74HC123D,652

Overview

The Nexperia 74HC123D,652 is a dual retriggerable monostable multivibrator housed in a 16-lead SO plastic small outline package (SOT109-1). It operates within a supply voltage range of 2.0 V to 6.0 V and supports an ambient temperature range from -40 °C to +125 °C. The device features Schmitt-trigger action on inputs nA and nB for noise immunity. Output pulse width is programmed by external components REXT and CEXT. Propagation delay from trigger input to output is typically 30 ns at 4.5 V with a maximum of 51 ns.

Feature Summary

• Dual retriggerable monostable multivibrator architecture
• Schmitt-trigger action on edge-triggered inputs
• Direct reset capability to terminate output pulses
• CMOS low power dissipation design

Applications

• Timing generation circuits
• Pulse width modulation
• Frequency division
• Timer applications

Procurement Notes

Verify the specific ordering suffix matches the required package variant. Confirm RoHS compliance status against current manufacturing data sheets. Ensure the component meets the specified operating temperature range for the target application environment. Cross-reference pinout configurations with the official SOT109-1 package outline documentation.

Selection Notes

Select this component when dual independent monostable functions are required in a single package. Verify that the external timing resistor and capacitor values align with the desired pulse width specifications. Consider the propagation delay characteristics relative to system clock speeds. Ensure the supply voltage remains within the recommended operating conditions for stable performance.

Part Context

This part belongs to the 74HC logic family, utilizing CMOS technology for high noise immunity and low power consumption. It is functionally compatible with other 74HC series devices but specifically designed for monostable multivibrator applications requiring precise timing control and retriggering capabilities.

Replacement Considerations

The 74HCT123D,653 serves as a TTL-level compatible alternative within the same package. Other variants include the TSSOP16 package version 74HC123PW and the DHVQFN16 package version 74HC123BQ.