74HC123BQ-Q100,115

Overview

The Nexperia 74HC123BQ-Q100 is a dual retriggerable monostable multivibrator with reset, qualified to AEC-Q100 Grade 1 for automotive use. It operates within a supply voltage range of 2.0 V to 6.0 V and supports an ambient temperature range from -40 °C to +125 °C. The device features Schmitt-trigger inputs for noise immunity and includes clamp diodes for high-voltage interfacing. It utilizes external components (REXT and CEXT) to program output pulse widths, which can be extended via retriggering or terminated by a direct reset input.

Feature Summary

• Automotive qualification in accordance with AEC-Q100 Grade 1 standards
• Dual retriggerable functionality allowing pulse extension up to 100% duty factor
• Schmitt-trigger action on trigger inputs for tolerance to slow rise/fall times
• DHVQFN package with side-wettable flanks enabling automatic optical inspection

Applications

• Automotive electronic systems requiring robust timing control
• Pulse width generation and timing delay circuits
• Frequency division applications
• Waveform shaping and conversion

Procurement Notes

Verify the specific ordering code matches the DHVQFN-16 package configuration. Confirm that the Q100 suffix indicates AEC-Q100 Grade 1 qualification suitable for automotive environments. Ensure design specifications align with the recommended operating conditions provided in the official datasheet before finalizing procurement.

Selection Notes

Select this component when automotive reliability and wide temperature operation are required. The HC logic family offers CMOS low power dissipation and high noise immunity compared to older technologies. Verify that the DHVQFN package dimensions fit the PCB layout constraints and that the thermal performance meets the application's power dissipation requirements.

Part Context

This part belongs to the Nexperia 74HC123-Q100 series, which also includes variants like the 74HCT123-Q100. While sharing identical functional descriptions and automotive qualifications, the HCT variant specifies TTL-level input compatibility. The BQ suffix specifically denotes the DHVQFN16 package type, distinguishing it from SO16 or TSSOP16 alternatives.

Replacement Considerations

Direct pin-compatible substitutes include other packages within the same series, such as the 74HC123D-Q100 (SO16) or 74HC123PW-Q100 (TSSOP16). These share identical electrical characteristics and automotive qualification but differ only in physical package dimensions.