74HC423D-Q100J

Overview

The Nexperia 74HC423D-Q100J is a dual retriggerable monostable multivibrator with reset, qualified to AEC-Q100 Grade 1. It operates within a supply voltage range of 2.0 V to 6.0 V and supports ambient temperatures from -40 °C to +125 °C. The device features Schmitt-trigger action on trigger inputs for noise immunity and includes clamp diodes for overvoltage tolerance. Pulse width is controlled by external resistor (REXT) and capacitor (CEXT), allowing extension via retriggering. Propagation delay ranges from 19 ns to 77 ns depending on voltage. It is housed in an SO16 plastic small outline package.

Feature Summary

• Dual retriggerable monostable multivibrator architecture with direct reset functionality
• Schmitt-trigger action on trigger inputs ensures high noise immunity against slow signal transitions
• Automotive qualification compliant with AEC-Q100 Grade 1 standards
• Wide supply voltage operation from 2.0 V to 6.0 V with CMOS low power dissipation

Applications

• Automotive electronic systems requiring robust timing control
• Pulse generation circuits utilizing external RC timing components
• Timing extensions where output pulse duration must be prolonged via retriggering

Procurement Notes

Verify the specific ordering suffix 'J' against the manufacturer's current datasheet to confirm packaging details and compliance status. Ensure the selected component matches the required temperature grade and package variant for your design. Confirm availability through authorized distributors as stock levels fluctuate. Cross-reference the part number with official Nexperia documentation to validate all electrical specifications before finalizing procurement.

Selection Notes

Select this component when a dual-channel monostable multivibrator with automotive reliability is required. The device supports both positive and negative edge triggering via separate inputs. Consider the external timing requirements for REXT and CEXT values to achieve desired pulse widths. Verify that the operating voltage and temperature range align with system constraints. The Schmitt-trigger inputs are suitable for noisy environments or signals with slow rise times.

Part Context

This device belongs to the Nexperia 74HC423-Q100 series of logic ICs. It is part of the broader 74HC family designed for high-speed CMOS applications. The Q100 designation indicates automotive-grade qualification. The D package refers to the SO16 surface-mount form factor. This series provides versatile timing solutions for digital logic applications requiring precise pulse generation and control.

Replacement Considerations

The 74HC123 is functionally similar but lacks the specific retriggering capabilities defined for the 74HC423. Verify pin compatibility and electrical characteristics before substitution. Ensure any replacement meets the same AEC-Q100 Grade 1 requirements if used in automotive contexts.