Microchip MCP795W10-I/SL, Real Time Clock (RTC) Serial-SPI, 14-Pin SOIC, Часы реального времени

The MCP795W10 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 time stamp to log power failures and three types of memory, which includes SRAM, EEPROM and a blank unique ID in a locked section of EEPROM that can also be ordered with a 48-bit or 64-bit MAC Address.

VCC Min = 1.8V
Icc < 1 μA Typical Standby Current
VBAT Min = 1.3V
Ibat < 700nA Typical Timekeeping & SRAM Retention Current
VCC to VBAT (VCC Lost)
VBAT to VCC (VCC Restored)
Low Power Operation
VCC Min = 1.8V
Icc < 1 μA Typical Standby Current
Low Backup Power
VBAT Min = 1.3V
Ibat < 700nA Typical Timekeeping & SRAM Retention Current
Automatic Battery Switchover with Timestamp
VCC to VBAT (VCC Lost)
VBAT to VCC (VCC Restored)

Datasheet