NXP | PCF8523T/1,118

The PCF8523T/1,118 is a Part of PCF8523 series, CMOS Real-Time Clock (RTC) and calendar optimized for low power consumption

Features:

• Provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal
• Resolution: seconds to years
• Clock operating voltage: 1.0 V to 5.5 V
• Low backup current: typical 150 nA at VDD = 3.0 V and Tamb = 25 °C
• 2 line bidirectional 1 MHz Fast-mode Plus (Fm+) I²C interface
• Battery backup input pin and switch-over circuit
• Freely programmable timer and alarm with interrupt capability
• Selectable integrated oscillator load capacitors for CL = 7 pF or CL = 12.5 pF
• Internal Power-On Reset (POR)
• Open-drain interrupt or clock output pins
• Programmable offset register for frequency adjustment

Applications:

• Time keeping application
• Battery powered devices
• Metering