74HC123BQ

The 74HC123BQ is a dual retriggerable monostable multivibrator (one-shot) from the 74HC series, designed for high-speed CMOS applications. It features two independent monostable circuits, each capable of generating precise output pulses with durations set by external resistors and capacitors.
Key features:
- Retriggerable operation: Allows pulse extension by retriggering during the active state.
- Wide pulse control: Adjustable pulse width via R (resistor) and C (capacitor).
- Low power consumption: Typical of HC-series CMOS logic.
- High noise immunity: Robust against signal interference.
- Operating voltage: 2V to 6V, compatible with TTL levels.
Applications include pulse stretching, debouncing switches, and timing circuits. The BQ suffix indicates a DHVQFN package, suitable for space-constrained designs.
For precise timing, refer to the datasheet for R and C calculations.

The 74HC123BQ (dual retriggerable monostable multivibrator) has several equivalents:
- CD74HC123E (DIP package)
- SN74HC123N (DIP, Texas Instruments)
- MC74HC123AN (DIP, ON Semiconductor)
- 74HCT123 (HCT variant, compatible with TTL levels)
These offer similar functionality but may differ in package, manufacturer, or minor specs. Verify pinout and electrical characteristics for exact replacement.

The 74HC123BQ is a dual retriggerable monostable multivibrator (one-shot) from the 74HC family, featuring:
- Dual Channels: Two independent monostable circuits in one package.
- Retriggerable Operation: Allows extending output pulse duration by retriggering.
- Wide Operating Voltage: 2V to 6V (HC-compatible).
- Adjustable Pulse Width: Set via external R (resistor) and C (capacitor).
- Schmitt-Trigger Inputs: Noise immunity on A (active-low) and B (active-high) inputs.
- Direct Clear Input: Immediate pulse termination via \CLR (active-low).
- Low Power Consumption: CMOS technology.
- High-Speed Operation: Typical propagation delay of ~20ns at 5V.
- Package: DHVQFN16 (3.5mm x 3.5mm), suitable for space-constrained designs.
Ideal for timing, pulse generation, and debouncing in digital systems.

The 74HC123BQ is manufactured by Nexperia, a leading semiconductor company specializing in high-performance discrete, logic, and MOSFET devices. Nexperia was originally a division of NXP Semiconductors before becoming an independent company in 2017.
Nexperia is known for its reliable, high-quality components, particularly in automotive, industrial, and consumer electronics. The 74HC123BQ is a dual retriggerable monostable multivibrator (part of their logic IC portfolio), widely used in timing and pulse generation applications.
Headquartered in the Netherlands, Nexperia operates globally with a strong focus on efficiency and innovation in semiconductor manufacturing.