RTC real time clock module PCF8523 - STEMMA QT / Qwiic - Adafruit 5189

Index: ADA-20176 EAN: 5904422348892
A real-time clock (RTC) module manufactured by Adafruit and featuring the PCF8523 chip. It is also a calendar optimized for low power consumption. Data is transmitted serially over the I2C bus with a maximum baud rate of up to 1000 kbit/s. The RTC PCF8523 real time clock module is also equipped with a battery socket. Thanks to the battery, the power supply is maintained even if the main power supply to the device is interrupted.
RTC real time clock module PCF8523 - STEMMA QT / Qwiic - Adafruit 5189
€6.90
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Manufacturer: Adafruit
Compatibility: Arduino Raspberry Pi

Product description: RTC real time clock module PCF8523 - STEMMA QT / Qwiic - Adafruit 5189

A real time clock (RTC) module manufactured by Adafruit and featuring the PCF8523 chip. It is also a calendar optimized for low power consumption. Data is transmitted serially over the I2C bus with a maximum baud rate of up to 1000 kbit/s. The RTC PCF8523 real time clock module is also equipped with a battery socket. Thanks to the battery the power supply is maintained even if the main power supply to the device is interrupted.

The kit does not include CR1220 battery. It should be purchased separately.

Moduł z zegarem czasu rzeczywistego RTC wyposażony w złącze bateryjne.

Real time clock RTC module equipped with battery connector.

Features of Adafruit module

The PCF8523 Real-Time Clock RTC module features a battery connector, allowing the RTC to maintain timing accuracy even when the main power to the device is interrupted. The module provides information such as seconds, minutes, hours, day, week, month and year. The clock operates in 24-hour or 12-hour format with AM / PM indicator. However, it is not a highly accurate module - it can achieve a delay of up to 2 seconds in a single day of operation.

Applications and suggested use

  • Event reminder
  • External MCU wake-up source

Description of module pinouts

  • VIN - power supply
  • GND - ground
  • SCL - I2C data line
  • SDA - I2C clock line

Manufacturer provides detailed user guide for RTC module with example code and connection instructions.

Przykład podłączenia do mikrokontrolera


Example of connection to the board.

Moduł z zegarem czasu rzeczywistego RTC PCF8523.

ThePCF8523 real-time clock module RTC.

RTC module specification

  • Supply voltage: from 3 V to 5 V
  • Communication interface: I2C bus
  • I2C address: 0x68
  • Data resolution: from seconds to years
  • Product size: 22.5 x 21 mm

Set contents

  • RTC real time clock module PCF8523 - STEMMA QT / Qwiic - 1 pc.
  • Raster 2.544 mm goldpin strip for self-soldering - 1 pc.
Sensor - type RTC
Package width 7.6 cm
Package height 12 cm
Package depth 0.5 cm
Package weight 0.004 kg

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Product reviews

RTC real time clock module PCF8523 - STEMMA QT / Qwiic - Adafruit 5189

5/5

Average grade

2

Customers opinion
The following opinions are collected
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and come from the post-purchase process.
Patrick 20.11.2023 Confirmed purchase Translated review
Good quality as expected
Jakub W. 29.03.2022 Confirmed purchase Translated review
Cool clock. Everything works :)

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