Overview
The 74HCT123D,652, produced by Nexperia USA Inc., is a dual retriggerable monostable multivibrator with reset. This integrated circuit is part of the 74HC/74HCT family and is designed to generate a single pulse of a fixed duration in response to a trigger signal. The device features two independent monostable multivibrators, each capable of producing a pulse width that can be programmed using external components (REXT and CEXT).
The 74HCT123D,652 is particularly useful in applications requiring precise timing and pulse generation, and it is compatible with TTL input levels. Although the specific part number 74HCT123D,652 is listed as obsolete, it remains an important component in understanding the capabilities and applications of similar monostable multivibrators.
Key Specifications
| Specification | Value |
|---|---|
| Type Number | 74HCT123D,652 |
| Package | SO16 (SOT109-1) |
| Supply Voltage Range | 2.0 V to 6.0 V |
| Input Levels | TTL level |
| Power Dissipation | CMOS low power dissipation |
| Noise Immunity | High noise immunity |
| Latch-up Performance | Exceeds 100 mA per JESD 78 Class II Level B |
| Trigger Inputs | Edge triggered inputs (nA or nB) |
| Reset Input | LOW-going edge on input nRD |
Key Features
- Dual Retriggerable Monostable Multivibrator: Each multivibrator can generate a single pulse of a fixed duration in response to a trigger signal.
- Programmable Pulse Width: The pulse width can be programmed using external components (REXT and CEXT).
- Schmitt-Trigger Action: Inputs include Schmitt-trigger action, making the circuit highly tolerant to slower input rise and fall times.
- Wide Supply Voltage Range: Operates from 2.0 V to 6.0 V.
- Low Power Dissipation: CMOS low power dissipation.
- High Noise Immunity: High noise immunity and latch-up performance exceeding 100 mA per JESD 78 Class II Level B.
- Reset Capability: Output delay can be terminated at any time by a LOW-going edge on input nRD.
Applications
The 74HCT123D,652 is suitable for a variety of applications across different industries, including:
- Automotive Systems: Timing and pulse generation in automotive control systems.
- Industrial Control Systems: Used in industrial automation for timing and sequencing tasks.
- Consumer Electronics: Found in consumer devices requiring precise timing, such as audio and video equipment.
- Computing and Networking: Used in computing and networking equipment for timing and synchronization purposes.
- Medical Devices: Applications requiring precise timing in medical equipment.
Q & A
- What is the 74HCT123D,652?
The 74HCT123D,652 is a dual retriggerable monostable multivibrator with reset, produced by Nexperia USA Inc.
- What is the package type of the 74HCT123D,652?
The package type is SO16 (SOT109-1).
- What is the supply voltage range of the 74HCT123D,652?
The supply voltage range is from 2.0 V to 6.0 V.
- What type of input levels does the 74HCT123D,652 support?
The device supports TTL input levels.
- How can the pulse width be programmed in the 74HCT123D,652?
The pulse width can be programmed using external components (REXT and CEXT).
- What is the significance of Schmitt-trigger action in the 74HCT123D,652?
Schmitt-trigger action makes the circuit highly tolerant to slower input rise and fall times.
- Can the output pulse be extended or terminated in the 74HCT123D,652?
Yes, the output pulse can be extended by retriggering either of the edge-triggered inputs (nA or nB), and it can be terminated at any time by a LOW-going edge on input nRD.
- What are the noise immunity and latch-up performance characteristics of the 74HCT123D,652?
The device has high noise immunity and latch-up performance exceeding 100 mA per JESD 78 Class II Level B.
- In which industries is the 74HCT123D,652 commonly used?
The device is used in automotive, industrial, consumer electronics, computing, and medical devices.
- Is the 74HCT123D,652 still in production?
No, the 74HCT123D,652 is listed as obsolete and no longer manufactured.
