Overview
The 74HC123DB118 is a dual retriggerable monostable multivibrator produced by Nexperia USA Inc. This component is part of the 74HC series, which is known for its high-speed Si-gate CMOS technology. The device is pin-compatible with Low-power Schottky TTL (LSTTL) and complies with JEDEC standard no. 7A. It is widely used in various electronic circuits where precise timing and pulse generation are required.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VIH (HIGH-level input voltage) | VCC = 2.0 V | 1.5 | - | 1.5 | V |
| VIH (HIGH-level input voltage) | VCC = 4.5 V | 3.15 | - | 3.15 | V |
| VIH (HIGH-level input voltage) | VCC = 6.0 V | 4.2 | - | 4.2 | V |
| VIL (LOW-level input voltage) | VCC = 2.0 V | - | 0.8 | 0.5 | V |
| VIL (LOW-level input voltage) | VCC = 4.5 V | - | 2.1 | 1.35 | V |
| VIL (LOW-level input voltage) | VCC = 6.0 V | - | 2.8 | 1.8 | V |
| VOH (HIGH-level output voltage) | IO = -20 μA; VCC = 2.0 V | 1.9 | 2.0 | - | V |
| VOH (HIGH-level output voltage) | IO = -20 μA; VCC = 4.5 V | 4.4 | 4.5 | - | V |
| VOH (HIGH-level output voltage) | IO = -20 μA; VCC = 6.0 V | 5.4 | 5.5 | - | V |
| tpd (Propagation delay nRD, nA, nB to nQ or nQ) | VCC = 4.5 V; CEXT = 0 pF; REXT = 5 kΩ | - | 51 | 64 | ns |
Key Features
- Dual Retriggerable Monostable Multivibrator: The 74HC123DB118 features two independent monostable multivibrators, each capable of generating a single pulse or a continuous train of pulses.
- Output Pulse Width Control: The output pulse width can be programmed using an external resistor (REXT) and capacitor (CEXT), and can be extended by retriggering the inputs.
- Reset Functionality: The device includes a reset input (nRD) that can terminate the output pulse at any time and inhibit further triggering.
- High-Speed Si-Gate CMOS Technology: Ensures low power consumption and high speed operation.
- JEDEC Standard Compliance: Complies with JEDEC standard no. 7A, ensuring compatibility with other logic devices.
Applications
The 74HC123DB118 is versatile and can be used in a variety of applications, including:
- Timing and Pulse Generation: In circuits requiring precise timing and pulse generation, such as in digital counters, timers, and oscillators.
- Automotive Electronics: Due to its robustness and reliability, it is suitable for use in automotive systems.
- Industrial Control Systems: For applications requiring reliable and precise timing signals in industrial environments.
- Consumer Electronics: In devices such as audio equipment, video recorders, and other consumer electronic products.
Q & A
- What is the 74HC123DB118?
The 74HC123DB118 is a dual retriggerable monostable multivibrator produced by Nexperia USA Inc. - What technology does the 74HC123DB118 use?
It uses high-speed Si-gate CMOS technology. - How can the output pulse width be controlled?
The output pulse width can be programmed using an external resistor (REXT) and capacitor (CEXT), and can be extended by retriggering the inputs. - What is the function of the reset input (nRD)?
The reset input (nRD) can terminate the output pulse at any time and inhibit further triggering. - Is the 74HC123DB118 compliant with any industry standards?
Yes, it complies with JEDEC standard no. 7A. - What are some common applications of the 74HC123DB118?
It is used in timing and pulse generation circuits, automotive electronics, industrial control systems, and consumer electronics. - What is the typical propagation delay of the 74HC123DB118?
The typical propagation delay is around 51 ns at VCC = 4.5 V. - Can the 74HC123DB118 be used in high-temperature environments?
Yes, it can operate over a temperature range of -40°C to +125°C. - What is the package type of the 74HC123DB118?
The package type is typically DIP or SOIC, but specific packages may vary. - Where can I find detailed specifications and datasheets for the 74HC123DB118?
Detailed specifications and datasheets can be found on the Nexperia website or through authorized distributors like Digi-Key, Mouser, etc.
