PCF2123 Overview
Key Specifications
Package: TSSOP
Mount Type: Surface Mount
Pins: 14
Operating Voltage: 2 V
Description
The PCF2123 is a CMOS1 Real-Time Clock (RTC) and calendar optimized for low power applications. Data is transferred serially via a Serial Peripheral Interface (SPI-bus) with a maximum data rate of 6.25 Mbit/s.
Key Features
- Real time clock provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal
- Low backup current while running: typical 100 nA at VDD = 2.0 V and Tamb = 25 °C
- Resolution: seconds to years
- Watchdog functionality
- Freely programmable timer and alarm with interrupt capability
