Maxim Integrated DS1391U-3+, Real Time Clock (RTC) Serial-SPI, 10-Pin μMAX
Maxim Integrated DS1391U-3+, Real Time Clock (RTC) Serial-SPI, 10-Pin μMAX, Functions: Calendar, Date Format: YY:MM:DD, Time Format: HH:MM:SS, Mounting Type: Surface Mount, Dimensions: 3 x 3 x 0.95mm, Length: 3mm, Maximum Operating Supply Voltage: 3.3 V, Maximum Operating Temperature: +85 °C, Minimum Operating Supply Voltage: 2.7 V, Minimum Operating Temperature: -40 °C