Overview
The 74HCT123D-Q100 is a dual retriggerable monostable multivibrator with reset, manufactured by Nexperia USA Inc. This integrated circuit is part of the 74HCT family and is designed to operate with TTL (Transistor-Transistor Logic) input levels. The device is highly versatile, allowing the output pulse width to be programmed using external components such as resistors and capacitors. It features high noise immunity, low power dissipation, and robust ESD protection, making it suitable for a wide range of applications, including automotive, industrial, and consumer electronics.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VCC | 4.5 - 5.5 | V |
| Logic Switching Levels | TTL | |
| Output Drive Capability | ± 4 | mA |
| Propagation Delay (tpd) | 26 | ns |
| Power Dissipation | Low | |
| Ambient Temperature (Tamb) | -40 to +125 | °C |
| Package | SO16 (SOT109-1) |
Key Features
- Dual retriggerable monostable multivibrator with reset
- Output pulse width controlled by external resistor and capacitor
- DC triggered from active HIGH or active LOW inputs
- Retriggerable for very long pulses up to 100% duty factor
- Direct reset terminates output pulse
- Schmitt-trigger action on all inputs except for the reset input
- High noise immunity and low power dissipation
- ESD protection: HBM exceeds 2000 V, CDM exceeds 1000 V
- Complies with JEDEC standards and AEC-Q100 (Grade 1) for automotive applications
Applications
The 74HCT123D-Q100 is suitable for various applications across different industries, including:
- Automotive systems: Qualified to AEC-Q100 (Grade 1), making it reliable for automotive electronics.
- Industrial control systems: High noise immunity and robust ESD protection make it ideal for harsh environments.
- Consumer electronics: Used in devices requiring precise timing and pulse generation.
- Mobile and wearable devices: Low power dissipation is beneficial for battery-powered devices.
Q & A
- What is the 74HCT123D-Q100? The 74HCT123D-Q100 is a dual retriggerable monostable multivibrator with reset, designed for TTL input levels.
- How is the output pulse width controlled? The output pulse width is controlled by the selection of external components such as resistors and capacitors.
- What are the input triggering options? The device can be triggered from active HIGH or active LOW inputs.
- Can the output pulse be extended? Yes, the output pulse can be extended by retriggering the gated active LOW-going edge input (nA) or the active HIGH-going edge input (nB).
- How is the output pulse terminated? The output pulse can be terminated at any time by a LOW-going edge on the reset input (nRD).
- What is the ESD protection level? The device has ESD protection exceeding 2000 V for HBM and 1000 V for CDM.
- What are the operating temperature ranges? The device operates from -40°C to +125°C.
- Is the device suitable for automotive applications? Yes, it is qualified to AEC-Q100 (Grade 1) for automotive use.
- What package options are available? The device is available in SO16 (SOT109-1) package.
- What are the logic switching levels? The device operates with TTL logic switching levels.
