| PartNumber | MCP79521T-I/MS | MCP79521T-I/MN | MCP79521-I/MS |
| Description | Real Time Clock SPI GP RTCC 2Kb EE 64B SRAM EUI-48 | Real Time Clock SPI GP RTCC 2Kb EE 64B SRAM EUI-48 | Real Time Clock SPI GP RTCC 2Kb EE 64B SRAM EUI-48 |
| Manufacturer | Microchip | Microchip | Microchip Technology |
| Product Category | Real Time Clock | Real Time Clock | Clock/Timing - Real Time Clocks |
| RoHS | Y | Y | - |
| Packaging | Reel | Reel | Tube Alternate Packaging |
| Brand | Microchip Technology | Microchip Technology | - |
| Product Type | Real Time Clock | Real Time Clock | - |
| Factory Pack Quantity | 2500 | 3300 | - |
| Subcategory | Clock & Timer ICs | Clock & Timer ICs | - |
| Series | - | - | - |
| Product | - | - | Real Time Clocks |
| Type | - | - | Clock/Calendar |
| Unit Weight | - | - | 0.005051 oz |
| Mounting Style | - | - | SMD/SMT |
| Package Case | - | - | MSOP-10 |
| Operating Temperature | - | - | -40°C ~ 85°C |
| Mounting Type | - | - | Surface Mount |
| Features | - | - | Alarm, EEPROM, Leap Year, Square Wave Output, SRAM, Unique ID |
| Function | - | - | Calendar Clock |
| Interface | - | - | SPI |
| Voltage Supply | - | - | 1.8 V ~ 3.6 V |
| Supplier Device Package | - | - | 10-MSOP |
| Memory Size | - | - | 64B |
| Time Format | - | - | HH:MM:SS:hh (12/24 hr) |
| Date Format | - | - | YY-MM-DD-dd |
| Voltage Supply Battery | - | - | 1.3 V ~ 3.6 V |
| Current Timekeeping Max | - | - | 1μA @ 1.8V ~ 3.6V |
| Maximum Operating Temperature | - | - | + 85 C |
| Minimum Operating Temperature | - | - | - 40 C |
| Battery Backup Switching | - | - | Backup Switching |
| Supply Voltage Max | - | - | 3.6 V |
| Supply Voltage Min | - | - | 1.8 V |
| RTC Bus Interface | - | - | SPI |
| RTC Memory Size | - | - | 64 B |