Microchip MCP7940M-I/SN, Real Time Clock (RTC), 64B RAM Serial-I2C, 8-Pin SOIC
- RS Stock No.:
- 761-7627P
- Mfr. Part No.:
- MCP7940M-I/SN
- Brand:
- Microchip
View all Real Time Clocks
1005 In stock - FREE next working day delivery available
Price Each (Supplied in a Tube)
£0.536
(exc. VAT)
£0.643
(inc. VAT)
| Units | Per unit |
| 25 - 95 | £0.536 |
| 100 + | £0.522 |
Packaging Options:
- RS Stock No.:
- 761-7627P
- Mfr. Part No.:
- MCP7940M-I/SN
- Brand:
- Microchip
- COO (Country of Origin):
- TH
Technical Reference
Legislation and Compliance
- COO (Country of Origin):
- TH
Product Details
MCP7940M I²C Real-Time Clock/Calendars
The Microchip MCP7940M is Real-Time Clock Calendar (RTCC) that supports I²C communications. The MCP7940M includes a digital trimming circuit for accuracy which can compensate for crystal tolerance and temperature.
The MCP7940M features a multi-functional output that can be configured as an alarm output, to output a selectable frequency square wave or as a general purpose output.
The MCP7940M features a multi-functional output that can be configured as an alarm output, to output a selectable frequency square wave or as a general purpose output.
Features
2-Wire Serial Interface, I²C™ Compatible: I²C clock rate up to 400 kHz
On-Chip Digital Trimming/Calibration: ±1 ppm resolution, ±129 ppm range
Tracks Hours, Minutes, Seconds, Day of Week, Day, Month and Year
Leap Year Compensated to 2399
12/24 Hour Modes
Oscillator for 32.768 kHz Crystals: Optimised for 6-9 pF crystals
Dual Programmable Alarms
Versatile Output Pin
Wide Operating Voltage Range: 1.8V to 5.5V
Low Typical Timekeeping Current: 1.2μA at 3.3V
On-Chip Digital Trimming/Calibration: ±1 ppm resolution, ±129 ppm range
Tracks Hours, Minutes, Seconds, Day of Week, Day, Month and Year
Leap Year Compensated to 2399
12/24 Hour Modes
Oscillator for 32.768 kHz Crystals: Optimised for 6-9 pF crystals
Dual Programmable Alarms
Versatile Output Pin
Wide Operating Voltage Range: 1.8V to 5.5V
Low Typical Timekeeping Current: 1.2μA at 3.3V
Real Time Clock Peripherals - Microchip
Specifications
| Attribute | Value |
| Functions | Calendar, NV SRAM |
| Date Format | DW:DM:M:Y |
| Time Format | HH:MM:SS |
| User RAM | 64B |
| Bus Type | Serial-I2C |
| Mounting Type | Surface Mount |
| Package Type | SOIC |
| Pin Count | 8 |
| Dimensions | 4.9 x 3.9 x 1.25mm |
| Length | 4.9mm |
| Width | 3.9mm |
| Height | 1.25mm |
| Maximum Operating Supply Voltage | 5.5 V |
| Maximum Operating Temperature | +85 °C |
| Minimum Operating Temperature | -40 °C |
| Minimum Operating Supply Voltage | 1.8 V |