74HC123D,653

The 74HC123D,653 is a dual retriggerable monostable multivibrator (also known as a one-shot) integrated circuit (IC) manufactured by Nexperia. This device is part of the 74HC series, which consists of high-speed CMOS logic components designed for general-purpose digital applications.

Key Features:

• Dual Monostable Multivibrator: The 74HC123D,653 contains two independent monostable multivibrators, each capable of generating a pulse output in response to a trigger input.
• Retriggerable Operation: It supports retriggerable operation, allowing the output pulse width to be extended if additional trigger pulses are received during the monostable period.
• Adjustable Pulse Width: The duration of the output pulse is determined by an external resistor (Rext) and capacitor (Cext) connected to the timing control pins (t1, t2). By selecting appropriate values for Rext and Cext, users can adjust the pulse width according to their application requirements.
• Schmitt-Trigger Inputs: The trigger inputs (A1, A2) feature Schmitt-trigger action, ensuring robust triggering with hysteresis and improved noise immunity.
• Wide Operating Voltage Range: The IC operates over a wide voltage range from 2 V to 6 V, making it compatible with both 3.3 V and 5 V logic systems.
• High-Speed Operation: With its HC (high-speed CMOS) technology, the IC offers fast propagation delays and switching speeds, suitable for high-frequency digital circuits.
• Low Power Consumption: It features low quiescent current consumption, enabling energy-efficient operation in battery-powered and low-power applications.
• Pb-Free and RoHS Compliant: The 74HC123D,653 is manufactured using lead-free materials and is compliant with the Restriction of Hazardous Substances (RoHS) directive, ensuring environmental sustainability.

Applications:

• Pulse generation and width modulation
• Precision timing and delay circuits
• Frequency division and clock synchronization
• Pulse stretching and debouncing
• Reset and watchdog timer circuits
• Digital communication systems
• Industrial automation and control systems
• Test and measurement equipment