74HCT423PW,118

Overview

The 74HCT423PW,118 is a dual retriggerable monostable multivibrator manufactured by Nexperia. It operates within a supply voltage range of 4.5 V to 5.5 V and features Schmitt-trigger inputs for noise immunity. The device generates output pulses controlled by external resistor (REXT) and capacitor (CEXT) components. It includes active LOW direct reset functionality and supports pulse extension via retriggering on gated edge inputs.

Feature Summary

• Dual retriggerable monostable multivibrator architecture with independent timing control
• Schmitt-trigger action on trigger inputs to tolerate slow rise and fall times
• Direct reset input capability to terminate output pulses immediately
• ESD protection exceeding specified Human Body Model and Machine Model thresholds

Applications

• Pulse width generation and shaping in digital circuits
• Timing delay circuits requiring adjustable duration
• Debouncing switches or contacts in control systems
• Frequency division and pulse stretching applications

Procurement Notes

Verify the component designation against official Nexperia documentation to confirm the HCT logic family compatibility and TSSOP-16 package configuration. Ensure that the ordering suffix matches the required temperature range and packaging specifications. Cross-reference the datasheet revision history to validate current manufacturing status and any potential pinout or electrical characteristic updates prior to finalizing procurement orders.

Selection Notes

Select this component when a dual-channel monostable solution with retriggerable capabilities is required. The HCT series ensures compatibility with standard TTL logic levels while maintaining CMOS power efficiency. Consider the external timing component constraints and the specific propagation delay characteristics relative to the system clock speed. Verify that the operating temperature range meets the environmental requirements of the target application design.

Part Context

This part belongs to the 74HCT423 series of high-speed Si-gate CMOS devices. It is pin-compatible with Low Power Schottky TTL standards. The device is functionally similar to the 74HC123 but lacks triggering via the reset input. It complies with JEDEC standard no. 7A and is designed for robust performance in industrial and commercial environments.

Replacement Considerations

The 74HCT423PW,118 is functionally identical to the 74HCT123 except for the reset input triggering method. Direct substitutes include other 74HCT423 variants from Nexperia in different packages such as SO16 or SSOP16. Verify pinout compatibility and electrical specifications before substituting with generic equivalents.