74AHCT123ABQ,115

Overview

The Nexperia 74AHCT123ABQ,115 is a dual retriggerable monostable multivibrator with reset. 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-compatible input levels and includes Schmitt-trigger action on all inputs for high noise immunity. It provides active HIGH (nQ) and active LOW (nQ) outputs. The basic output pulse width is programmed by external components REXT and CEXT, allowing for pulse extension via retriggering or immediate termination via the direct reset input nRD.

Feature Summary

• Dual retriggerable monostable multivibrator architecture with independent timing circuits
• TTL-compatible input logic levels with Schmitt-trigger action for enhanced noise immunity
• Overvoltage tolerant inputs enabling operation in mixed-voltage environments
• Direct reset functionality allows immediate termination of output pulses

Applications

• Timing delay generation
• Pulse width modulation
• Frequency division
• Waveform shaping

Procurement Notes

Verify the specific ordering suffix 'BQ' corresponds to the DHVQFN16 package (SOT763-1). Confirm that the '115' suffix indicates the standard tape and reel packaging format. Ensure compatibility with the required operating temperature range of -40 °C to +125 °C for the intended application environment.

Selection Notes

Select this component when TTL-level triggering is required alongside wide supply voltage tolerance. The AHCT series ensures compatibility with standard TTL logic families while maintaining CMOS performance characteristics. Verify that the external resistor and capacitor values selected align with the desired pulse width specifications under the target supply voltage conditions.

Part Context

This part belongs to the Nexperia 74AHC(AHCT)123A family of dual retriggerable monostable multivibrators. It shares functional similarities with other members of the series but differs in package type and electrical characteristics defined by the AHC versus AHCT logic standards. The BQ suffix specifically denotes the DHVQFN16 package variant.

Replacement Considerations

Check for pin-compatible alternatives within the same 74AHC(AHCT)123 family. Verify if other manufacturers offer equivalent dual monostable multivibrators with matching TTL input thresholds and DHVQFN16 packaging.