Specifications
| Attribute | Value |
| Package | Tube |
| Series | Automotive, AEC-Q100 |
| ProductStatus | Active |
| Type | Clock/Calendar |
| Features | Alarm, Leap Year, Square Wave Output, SRAM |
| MemorySize | 64B |
| TimeFormat | HH:MM:SS (12/24 hr) |
| DateFormat | YY-MM-DD-dd |
| Interface | I²C, 2-Wire Serial |
| Voltage-Supply | 1.8V ~ 5.5V |
| Voltage-SupplyBattery | 1.3V ~ 5.5V |
| Current-Timekeeping(Max) | 1.2µA @ 3.3V |
| OperatingTemperature | -40°C ~ 125°C |
| MountingType | Surface Mount |
| Package/Case | 8-SOIC (0.154, 3.90mm Width) |
Overview
Description
The MCP7940N-E/SN is a real-time clock/calendar (RTC) chip manufactured by Microchip Technology. It is designed to provide highly accurate timekeeping and calendar functionalities, making it suitable for various applications requiring precise time management. The device operates using a low-power 32.768 kHz crystal oscillator and includes features such as a battery backup input to maintain operation in the absence of main power.
Key features of the MCP7940N-E/SN include:
1. Timekeeping: Provides time and date information in seconds, minutes, hours, day of the week, date, month, and year format, with built-in leap year correction up to the year 2399.
2. Power Management: Equipped with a battery backup to ensure continuous timekeeping during power failures.
3. I2C Interface: Communicates with microcontrollers through an I2C bus, supporting a range of clock and calendar functions.
4. On-Chip Memory: Includes 64 bytes of SRAM and 64 bytes of EEPROM for storing user data.
5. Alarm and Timer Functions: Features programmable alarms and a square wave output.
The MCP7940N-E/SN is widely used in applications like consumer electronics, industrial systems, and any embedded system requiring reliable timekeeping.
Key features of the MCP7940N-E/SN include:
1. Timekeeping: Provides time and date information in seconds, minutes, hours, day of the week, date, month, and year format, with built-in leap year correction up to the year 2399.
2. Power Management: Equipped with a battery backup to ensure continuous timekeeping during power failures.
3. I2C Interface: Communicates with microcontrollers through an I2C bus, supporting a range of clock and calendar functions.
4. On-Chip Memory: Includes 64 bytes of SRAM and 64 bytes of EEPROM for storing user data.
5. Alarm and Timer Functions: Features programmable alarms and a square wave output.
The MCP7940N-E/SN is widely used in applications like consumer electronics, industrial systems, and any embedded system requiring reliable timekeeping.
Equivalent
The MCP7940N-E/SN is a Real-Time Clock (RTC) IC. Equivalent products include:
1. DS1307 from Maxim Integrated: A widely used RTC with similar features.
2. PCF8563 from NXP: Another popular RTC with low power consumption.
3. DS3231 from Maxim Integrated: Offers higher accuracy with an integrated crystal.
4. RV-3028-C7 from Micro Crystal: Known for low power and high accuracy.
These alternatives offer similar functionality, but it's important to verify pin compatibility and specific feature requirements for replacements.
1. DS1307 from Maxim Integrated: A widely used RTC with similar features.
2. PCF8563 from NXP: Another popular RTC with low power consumption.
3. DS3231 from Maxim Integrated: Offers higher accuracy with an integrated crystal.
4. RV-3028-C7 from Micro Crystal: Known for low power and high accuracy.
These alternatives offer similar functionality, but it's important to verify pin compatibility and specific feature requirements for replacements.
Features
The MCP7940N-E/SN is a real-time clock/calendar (RTC) IC designed by Microchip Technology. Key features include:
1. Timekeeping: Tracks seconds, minutes, hours, day, date, month, and year with leap year compensation up to 2099.
2. Oscillator: Integrated 32.768 kHz crystal oscillator with battery switchover for backup timekeeping.
3. EEPROM: Includes 64 bytes of battery-backed SRAM and 128 bytes of EEPROM for data retention.
4. Alarms and Output: Two programmable alarms with battery-backed event detection; provides a programmable clock output (CLKOUT).
5. Interface: I2C communication interface supports fast mode up to 400 kHz.
6. Power Management: Automatic backup power switchover and Power-Fail Time-Stamp feature to log the time of power loss.
7. Calibration: Digital trimming to compensate for inaccuracies in the oscillator.
8. Temperature Range: Operates over a temperature range of -40°C to +85°C.
9. Package: Available in 8-pin SOIC package.
These features make the MCP7940N-E/SN suitable for applications requiring precise timekeeping and data logging with minimal power consumption.
1. Timekeeping: Tracks seconds, minutes, hours, day, date, month, and year with leap year compensation up to 2099.
2. Oscillator: Integrated 32.768 kHz crystal oscillator with battery switchover for backup timekeeping.
3. EEPROM: Includes 64 bytes of battery-backed SRAM and 128 bytes of EEPROM for data retention.
4. Alarms and Output: Two programmable alarms with battery-backed event detection; provides a programmable clock output (CLKOUT).
5. Interface: I2C communication interface supports fast mode up to 400 kHz.
6. Power Management: Automatic backup power switchover and Power-Fail Time-Stamp feature to log the time of power loss.
7. Calibration: Digital trimming to compensate for inaccuracies in the oscillator.
8. Temperature Range: Operates over a temperature range of -40°C to +85°C.
9. Package: Available in 8-pin SOIC package.
These features make the MCP7940N-E/SN suitable for applications requiring precise timekeeping and data logging with minimal power consumption.
Pinout
The MCP7940N-E/SN is an I2C Real-Time Clock (RTC) from Microchip Technology. It comes in an 8-pin SOIC (Small Outline Integrated Circuit) package. Here is a brief overview of its pin functions:
1. VCC: Power supply pin.
2. X1: Oscillator input pin for an external 32.768 kHz crystal.
3. X2: Oscillator output pin for an external 32.768 kHz crystal.
4. VBAT: Backup battery input to maintain timekeeping during power loss.
5. GND: Ground pin.
6. SDA: Serial data line for I2C communication.
7. SCL: Serial clock line for I2C communication.
8. MFP (Multi-Function Pin): Programmable output for square wave or alarm interrupt.
The MCP7940N-E/SN facilitates timekeeping, alarm, and timestamp functions, making it suitable for applications requiring accurate timekeeping over long periods. It supports a wide operating voltage range and features battery backup for continuous operation during power failures.
1. VCC: Power supply pin.
2. X1: Oscillator input pin for an external 32.768 kHz crystal.
3. X2: Oscillator output pin for an external 32.768 kHz crystal.
4. VBAT: Backup battery input to maintain timekeeping during power loss.
5. GND: Ground pin.
6. SDA: Serial data line for I2C communication.
7. SCL: Serial clock line for I2C communication.
8. MFP (Multi-Function Pin): Programmable output for square wave or alarm interrupt.
The MCP7940N-E/SN facilitates timekeeping, alarm, and timestamp functions, making it suitable for applications requiring accurate timekeeping over long periods. It supports a wide operating voltage range and features battery backup for continuous operation during power failures.
Manufacturer
The MCP7940N-E/SN is manufactured by Microchip Technology Inc. Microchip Technology is a leading semiconductor company that specializes in the design and production of microcontrollers, memory devices, and analog and interface products. They provide solutions for a wide range of applications, including automotive, industrial, consumer electronics, and telecommunications. The company is known for its focus on providing high-quality, reliable, and cost-effective solutions to meet the needs of its global customer base.
Application
The MCP7940N-E/SN is a Real-Time Clock/Calendar (RTC) chip with features suitable for various applications. Key application areas include:
1. Consumer Electronics: Used for timekeeping in devices such as digital cameras and portable music players.
2. Industrial Control: Provides accurate time-stamping and scheduling for automation systems and data loggers.
3. Communication Equipment: Ensures time synchronization in routers and switches.
4. Home Appliances: Used for clock functionality in appliances like microwaves and ovens.
5. Energy Management: Facilitates time-based metering in smart grids and power distribution systems.
6. Medical Devices: Supports scheduling and logging in medical monitoring equipment.
Its reliability and low power consumption make it ideal for battery-operated and long-duration applications.
1. Consumer Electronics: Used for timekeeping in devices such as digital cameras and portable music players.
2. Industrial Control: Provides accurate time-stamping and scheduling for automation systems and data loggers.
3. Communication Equipment: Ensures time synchronization in routers and switches.
4. Home Appliances: Used for clock functionality in appliances like microwaves and ovens.
5. Energy Management: Facilitates time-based metering in smart grids and power distribution systems.
6. Medical Devices: Supports scheduling and logging in medical monitoring equipment.
Its reliability and low power consumption make it ideal for battery-operated and long-duration applications.
Package
The MCP7940N-E/SN is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) package.
