Overview
The 74HCT123DB118 is a dual retriggerable monostable multivibrator integrated circuit produced by Nexperia USA Inc. This component is part of the 74HCT series, which is known for its high-speed CMOS logic with TTL-compatible inputs. The device is designed to generate a single pulse of fixed duration in response to a rising or falling edge of the input signal, making it useful in various timing and pulse generation applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Propagation Delay | 77 ns | ns |
| Current Output (High/Low) | 4 mA / 4 mA | mA |
| Voltage Supply | 4.5 V to 5.5 V | V |
| Operating Temperature | -40°C to 125°C | °C |
| Minimum Input Pulse Width | 20 ns to 30 ns (depending on VCC) | ns |
| Output Pulse Width | 40 µs to 51.3 µs (with RX = 10KΩ, CX = 10nF) | µs |
| Package Type | 16-pin SSOP |
Key Features
- Retriggerable monostable multivibrator with two independent circuits.
- High-speed CMOS logic with TTL-compatible inputs.
- Low power consumption.
- Balanced propagation delay and transition times.
- Significant power reduction compared to LSTTL logic ICs.
- Operating voltage range from 4.5 V to 5.5 V.
- Wide operating temperature range from -40°C to 125°C.
Applications
The 74HCT123DB118 is suitable for a variety of applications requiring precise timing and pulse generation, such as:
- Timing circuits in digital systems.
- Pulse stretching and shaping.
- Frequency division and counting circuits.
- Sequential logic circuits.
- Automotive and industrial control systems.
Q & A
- What is the primary function of the 74HCT123DB118?
The primary function is to act as a dual retriggerable monostable multivibrator, generating a single pulse of fixed duration in response to an input signal. - What is the operating voltage range of the 74HCT123DB118?
The operating voltage range is from 4.5 V to 5.5 V. - What is the propagation delay of the 74HCT123DB118?
The propagation delay is approximately 77 ns. - What is the current output capability of the 74HCT123DB118?
The current output is 4 mA for both high and low states. - What is the operating temperature range of the 74HCT123DB118?
The operating temperature range is from -40°C to 125°C. - What package type is the 74HCT123DB118 available in?
The component is available in a 16-pin SSOP package. - Is the 74HCT123DB118 still in production?
No, the 74HCT123DB118 is no longer manufactured, but substitutes or alternative package types may be available. - What are some common applications of the 74HCT123DB118?
Common applications include timing circuits, pulse stretching and shaping, frequency division, and sequential logic circuits. - How does the 74HCT123DB118 handle retriggering?
The device can be retriggered by additional input pulses, extending the output pulse duration. - What are the benefits of using CMOS logic in the 74HCT123DB118?
CMOS logic offers low power consumption and significant power reduction compared to LSTTL logic ICs.
