MCP7940N-I/SN
- Mfr.Part #
- MCP7940N-I/SN
- Manufacturer
- Microchip Technology
- Package / Case
- 8-SOIC (0.154, 3.90mm Width)
- Datasheet
- Download
- Description
- IC RTC CLK/CALENDAR I2C 8-SOIC
- Stock
- 654,752
- In Stock :
- 654,752
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- Manufacturer :
- Microchip Technology
- Product Category :
- Real Time Clocks
- Published :
- 1998
- Max Operating Temperature :
- 85 °C
- Mount :
- Surface Mount
- Voltage - Supply, Battery :
- 1.3V~5.5V
- Product Type :
- Real Time Clocks
- Dimensions :
- 4.9 x 3.9 x 1.5mm
- JESD-609 Code :
- e3
- Memory Size :
- 64B
- Package Type :
- SOIC
- Peak Reflow Temperature (Cel) :
- 260
- Series :
- Automotive, AEC-Q100
- Power Supplies :
- 2/5V
- ECCN Code :
- EAR99
- Logic Function :
- Clock
- MSL :
- -
- HTS Code :
- 8542.39.00.01
- Terminal Position :
- Dual
- Battery Backup Switching :
- Backup Switching
- Factory Lead Time :
- 6 Weeks
- Maximum Operating Temperature :
- +85 °C
- Moisture Sensitivity Level (MSL) :
- 1 (Unlimited)
- Time Format :
- HH:MM:SS (12/24 hr)
- Terminal Finish :
- Matte Tin (Sn) - annealed
- Interface :
- I2C, 2-Wire Serial
- Mounting :
- Surface Mount
- REACH SVHC :
- No SVHC
- Brand :
- Microchip Technology / Atmel
- Current - Timekeeping (Max) :
- 1.2μA @ 3.3V
- Screening Level :
- Industrial
- Length :
- 4.9mm
- Lead Free :
- Lead Free
- Operating Temperature :
- -40°C~85°C
- Product Category :
- Real Time Clock
- Number of Pins :
- 8
- Date Format :
- YY-MM-DD-dd
- Qualification Status :
- Not Qualified
- Feature :
- Alarm, Leap Year, Square Wave Output, SRAM
- RoHS Status :
- ROHS3 Compliant
- Max Frequency :
- 400kHz
- Time-Min :
- SECONDS
- Package Shape :
- RECTANGULAR
- Product Status :
- Active
- Voltage - Supply :
- 1.8V~5.5V
- Type :
- Clock/Calendar
- Number of Terminals :
- 8
- Contact Plating :
- Tin
- Information Access Method :
- I2C
- Package / Case :
- 8-SOIC (0.154, 3.90mm Width)
- Supplier Package :
- SOIC N
- Operating Supply Voltage :
- 2.5, 3.3, 5 V
- Mounting Style :
- SMD/SMT
- Bus Type :
- Serial I2C
- uPs/uCs/Peripheral ICs Type :
- TIMER, REAL TIME CLOCK
- Radiation Hardening :
- No
- Supply Voltage :
- 2.5V
- Mounting Type :
- Surface Mount
- Base Part Number :
- MCP7940N
- Reach Compliance Code :
- Compliant
- Maximum Operating Supply Voltage :
- 5.5 V
- Volatile :
- yes
- Number of Terminations :
- 8
- Min Supply Voltage :
- 1.8 V
- JESD-30 Code :
- R-PDSO-G8
- RoHS :
- Details
- Seated Height-Max :
- 1.75 mm
- Terminal Form :
- Gull wing
- Max Supply Voltage :
- 5.5 V
- Package :
- Tube
- Pin Count :
- 8
- Height :
- 1.5mm
- Supplier Device Package :
- 8-SOIC
- Time@Peak Reflow Temperature-Max (s) :
- 40
- Surface Mount :
- yes
- Minimum Operating Temperature :
- -40 °C
- Terminal Pitch :
- 1.27mm
- Base Product Number :
- MCP7940
- Schedule B :
- 8542390000
- Min Operating Temperature :
- -40 °C
- Functions :
- Battery Backup, Calendar
- Function :
- Clock/Calendar/Alarm/Battery Backup
- Lifecycle Status :
- Production (Last Updated: 2 years ago)
- Width :
- 3.9mm
- Minimum Operating Supply Voltage :
- 1.8 V
- Temperature Grade :
- Industrial
- Packaging :
- Tube
- Manufacturer :
- Microchip
- Interrupt Capability :
- Y
- Features :
- Alarm, Leap Year, Square Wave Output, SRAM
- Datasheets
- MCP7940N-I/SN

Real Time Clocks Microchip Technology MCP7940N-I/SN Overview
The MCP7940N-I/SN by Microchip Technology is an advanced real-time clock/calendar optimized for effective time tracking and data logging solutions. This IC integrates seamlessly with various microcontroller projects through its I2C communication interface, providing precision and reliability in timekeeping. It is housed in a compact 8-SOIC package, making it suitable for space-constrained applications. The design and functionality of the MCP7940N-I/SN make it an excellent choice for developers requiring a low-power yet highly accurate timekeeping component, bolstered by Microchip’s reputation for quality and performance.
MCP7940N-I/SN Features
- Real-Time Clock/Calendar functionality tracks seconds, minutes, hours, days, date, months, and years.
- I2C Interface ensures easy integration with most microcontrollers and processors.
- Battery-backed operation enhances reliability in variable power conditions.
- 64-byte battery-backed SRAM for data storage.
- Automatic leap year compensation until 2399 ensures continued accuracy.
- Low power consumption suitable for battery-driven applications.
- Compact 8-SOIC package fits easily into various design layouts.
MCP7940N-I/SN Applications
- Consumer Electronics: Utilized in smart home devices, this IC ensures accurate timekeeping for automation tasks and user interface functionality.
- Wearable Technology: Provides precise time and date functionality in smartwatches and fitness trackers, enhancing user experience and device reliability.
- Industrial Systems: Ideal for time-stamping and real-time data logging in manufacturing processes and equipment monitoring.
- Portable Medical Devices: Ensures the accurate tracking of time in devices like glucose monitors and wearable health trackers, critical for patient data logs.
- Telecommunication Systems: Used in network hardware to maintain accurate time stamps for logging events and managing records efficiently.
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