74VHC123AMX

Overview

The onsemi 74VHC123AMX is a dual monostable multivibrator integrated circuit belonging to the 74VHC123A logic series. It features Schmitt-trigger inputs for noise immunity and operates within a supply voltage range of 2 V to 5.5 V. The device provides two independent circuits in a 16-SOIC narrow surface-mount package. Key electrical parameters include a maximum power supply current of 4 uA, output currents of 8 mA high and -8 mA low, and propagation delays of 24.1 ns and 14 ns. It functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Dual monostable multivibrator configuration with independent timing circuits
• Schmitt-trigger inputs provide enhanced noise filtering capabilities
• CMOS technology ensures low static power consumption
• Wide operating voltage range supports diverse digital logic levels

Applications

• Pulse generation and shaping in digital signal processing
• Timing delay circuits for sequential logic control
• Debouncing switches in microcontroller input interfaces
• Frequency division and pulse width modulation applications

Procurement Notes

Verify component authenticity through authorized distribution channels due to potential counterfeit risks. Confirm RoHS compliance status as documentation indicates detailed requirements rather than standard certification. Check for process change notifications regarding packaging or material composition updates. Ensure storage conditions adhere to moisture sensitivity level 1 guidelines to maintain reliability before soldering.

Selection Notes

Select this component when dual independent monostable operation is required in a compact surface-mount footprint. The VHC series offers speed comparable to LVC while maintaining HC compatibility. Verify that the 2 V to 5.5 V supply range aligns with system power rails. Consider the 16-SOIC package dimensions for PCB layout constraints compared to TSSOP alternatives.

Part Context

This part belongs to the 74VHC123A family of dual monostable multivibrators manufactured by onsemi. It utilizes advanced CMOS technology to deliver high-speed performance with low power dissipation. The VHC series bridges the gap between traditional HC and modern LVC logic families, offering robust switching characteristics suitable for complex digital systems requiring precise timing control.

Replacement Considerations

Direct substitutes include SN74AHC123APWR from Texas Instruments and 74AHC123APW from Nexperia. These alternatives offer similar functional specifications and pinouts. Verify voltage tolerance and propagation delay differences when migrating designs. Package variations such as SOIC versus TSSOP may require PCB footprint adjustments during replacement.