Overview
The 74AHC123AD 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 for a wide range of applications requiring precise timing and pulse generation. The device features two independent monostable multivibrator circuits, each capable of generating a pulse width that can be programmed using external components (REXT and CEXT).
The 74AHC123AD operates over a supply voltage range of 2.0 V to 5.5 V and is specified to function from -40°C to 125°C. It is available in a SO16 (SOT109-1) package, making it suitable for surface mount applications.
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 ~ 125 | 93 | 10.1 | 53 | SO16 (SOT109-1) |
Key Features
- Dual retriggerable monostable multivibrator with reset.
- Basic output pulse width programmed by external components (REXT and CEXT).
- Retriggerable for very long pulses up to 100% duty factor.
- Direct reset terminates output pulse.
- Overvoltage tolerant inputs to 5.5 V.
- All inputs have a Schmitt-trigger action for high noise immunity.
- Wide supply voltage range from 2.0 V to 5.5 V.
- Operating temperature range from -40°C to 125°C.
- Low power consumption and high-speed operation with a propagation delay of 5.1 ns.
- 8 mA output drive capability for both high and low states.
- Compatible with 74HC, 74HCT, 74AC, and 74ACT logic families.
Applications
- Timing and pulse generation circuits.
- Signal conditioning and interface applications.
- Industrial and consumer electronics.
- Automotive and power applications.
- Computing and mobile devices.
Q & A
- What is the 74AHC123AD used for?
The 74AHC123AD is used as a dual retriggerable monostable multivibrator with reset, suitable for timing and pulse generation in various electronic circuits.
- What is the supply voltage range of the 74AHC123AD?
The supply voltage range is from 2.0 V to 5.5 V.
- What is the operating temperature range of the 74AHC123AD?
The operating temperature range is from -40°C to 125°C.
- What type of inputs does the 74AHC123AD have?
The inputs are overvoltage tolerant and have a Schmitt-trigger action for high noise immunity.
- Can the 74AHC123AD be used in mixed voltage environments?
- What is the propagation delay of the 74AHC123AD?
The propagation delay is 5.1 ns.
- What is the output drive capability of the 74AHC123AD?
The output drive capability is ± 8 mA.
- Is the 74AHC123AD compatible with other logic families?
- What package options are available for the 74AHC123AD?
The device is available in SO16 (SOT109-1) and other package options like TSSOP and DHVQFN.
- Is the 74AHC123AD,112 still available for purchase?
No, the 74AHC123AD,112 is withdrawn and end-of-life.
