74AHC123AD,112

Overview

The Nexperia 74AHC123AD,112 is a dual retriggerable monostable multivibrator with reset in an SO16 package. It operates on a supply voltage range of 2.0 V to 5.5 V and supports DC triggering from active HIGH or LOW inputs. The device features overvoltage tolerant inputs up to 5.5 V, Schmitt-trigger action for high noise immunity, and direct reset functionality. Propagation delay ranges from 1.0 ns to 26.0 ns depending on load capacitance and voltage. It includes ESD protection exceeding 2000 V (HBM) and 1000 V (CDM), with latch-up performance exceeding 100 mA.

Feature Summary

• Dual retriggerable monostable multivibrator architecture
• Overvoltage tolerant inputs compatible with mixed voltage environments
• Schmitt-trigger action at all inputs for improved noise immunity
• Direct reset input terminates output pulse immediately

Applications

• Pulse width generation and timing circuits
• Frequency division and pulse stretching applications
• Debouncing switches and touch-sensitive interfaces
• Timing delays and one-shot pulse generation

Procurement Notes

Verify the specific ordering suffix '112' against current Nexperia documentation to confirm packaging details and availability status. Confirm RoHS compliance and REACH registration requirements prior to procurement. Ensure design compatibility with the specified SO16 package dimensions and thermal characteristics.

Selection Notes

Select this component when dual independent monostable circuits are required within a single package. The AHC series offers CMOS logic levels suitable for general-purpose digital systems. Verify that the external REXT and CEXT components selected can support the desired pulse width calculations across the full operating temperature range.

Part Context

This part belongs to the Nexperia 74AHC123A family of dual retriggerable monostable multivibrators. It shares functional similarities with the 74AHCT123A variant but utilizes CMOS input levels rather than TTL-compatible thresholds. The AD suffix indicates the SO16 plastic small outline package configuration.

Replacement Considerations

• 74AHCT123AD,118

FAQ

How is the output pulse width determined?

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

Can the output pulse be extended after triggering?

Yes, the device is retriggerable. The output pulse period can be extended indefinitely by retriggering either of the edge-triggered inputs before the initial pulse expires.