74HCT123N,652

Multivibrators Overview

The NXP USA Inc. 74HCT123N,652 is a dual retriggerable monostable multivibrator housed in a 16-lead PDIP package (SOT38-4). It operates within a supply voltage range of 4.5 V to 5.5 V and supports an ambient temperature range from -40 °C to +125 °C. The device features Schmitt-trigger inputs for noise tolerance and allows pulse width control via external resistor and capacitor connections. It provides both active HIGH and active LOW outputs with direct reset functionality.

Multivibrators Feature Summary

• Dual retriggerable monostable multivibrator architecture
• Schmitt-trigger action on trigger inputs for slow signal handling
• Direct reset input capability to terminate output pulses
• Pin compatible with Low-power Schottky TTL (LSTTL)

Multivibrators Applications

• Timing generation circuits
• Pulse width modulation
• Frequency division
• Waveform shaping

Multivibrators Procurement Notes

Verify the specific ordering suffix matches the required package type and temperature rating. Confirm RoHS compliance status as per the latest manufacturer documentation. Ensure the component source is authorized to avoid counterfeit risks. Check for any recent product change notices that may affect specifications or availability.

Multivibrators Selection Notes

Select this component when dual independent monostable circuits are required in a single package. The HCT logic family ensures compatibility with standard TTL levels while offering CMOS power advantages. Consider the external timing components' values and tolerances as they directly determine the output pulse duration and stability.

Multivibrators Part Context

This part belongs to the 74HCT series of high-speed Si-gate CMOS devices. It is functionally identical to the 74HC123 but optimized for 5 V operation with TTL-compatible input thresholds. The 'N' suffix denotes the plastic dual in-line package, distinguishing it from surface-mount variants like the SO or SSOP packages.

Multivibrators Replacement Considerations

The 74HC123N,652 is electrically equivalent but requires attention to input voltage levels due to HC vs HCT threshold differences. Other manufacturers' 74HCT123 equivalents may be pin-compatible but require verification of dynamic characteristics and operating conditions.