MCP7940N-I/SN Battery-Backed I2C™ Real-Time Clock/Calendar With SRAM
MCP7940N-I/SN Battery-Backed I2C™ Real-Time Clock/Calendar With SRAM
- Real-Time Clock/Calendar (RTCC): Hours, Minutes, Seconds, Day of Week, Day, Month, Year
- Leap year compensated to 2399
- 12/24 hour modes
- Oscillator for 32.768 kHz Crystals: Optimized for 6-9 pF crystals
- On-Chip Digital Trimming/Calibration: ±1 PPM resolution, ±129 PPM range
- Dual Programmable Alarms
- Versatile Output Pin: Clock output with selectable frequency, Alarm output, General purpose output
- Power-Fail Time-Stamp: Time logged on switchover to and from Battery mode
- Wide Voltage Range: Operating voltage range of 1.8V to 5.5V, Backup voltage range of 1.3V to 5.5V
- Low Typical Timekeeping Current: Operating from VCC: 1.2 µA at 3.3V, Operating from battery backup: 925 nA at 3.0V
- Automatic Switchover to Battery Backup
| Name | 8-pinSOIC | 8-pinMSOP | 8-pinTSSOP | 8-pinTDFN | 8-pinPDIP | Function |
|---|---|---|---|---|---|---|
| X1 | 1 | 1 | 1 | 1 | 1 | Quartz Crystal Input, External Oscillator Input |
| X2 | 2 | 2 | 2 | 2 | 2 | Quartz Crystal Output |
| VBAT | 3 | 3 | 3 | 3 | 3 | Battery Backup Supply Input |
| Vss | 4 | 4 | 4 | 4 | 4 | Ground |
| SDA | 5 | 5 | 5 | 5 | 5 | Bidirectional Serial Data (I2C™) |
| SCL | 6 | 6 | 6 | 6 | 6 | Serial Clock (I2C) |
| MFP | 7 | 7 | 7 | 7 | 7 | Multifunction Pin |
| Vcc | 8 | 8 | 8 | 8 | 8 | Primary Power Supply |
Standard export packaging available. Customers can choose from cartons, wooden cases, and wooden pallets according to their requirements.
How to obtain the price?
We typically provide quotations within 24 hours of receiving your inquiry (excluding weekends and holidays). For urgent pricing requests, please contact us directly.
What is your delivery time?
Small batches typically ship within 7-15 days, while large batch orders may require approximately 30 days depending on order quantity and season.
What are your payment terms?
Factory pricing with 30% deposit and 70% balance payment via T/T before shipment.
What are the shipping options?
Available shipping methods include sea freight, air freight, and express delivery (EMS, UPS, DHL, TNT, FEDEX). Please confirm your preferred method before ordering.
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Have questions about our products or want to discuss a custom order? Our team is ready to help you.