CEXT) can achieve the desired pulse widths within the specified operating temperature range.

Part Context

This part belongs to the 74AHC123A/74AHCT123A family of dual retriggerable monostable multivibrators. The ABQ variant specifically denotes the DHVQFN16 package type, distinguishing it from SO16 or TSSOP16 options. It shares functional compatibility with other members of the 74AHC logic family while offering enhanced packaging density.

Replacement Considerations

Check for 74AHC123AD,118 (SO16) or 74AHC123APW,118 (TSSOP16) if package changes are acceptable. Verify pinout compatibility before substituting with other manufacturers' equivalents.