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The 74HC123 is a dual retriggerable monostable multivibrator (one-shot) manufactured by Toshiba (TOS). Below are its specifications, descriptions, and features:

Specifications:

• Supply Voltage (VCC): 2V to 6V
• Input Voltage (VI): 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay (Typical): 35 ns (at VCC = 4.5V)
• Output Current (IO): ±25 mA
• Power Dissipation (PD): 500 mW
• Package Options: DIP-16, SOP-16, TSSOP-16

Descriptions:

• The 74HC123 is a high-speed CMOS logic IC containing two independent retriggerable monostable multivibrators.
• Each multivibrator can be triggered by either a rising or falling edge on the input.
• The output pulse width is determined by an external resistor (R) and capacitor (C).
• Features retriggerable functionality, allowing the output pulse to be extended by reapplying a trigger before the initial pulse ends.
• Includes direct clear (CD) inputs for immediate termination of the output pulse.

Features:

• Wide Operating Voltage Range: 2V to 6V
• Retriggerable Operation: Allows pulse extension with new trigger inputs
• Edge-Triggered Inputs: Works on both rising and falling edges
• Adjustable Pulse Width: Set via external RC components
• Low Power Consumption: CMOS technology ensures minimal power usage
• High Noise Immunity: Robust against electrical interference
• ESD Protection: HBM ≥ 2000V

This IC is commonly used in timing applications, pulse generation, and debouncing circuits.

*(Note: Always refer to the official Toshiba datasheet for exact specifications and application details.)*