LM1851N
Product Overview
Category: Integrated Circuit (IC)
Use: The LM1851N is a voltage supervisor IC that monitors the power supply voltage of electronic systems. It ensures proper operation by generating a reset signal when the voltage falls below a specified threshold.
Characteristics: - Monitors power supply voltage - Generates reset signal - Threshold voltage setting - Low power consumption
Package: DIP (Dual Inline Package)
Essence: The LM1851N is an essential component in electronic systems as it provides reliable voltage monitoring and reset functionality.
Packaging/Quantity: The LM1851N is typically packaged in tubes or trays, with quantities varying depending on the supplier.
Specifications
- Supply Voltage Range: 2.7V to 16V
- Reset Threshold Voltage Options: 4.65V, 4.75V, 4.85V, 4.95V
- Reset Timeout Period: 140ms (min)
- Quiescent Current: 50µA (typ)
- Operating Temperature Range: -40°C to +85°C
Pin Configuration
The LM1851N has a standard 8-pin DIP package with the following pin configuration:
┌───┬───┐
│ 1 │ 8 │
│ │ │
│ │ │
│ │ │
│ │ │
│ │ │
│ │ │
│ 4 │ 5 │
└───┴───┘
Pin Description: 1. VCC: Power supply input 2. GND: Ground reference 3. MR: Manual reset input 4. RESET: Reset output 5. TH: Threshold voltage selection 6. NC: No connection 7. NC: No connection 8. VCC: Power supply input
Functional Features
- Voltage Monitoring: The LM1851N continuously monitors the power supply voltage to ensure it remains within the specified range.
- Reset Signal Generation: When the voltage falls below the threshold, the LM1851N generates a reset signal to initiate a system reset.
- Threshold Voltage Selection: The TH pin allows for the selection of different threshold voltages to suit specific system requirements.
- Manual Reset Input: The MR pin provides an option for manual reset initiation.
Advantages and Disadvantages
Advantages: - Reliable voltage monitoring - Reset signal generation for proper system operation - Low power consumption - Wide operating temperature range
Disadvantages: - Limited threshold voltage options - Manual reset functionality may not be required in all applications
Working Principles
The LM1851N operates by comparing the power supply voltage with the selected threshold voltage. If the voltage drops below the threshold, the reset output is activated, initiating a system reset. The IC continuously monitors the voltage to ensure stable operation.
Application Field Plans
The LM1851N finds applications in various electronic systems where voltage monitoring and reset functionality are critical. Some potential application fields include: - Microcontrollers - Embedded systems - Industrial automation - Power management systems - Automotive electronics
Alternative Models
- LM385-1.2: Similar voltage supervisor IC with a fixed threshold voltage of 1.2V.
- MAX823: Voltage monitor IC with adjustable threshold voltage and additional features like watchdog timer.
- ADM6315: Precision voltage monitor IC with adjustable threshold voltage and low power consumption.
These alternative models offer similar functionality to the LM1851N and can be considered as replacements based on specific requirements.
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Luettele 10 yleistä kysymystä ja vastausta, jotka liittyvät LM1851N :n soveltamiseen teknisissä ratkaisuissa
Sure! Here are 10 common questions and answers related to the application of LM1851N in technical solutions:
Q1: What is LM1851N? A1: LM1851N is a specific model of voltage comparator integrated circuit (IC) manufactured by various semiconductor companies.
Q2: What is the purpose of LM1851N? A2: The LM1851N is primarily used as a voltage comparator, which compares two input voltages and provides an output based on their relative magnitudes.
Q3: What is the operating voltage range of LM1851N? A3: The LM1851N typically operates within a voltage range of 2V to 36V.
Q4: What is the output type of LM1851N? A4: The LM1851N has an open-drain output, which means it can sink current but cannot source current.
Q5: How does LM1851N work? A5: LM1851N compares the voltages at its two inputs and produces a logic-level output based on the comparison. If the voltage at the non-inverting input is higher than the voltage at the inverting input, the output goes low; otherwise, it remains high.
Q6: Can LM1851N be used for level shifting applications? A6: Yes, LM1851N can be used for level shifting applications where the input and output voltage levels need to be shifted.
Q7: What is the maximum output current of LM1851N? A7: The maximum output current that LM1851N can sink is typically around 20mA.
Q8: Is LM1851N suitable for battery-powered applications? A8: Yes, LM1851N is suitable for battery-powered applications due to its low quiescent current consumption.
Q9: Can LM1851N be used in automotive applications? A9: Yes, LM1851N can be used in automotive applications as it can withstand the temperature and voltage ranges typically encountered in automotive environments.
Q10: Are there any specific precautions to consider when using LM1851N? A10: It is important to ensure that the input voltages applied to LM1851N do not exceed its specified voltage range. Additionally, proper decoupling capacitors should be used to minimize noise and stabilize the power supply.
Please note that these answers are general and may vary depending on the specific datasheet and manufacturer's recommendations for LM1851N.