MCP7940N-I/ST
Introduction
The MCP7940N-I/ST is a part of the Microchip Technology's family of Real-Time Clocks (RTCs). This device provides accurate timekeeping and calendar functionality, making it suitable for a wide range of applications.
Basic Information Overview
- Category: Real-Time Clock (RTC)
- Use: Timekeeping and calendar functionality
- Characteristics: Low power consumption, battery backup, I2C interface
- Package: 8-pin SOIC package
- Essence: Accurate timekeeping and calendar functionality
- Packaging/Quantity: Available in tape and reel packaging, quantity varies by supplier
Specifications
- Operating Voltage: 1.8V to 5.5V
- Timekeeping Current: 400nA at 3.3V, 200nA at 2.2V
- Battery Backup Input for Continuous Timekeeping
- I2C Interface
- Alarm Functionality
- 64 Bytes of SRAM
Detailed Pin Configuration
- VBAT - Battery Backup Input
- SDA - I2C Data
- SCL - I2C Clock
- SQW/INT/SFT - Square Wave Output/Interrupt Output/Software Reset
- GND - Ground
- VSS - Ground
- VDD - Power Supply
- NC - No Connection
Functional Features
- Accurate Timekeeping
- Calendar Functionality
- Battery Backup for Continuous Operation
- I2C Interface for Communication
- Alarm Functionality for Event Notification
Advantages and Disadvantages
Advantages
- Low Power Consumption
- Small Form Factor
- Easy Integration with Microcontrollers
- Battery Backup Ensures Data Integrity
Disadvantages
- Limited SRAM Capacity
- Requires External Crystal for Timekeeping Accuracy
Working Principles
The MCP7940N-I/ST utilizes an internal oscillator and an external crystal to maintain accurate timekeeping. It communicates with microcontrollers via the I2C interface, allowing for seamless integration into various systems. The battery backup input ensures continuous operation even in the absence of primary power.
Detailed Application Field Plans
The MCP7940N-I/ST is commonly used in applications requiring precise timekeeping and calendar functionality. Some key application fields include: - Embedded Systems - Consumer Electronics - Industrial Automation - Medical Devices - Automotive Systems
Detailed and Complete Alternative Models
- DS3231 - Real-Time Clock from Maxim Integrated
- PCF85263A - Real-Time Clock from NXP Semiconductors
- RV-1805-C3 - Real-Time Clock from Micro Crystal AG
In conclusion, the MCP7940N-I/ST offers reliable timekeeping and calendar functionality in a compact and efficient package, making it a versatile choice for a wide range of applications.
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Luettele 10 yleistä kysymystä ja vastausta, jotka liittyvät MCP7940N-I/ST :n soveltamiseen teknisissä ratkaisuissa
What is the operating voltage range of MCP7940N-I/ST?
- The operating voltage range of MCP7940N-I/ST is 1.8V to 5.5V.Can MCP7940N-I/ST be used for real-time clock (RTC) applications?
- Yes, MCP7940N-I/ST is designed for real-time clock (RTC) applications.What is the typical backup battery life of MCP7940N-I/ST?
- The typical backup battery life of MCP7940N-I/ST is 17 years.Does MCP7940N-I/ST have a built-in temperature sensor?
- Yes, MCP7940N-I/ST features a built-in temperature sensor.Is MCP7940N-I/ST compatible with I2C interface?
- Yes, MCP7940N-I/ST is compatible with I2C interface.Can MCP7940N-I/ST operate in temperature extremes?
- Yes, MCP7940N-I/ST can operate in temperature extremes ranging from -40°C to +85°C.What is the accuracy of the timekeeping function in MCP7940N-I/ST?
- The timekeeping function in MCP7940N-I/ST has an accuracy of ±20 ppm.Does MCP7940N-I/ST support alarm functions?
- Yes, MCP7940N-I/ST supports alarm functions with programmable repeat intervals.Can MCP7940N-I/ST be used in battery-powered applications?
- Yes, MCP7940N-I/ST is suitable for battery-powered applications due to its low power consumption.Is MCP7940N-I/ST RoHS compliant?
- Yes, MCP7940N-I/ST is RoHS compliant, making it suitable for environmentally conscious designs.