74HC123D,653

Overview

The Nexperia 74HC123D,653 is a dual retriggerable monostable multivibrator housed in an SO16 (SOT109-1) package. It operates within a supply voltage range of 2.0 V to 6.0 V and supports ambient temperatures from -40 °C to +125 °C. The device features Schmitt-trigger inputs for noise immunity and includes clamp diodes for interfacing with voltages exceeding VCC. Propagation delays vary by voltage: at 2.0 V, delays reach up to 255 ns; at 4.5 V, they are approximately 51 ns; and at 6.0 V, they drop to 43 ns.

Feature Summary

• Dual retriggerable monostable multivibrator architecture
• Schmitt-trigger action on trigger inputs for slow signal tolerance
• Direct reset capability to terminate output pulses immediately
• Input clamp diodes allowing interface to voltages above VCC

Applications

• Timing pulse generation
• Frequency division
• Waveform shaping

Procurement Notes

Verify the specific ordering suffix matches the required package variant. Confirm that the component meets RoHS3 compliance standards as specified in the product data sheet. Ensure the selected part number aligns with the intended operating temperature range and voltage requirements for the target application design.

Selection Notes

Select this component when a dual-channel monostable solution with Schmitt-trigger inputs is required. The HC series offers wide voltage flexibility compared to HCT variants. Verify external timing component compatibility with the desired pulse width calculations. Consider the SO16 package dimensions for PCB layout constraints.

Part Context

This device belongs to the Nexperia 74HC logic family, designed for CMOS applications requiring low power dissipation and high noise immunity. It is functionally compatible with other standard 74HC monostable multivibrators, though pin configurations and electrical characteristics should be verified against specific datasheets before substitution.

Replacement Considerations

Check for equivalent parts from other manufacturers offering the same SO16 package and dual monostable functionality. Verify that any substitute maintains the 2.0 V to 6.0 V operating range and Schmitt-trigger input specifications.