74AHC123AD,118

Overview

The Nexperia 74AHC123AD,118 is a dual retriggerable monostable multivibrator with reset housed in a 16-lead SO plastic small outline package (SOT109-1). It operates within a supply voltage range of 2.0 V to 5.5 V and supports an ambient temperature range from -40 °C to +125 °C. The device features overvoltage tolerant inputs up to 5.5 V, allowing use as translators in mixed-voltage environments. Pulse width is programmed via external components REXT and CEXT, while direct reset terminates output pulses.

Feature Summary

• Dual retriggerable monostable multivibrator architecture
• Overvoltage tolerant inputs for mixed-voltage translation
• Direct reset functionality to terminate output pulses
• Schmitt-trigger action on all inputs for high noise immunity

Applications

• Timing pulse generation
• Debouncing switches
• Frequency division
• Pulse widening

Procurement Notes

Verify the specific ordering suffix

Selection Notes

Select this component when a dual-channel monostable solution is required with CMOS input levels and wide supply voltage flexibility. Ensure external timing components are sized correctly for the desired pulse duration. Verify that the SO16 package dimensions fit the target PCB layout constraints.

Part Context

This part belongs to the 74AHC series of high-speed CMOS logic devices manufactured by Nexperia. It is functionally compatible with other 74AHC family members but specifically designed for monostable multivibrator applications requiring precise timing control and retriggering capabilities.

Replacement Considerations

Check for pin-compatible alternatives such as the 74AHCT123AD variant if TTL input levels are preferred instead of CMOS levels. Ensure any substitute maintains the same SO16 package and operating temperature range.