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Manufacturer Part #


PCF8523 Series 5.5 V 1 Mbps I2C Interface Real Time Clock / Calendar - SOIC-8

Product Specification Section
Technical Attributes
Attributes Table
Date Format: DW:DM:M:Y/Binary
Time Format: HH:MM:SS/Binary
Interface: I2C
Supply Voltage-Nom: 1.6V to 5.5V
Temperature Grade: Industrial
Operating Temp Range: -40°C to +85°C
Storage Temperature Range: -65°C to +150°C
Package Style:  SOIC-8
Mounting Method: Surface Mount
Features & Applications

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


  • 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


  • Time keeping application
  • Battery powered devices
  • Metering
Pricing Section
Web Price:
$1.27 USD Each
Cost Per Unit

$7.00 reeling fee is amortized over the number of components for each reel.
Mini-Reels are a custom product and are non-cancelable and non-returnable.