Overview
The 74AHC123AD,118 is a dual retriggerable monostable multivibrator with reset, manufactured by Nexperia USA Inc. This integrated circuit is part of the 74AHC series and is designed to provide flexible pulse generation capabilities. The device allows for the programming of the basic output pulse width using external components (REXT and CEXT) and can extend the pulse width through retriggering of the edge-triggered inputs. It also features a direct reset function to terminate the output pulse at any time.
Key Specifications
| Type number | VCC (V) | Logic switching levels | Output drive capability (mA) | tpd (ns) | Power dissipation considerations | Tamb (°C) | Rth(j-a) (K/W) | Ψth(j-top) (K/W) | Rth(j-c) (K/W) | Package name |
|---|---|---|---|---|---|---|---|---|---|---|
| 74AHC123AD | 2.0 - 5.5 | CMOS | ± 8 | 5.1 | low | -40 to +125 | 93 | 10.1 | 53 | SO16 (SOT109-1) |
Key Features
- Wide supply voltage range: From 2.0 V to 5.5 V.
- DC triggered inputs: Active HIGH or active LOW inputs.
- Retriggerable pulses: Pulses can be extended up to 100% duty factor.
- Direct reset: Output pulse can be terminated by a LOW-going edge on the nRD input.
- Overvoltage tolerant inputs: Up to 5.5 V, allowing use in mixed voltage environments.
- Schmitt-trigger action on inputs: High noise immunity.
- Low power dissipation: Suitable for energy-efficient designs.
- Multiple package options: Including SO16, DHVQFN16, and TSSOP16.
- ESD protection: HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V, CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V.
Applications
The 74AHC123AD,118 is versatile and can be used in various applications across different industries, including:
- Automotive: For timing and pulse generation in automotive systems.
- Industrial: In control systems, timing circuits, and signal processing.
- Consumer Electronics: For timing and pulse generation in consumer devices.
- Mobile and Wearables: In portable devices requiring efficient and reliable timing circuits.
- Power and Computing: In power management and computing systems where precise timing is crucial.
Q & A
- What is the primary function of the 74AHC123AD,118?
The primary function is to act as a dual retriggerable monostable multivibrator with reset, allowing for the generation and extension of output pulses.
- What is the supply voltage range for the 74AHC123AD,118?
The supply voltage range is from 2.0 V to 5.5 V.
- How can the output pulse width be programmed?
The output pulse width is programmed by selecting external components (REXT and CEXT).
- Can the output pulse be extended?
- How can the output pulse be terminated?
The output pulse can be terminated at any time by a LOW-going edge on the nRD input.
- Are the inputs overvoltage tolerant?
- What is the propagation delay of the 74AHC123AD,118?
The propagation delay is approximately 5.1 ns.
- What are the package options available for the 74AHC123AD,118?
The device is available in SO16 (SOT109-1), DHVQFN16, and TSSOP16 packages.
- What is the operating temperature range for the 74AHC123AD,118?
The operating temperature range is from -40 °C to +125 °C.
- Does the 74AHC123AD,118 have ESD protection?
