The WF8592A is an I2 C-bus*1 serial interface conforming, high-precision real-time clock (RTC) IC with a built-in 32.768 kHz digital temperature-compensated, crystal oscillator circuit. In addition to clock and calendar functions, it is equipped with an alarm interrupt function, fixed-cycle timer interrupt function, time update interrupt function, clock output function, and supply voltage detection function. *1. I2 C-bus is a registered trademark of NXP Semiconductors.
Key Features
High frequency accuracy over temperature: ±5.0ppm -40°C~+85°C, ±7.0ppm -40°C~105°C
Temperature compensation operating supply voltage: 2.0 to 5.5V
Clock operating supply voltage: 1.3 to 5.5V
I2 C-bus serial interface operating supply voltage: 1.5 to 5.5V
I2 C-bus serial interface corresponding to fast data transfer: 400 kHz fast-mode compatible
Low current consumption: 0.6µA (typical) (VDD=3V, 30s temperature compensation interval, clock output disabled)
Clock function: hour, minute, second
Calendar function with auto leap year adjustment: year, month, day, day of week
Alarm interrupt function: day, day of week, hour, minute
Time update interrupt function: minute, second
Fixed-cycle timer interrupt function: 244.14µs to 255min
