NXP Semiconductors PCF85263A 微型实时时钟/日历

NXPPCF85263A 微型实时时钟/日历是一个 CMOS 实时时钟（RTC）和日历，经过优化实现了低功耗，并可在主电源掉电时自动切至电池供电。该 RTC 也可配置为秒表（越时计数器）。由电池切换以及输入驱动事件所触发的三个时间记录寄存器。支持时钟输出和两路独立中断信号、两路警报、I²C 接口和石英晶体校准。典型应用包括打印机、复印件、电子计量、数码相机、白色家电、越时计数器、网络受电设备、电池后备系统、数据记录器、数字录音器、移动设备、精确高耐用定时器。

特性

UL Recognized Component
Provides year, month, day, weekday, hours, minutes, seconds and 100th seconds based on a 32.768kHz quartz crystal
Stop-watch mode for elapsed time counting. From 100th seconds to 999999 hours
Two independent alarms
Battery back-up circuit
WatchDog timer
Three timestamp registers
Two independent interrupt generators plus predefined interrupts at every second, minute, or hour

Frequency adjustment via programmable offset register
Clock operating voltage: 0.9V to 5.5V
Low current; typical 0.28µA at V_DD = 3.0V and Tamb = 25ºC
400kHz two-line I²C-bus interface (at V_DD = 1.8V to 5.5V)
Programmable clock output for peripheral devices (32.768kHz, 16.384kHz, 8.192kHz, 4.096kHz, 2.048kHz, 1.024kHz, and 1Hz)
Configurable oscillator circuit for a wide variety of quartzes: CL = 6pF, CL = 7pF, and CL = 12.5pF
DFN-10, TSSOP-8, and TSSOP-10 package options