Microchip Technology, Inc. Battery-Backed SPI Real-Time Clock/Calendar MCP79510

The MCP79510 SPI RTCC is highly integrated with memory and advanced features normally found in higher priced devices. By starting with a basic real-time clock, digital trimming was added for higher accuracy, a battery switchover for backup power, a timestamp to log power failures and three types of memory, which includes SRAM, EEPROM and a blank unique ID in a locked section of EEPROM. The ID is blank in this device, but can also be ordered with a 48-bit or 64-bit MAC Address. Additional Features Low Power Operation VCC Min = 1.8V Icc < 5 µA Typical Low Backup Power VBAT Min = 1.3V Ibat < 700nA Typical Timekeeping & SRAM Retention Current Automatic Battery Switchover with Timestamp Dual configurable alarms with a 0.01 sec count on one alarm Clock Out frequencies: 32.768, 8.192 & 4.096 KHz and 1 Hz Digital Trimming Range from -255 to + 255 ppm in 1 ppm steps Adjusts up to 22 seconds/day EEPROM has 8 Bytes/Page with Block Sector write protection Protect: None, 1/4, 1/2 or all of array Factory standard MAC address programming or custom ID available