Microchip MCP7940N-I/MS, Real Time Clock (RTC), 64B RAM Serial-I2C, 8-Pin MSOP
5 V, Maximum Operating Temperature: +85 °C, Minimum Operating Supply Voltage: 1.95mm, Length: 3mm, Maximum Operating Supply Voltage: 5.8 V.Microchip MCP7940N-I/MS, Real Time Clock (RTC), 64B RAM Serial-I2C, 8-Pin MSOP, Functions: Battery Backup, Calendar, Date Format: DW:DM:M:Y, Time Format: HH:MM:SS, Mounting Type: Surface Mount, Dimensions: 3 x 3 x 0.