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| # | Part: | Description: | Manuf. | Package | Pins | T°min | T°max | PDF size |
| 1. |  MCP79400 | I2C Real-Time Clock/Calendar with SRAM, Unique ID and Battery Switchover | Microchip Technology | MICROCHIP | - | - | - | 580 Kb |
| 2. | MCP79401 | I2C Real-Time Clock/Calendar with SRAM, Unique ID and Battery Switchover | Microchip Technology | MICROCHIP | - | - | - | 580 Kb |
| 3. | MCP79402 | I2C Real-Time Clock/Calendar with SRAM, Unique ID and Battery Switchover | Microchip Technology | MICROCHIP | - | - | - | 580 Kb |
| 4. | MCP7940N | Low-Cost I2C Real-Time Clock/Calendar with SRAM and Battery Switchover | Microchip Technology | MICROCHIP | - | - | - | 568 Kb |
| 5. | MCP7940NT | Low-Cost I2C Real-Time Clock/Calendar with SRAM and Battery Switchover | Microchip Technology | MICROCHIP | - | - | - | 568 Kb |
| 6. | MCP79410 | I2C Real-Time Clock/Calendar with EEPROM, SRAM, Unique ID and Battery Switchover | Microchip Technology | MICROCHIP | - | - | - | 586 Kb |
| 7. | MCP79410_13 | Battery-Backed I2C Real-Time Clock/Calendar with EEPROM and Unique ID | Microchip Technology | MICROCHIP | - | - | - | 1.02 Mb |
| 8. | MCP79411 | Battery-Backed I2C Real-Time Clock/Calendar with EEPROM and Unique ID | Microchip Technology | MICROCHIP | - | - | - | 1.02 Mb |
| 9. | MCP79412 | Battery-Backed I2C Real-Time Clock/Calendar with EEPROM and Unique ID | Microchip Technology | MICROCHIP | - | - | - | 1.02 Mb |
| 10. | MCP79511 | 3V SPI Real-Time Clock Calendar with Battery Switchover | Micro Analog systems | MAS | - | - | - | 883 Kb |
| 11. | MCP79512 | 3V SPI Real-Time Clock Calendar with Battery Switchover | Micro Analog systems | MAS | - | - | - | 883 Kb |
| 12. | MCP7951X | 3V SPI Real-Time Clock Calendar with Battery Switchover | Micro Analog systems | MAS | - | - | - | 883 Kb |
| 13. | MCP79520 | 3V SPI Real-Time Clock Calendar with Battery Switchover | Micro Analog systems | MAS | - | - | - | 883 Kb |
| 14. | MCP79521 | 3V SPI Real-Time Clock Calendar with Battery Switchover | Micro Analog systems | MAS | - | - | - | 883 Kb |
| 15. | MCP79522 | 3V SPI Real-Time Clock Calendar with Battery Switchover | Micro Analog systems | MAS | - | - | - | 883 Kb |
| 16. | MCP7952X | 3V SPI Real-Time Clock Calendar with Battery Switchover | Micro Analog systems | MAS | - | - | - | 883 Kb |
| 17. | MCP795B10 | SPI Real-Time Clock Calendar | Micro Analog systems | MAS | - | - | - | 901 Kb |
| 18. | MCP795B11 | SPI Real-Time Clock Calendar | Micro Analog systems | MAS | - | - | - | 901 Kb |
| 19. | MCP795B12 | SPI Real-Time Clock Calendar | Micro Analog systems | MAS | - | - | - | 901 Kb |
| 20. | MCP795B20 | SPI Real-Time Clock Calendar | Micro Analog systems | MAS | - | - | - | 901 Kb |
