MM74HC123ASJ
- Created at: 2023-10-21 03:15:12 , by WikiIC
- Updated at: 2023-10-21 03:15:12
- Views: 10
MM74HC123ASJ
Product Overview
- Category: Integrated Circuit (IC)
- Use: Multivibrator and Timer
- Characteristics: High-speed, Monostable/Astable Operation, Wide Operating Voltage Range
- Package: Plastic Dual-In-Line Package (PDIP)
- Essence: Dual Retriggerable Monostable Multivibrator
- Packaging/Quantity: Tube/25 pieces per tube
Specifications
- Supply Voltage: 2V to 6V
- Propagation Delay Time: 15 ns (typical)
- Trigger Pulse Width: 30 ns (minimum)
- Operating Temperature Range: -55°C to +125°C
- Output Current: ±25 mA
- Input Capacitance: 3 pF (typical)
Detailed Pin Configuration
The MM74HC123ASJ has a total of 16 pins. The pin configuration is as follows:
- CLR (Clear) - Active LOW input for resetting the multivibrator
- A (Trigger) - Active HIGH input for triggering the multivibrator
- B (Retrigger) - Active HIGH input for retriggering the multivibrator
- GND (Ground) - Ground reference for the IC
- Q (Output) - Output of the multivibrator
- VCC (Positive Supply Voltage) - Positive power supply for the IC
- RCext (External Resistor/Capacitor) - External resistor/capacitor connection for timing control
- RBext (External Resistor) - External resistor connection for timing control
- RAext (External Resistor) - External resistor connection for timing control
- Cext (External Capacitor) - External capacitor connection for timing control
- D (Data) - Active LOW input for data control
- CP (Clock Pulse) - Active HIGH input for clock pulse control
- Q (Output) - Output of the multivibrator
- GND (Ground) - Ground reference for the IC
- VCC (Positive Supply Voltage) - Positive power supply for the IC
- CLR (Clear) - Active LOW input for resetting the multivibrator
Functional Features
- Dual retriggerable monostable multivibrator
- Can be used as a monostable or astable timer
- Wide operating voltage range allows for versatile applications
- High-speed operation with low propagation delay time
- Trigger pulse width can be as short as 30 ns
Advantages and Disadvantages
Advantages
- Versatile functionality as both a monostable and astable timer
- Wide operating voltage range enables use in various circuits
- High-speed operation allows for precise timing control
- Retriggerable feature provides flexibility in triggering events
Disadvantages
- Limited output current capacity may restrict certain applications
- Requires external resistors and capacitors for timing control
Working Principles
The MM74HC123ASJ is a dual retriggerable monostable multivibrator. It can operate in either monostable or astable mode, depending on the external connections. In monostable mode, a trigger pulse applied to the A pin initiates a fixed-duration output pulse. The duration of the output pulse is determined by the values of the external resistor and capacitor connected to the RCext pin.
In astable mode, the MM74HC123ASJ functions as an oscillator. The timing of the output pulses is controlled by the external resistor and capacitor connected to the RCext pin. The B pin is used to retrigger the multivibrator, extending the output pulse duration.
Detailed Application Field Plans
The MM74HC123ASJ finds applications in various fields, including:
- Timing circuits in digital systems
- Pulse generation for control signals
- Frequency division and counting circuits
- Delay circuits for synchronization purposes
- Precision timing in communication systems
- Sequential logic circuitry
- Industrial automation and control systems
Detailed and Complete Alternative Models
Some alternative models to the MM74HC123ASJ include:
- CD74HC123E - High-Speed CMOS Logic Dual Retriggerable Monostable Multivibrator
- SN74HC123N - Dual Retriggerable Monostable Multivibrator with Schmitt-Trigger Inputs
- MC74HC123AN - Dual Retriggerable Monostable Multivibrator with Reset
These alternatives offer similar functionality and can be used as replacements for the MM74HC123ASJ in various applications.
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List 10 common questions and answers related to the application of MM74HC123ASJ in technical solutions
Sure! Here are 10 common questions and answers related to the application of MM74HC123ASJ in technical solutions:
Q: What is MM74HC123ASJ? A: MM74HC123ASJ is a dual retriggerable monostable multivibrator IC, commonly used in timing and control applications.
Q: What is the operating voltage range for MM74HC123ASJ? A: The operating voltage range for MM74HC123ASJ is typically between 2V and 6V.
Q: What is the maximum output current of MM74HC123ASJ? A: The maximum output current of MM74HC123ASJ is around 5mA.
Q: How many inputs does MM74HC123ASJ have? A: MM74HC123ASJ has two inputs - one for triggering and another for resetting.
Q: Can MM74HC123ASJ be used as a frequency divider? A: Yes, MM74HC123ASJ can be used as a frequency divider by connecting the output to the input through appropriate logic gates.
Q: What is the typical propagation delay of MM74HC123ASJ? A: The typical propagation delay of MM74HC123ASJ is around 15 ns.
Q: Can MM74HC123ASJ operate in both monostable and astable modes? A: Yes, MM74HC123ASJ can operate in both monostable (one-shot) and astable (free-running) modes.
Q: What is the maximum trigger frequency for MM74HC123ASJ? A: The maximum trigger frequency for MM74HC123ASJ is typically around 50 MHz.
Q: Can MM74HC123ASJ be used in automotive applications? A: Yes, MM74HC123ASJ is suitable for use in automotive applications as it can withstand a wide temperature range.
Q: What are some common applications of MM74HC123ASJ? A: Some common applications of MM74HC123ASJ include pulse generation, time delay circuits, frequency division, and control signal generation.
Please note that the answers provided here are general and may vary depending on specific datasheet specifications and application requirements.
- https://chipmlcc.ru/product/details/on-semiconductor/mm74hc123asj.html [PDF download, circuit diagram, pin configuration, detailed specifications, and more electronic component spot channels.]
- https://www.chipmlcc.com/product/details/on-semiconductor/mm74hc123asj.html [PDF download, circuit diagram, pin configuration, detailed specifications, and more electronic component spot channels.]
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