Overview
The 74HC123D/AUJ, produced by NXP USA Inc. (now part of Nexperia), is a dual retriggerable monostable multivibrator with reset. This integrated circuit is designed to generate a single pulse of a fixed duration in response to an input signal. It is part of the 74HC/74HCT family of logic ICs, known for their high noise immunity and low power dissipation.
Key Specifications
| Parameter | Value |
|---|---|
| Type Number | 74HC123D/AUJ |
| Package | SO16 (SOT109-1) |
| Supply Voltage (VCC) | 2.0 V to 6.0 V |
| Logic Switching Levels | CMOS |
| Output Drive Capability | ± 5.2 mA |
| Propagation Delay (tpd) | 26 ns |
| Power Dissipation | Low |
| Operating Temperature (Tamb) | -40°C to 125°C |
Key Features
- Retriggerable Monostable Multivibrator: The device can extend the output pulse width by retriggering the edge-triggered inputs (nA or nB), allowing for variable pulse durations.
- Schmitt-Trigger Inputs: Inputs nA and nB have Schmitt-trigger action, making the circuit tolerant to slower input rise and fall times.
- Reset Capability: The output pulse can be terminated at any time by a LOW-going edge on the reset input (nRD).
- High Noise Immunity: The device has high noise immunity and latch-up performance exceeding 100 mA per JESD 78 Class II Level B.
- Low Power Dissipation: CMOS technology ensures low power consumption.
Applications
The 74HC123D/AUJ is versatile and can be used in various applications across different industries, including:
- Automotive Systems: For timing and pulse generation in automotive electronics.
- Industrial Control Systems: In timing circuits and pulse generators for industrial automation.
- Consumer Electronics: In devices requiring precise timing and pulse generation, such as audio and video equipment.
- Computing and Networking: For timing and synchronization in computer and network hardware.
Q & A
- What is the primary function of the 74HC123D/AUJ?
The primary function is to act as a dual retriggerable monostable multivibrator with reset, generating a single pulse of a fixed duration in response to an input signal. - What is the supply voltage range for the 74HC123D/AUJ?
The supply voltage range is from 2.0 V to 6.0 V. - What type of logic switching levels does the 74HC123D/AUJ use?
The device uses CMOS logic switching levels. - How can the output pulse width be extended?
The output pulse width can be extended by retriggering the edge-triggered inputs (nA or nB). - Can the output pulse be terminated prematurely?
Yes, the output pulse can be terminated at any time by a LOW-going edge on the reset input (nRD). - What is the operating temperature range for the 74HC123D/AUJ?
The operating temperature range is from -40°C to 125°C. - What package type is the 74HC123D/AUJ available in?
The device is available in an SO16 (SOT109-1) package. - Does the 74HC123D/AUJ have high noise immunity?
Yes, the device has high noise immunity and latch-up performance exceeding 100 mA per JESD 78 Class II Level B. - What are some common applications of the 74HC123D/AUJ?
Common applications include automotive systems, industrial control systems, consumer electronics, and computing and networking hardware. - Is the 74HC123D/AUJ compliant with any specific standards?
Yes, it complies with JEDEC standards.
