NXP's PCF85263ATL/AX Tiny Real-Time Clock/Calendar is a CMOS Real-Time Clock (RTC) and calendar optimized for low power consumption and with automatic switching to battery on main power loss. The RTC can also be configured as a stop-watch (elapsed time counter). Three time log registers triggered from battery switch-over as well as input driven events. Featuring clock output and two independent interrupt signals, two alarms, I2C interface and quartz crystal calibration. Typical applications include printers, copiers, electronic metering, digital cameras, white goods, elapsed time counter, network powered devices, battery backed up systems, data loggers, digital voice recorders, mobile equipment, and accurate high duration timer.
Feature
UL Recognized Component (PCF85263ATL)
Provides year, month, day, weekday, hours, minutes, seconds and 100th secondsbased on a 32.768 kHz 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: 0.9 V to 5.5 V
Low current; typical 0.28 μA at VDD = 3.0 V and Tamb = 25 °C
400 kHz two-line I²C-bus interface (at VDD = 1.8 V to 5.5 V)
Programmable clock output for peripheral devices (32.768 kHz, 16.384 kHz,8.192 kHz, 4.096 kHz, 2.048 kHz, 1.024 kHz, and 1 Hz)
Configurable oscillator circuit for a wide variety of quartzes: CL = 6 pF, CL = 7 pF, andCL = 12.5 pF
Target Applications
Catalogue
FPGA / CPLD
Memory
MOS 
MCU 
DSP
OCEP
Secondary 
Other 
