74HCT423PW,112

Overview

The 74HCT423PW,112 is a dual retriggerable monostable multivibrator with reset, manufactured by NXP USA Inc. It operates within a supply voltage range of 4.5 V to 5.5 V and features Schmitt-trigger action on all inputs except the reset input. The device supports DC triggering from active HIGH or active LOW inputs and allows for pulse width extension via retriggering up to a 100% duty factor. It complies with JEDEC standard no. 7A and includes ESD protection exceeding 2000 V (HBM) and 200 V (MM). The component is specified for operation from -40 °C to +125 °C and utilizes a TSSOP16 package.

Feature Summary

• Dual retriggerable monostable multivibrator with reset functionality
• Schmitt-trigger action on trigger inputs for noise tolerance
• DC triggered from active HIGH or active LOW inputs
• Direct reset terminates output pulse immediately

Applications

• Pulse generation circuits requiring variable duration control
• Timing applications utilizing external resistor and capacitor networks
• Systems requiring direct termination of output pulses via reset signal

Procurement Notes

Verify the specific ordering suffix against current NXP documentation to confirm package type and temperature range specifications. Ensure compatibility with system voltage requirements, as this HCT variant requires a minimum supply voltage of 4.5 V. Confirm that the TSSOP16 package dimensions align with the target PCB footprint design constraints.

Selection Notes

Select this component when a dual monostable configuration with Schmitt-triggered inputs is required for noisy environments. It serves as an alternative to the 74HC423 when TTL-compatible input levels are necessary. Consider the external timing components for pulse width determination and verify power-up behavior if immediate stable output is critical upon initialization.

Part Context

This device belongs to the 74HCT series of high-speed Si-gate CMOS logic devices. It is pin compatible with Low Power Schottky TTL (LSTTL) standards. The 74HCT423 is functionally identical to the 74HC123, with the distinction that it cannot be triggered via the reset input. It is designed for compliance with JEDEC standard no. 7A.

Replacement Considerations

Public confirmed substitute part numbers include 74HC423PW,112.