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Adafruit RV-8803 High Accuracy Real Time Clock Breakout Board - STEMMA QT / Qwiic
For excellent accuracy time-keeping - when your everyday RTC (Real Time Clock) won't do - the Adafruit RV-8803 Precision Real Time Clock Breakout Board is a tick-tock above the rest with excellent ±1.5 ppm (at 0~50°C) accuracy. Thanks to the built-in crystal with temperature compensation management, classic RTC drift is minimized so you don't have to do any time correction with WiFi or GPS to keep current. Compare it to the popular DS3231, with ±2 ppm (0~40°C), you get even tighter spec'd performance, at a better price!
This is a great battery-backed real time clock (RTC) that allows your microcontroller project to keep track of time even if it is reprogrammed, or if the power is lost. Perfect for data-logging, clock-building, time stamping, timers, and alarms, etc. Equipped with RV-8803 RTC - it can run from 3.3V or 5V power & logic - and keep excellent time with under 50 seconds of drift over a whole year.
There's also some nifty extras like square-wave out, timer alarm, event timestamping (you can use the built in button to activate an event, or use the breakout pads)
Works great with an Arduino using our RTC library, with CircuitPython, or with a Raspberry Pi (or similar single board linux computer) thanks to built-in kernel support.
Specifications
- Factory calibrated temperature compensation
- Very high Time Accuracy (best in class).
- ±1.5 ppm 0 to +50°C
- ±3.0 ppm -40 to +85°C
- ±7.0 ppm +85 to +105°C
- Low power consumption: 240 nA @ 3 V. (best in class)
- Wide operating voltage range: 1.5 V to 5.5 V.
- Aging compensation with OFFSET value
- Counters for hundredths of seconds, seconds, minutes, hours, date, month, year and weekday
- I²C-bus interface (up to 400 kHz)
- Periodic Countdown Timer Interrupt function
- Periodic Time Update Interrupt function (seconds, minutes)
- Alarm Interrupts for weekday or date, hour and minute settings
- External Event Input with Interrupt and Time Stamp function
- Programmable Clock Output for peripheral devices (32.768 kHz, 1024 Hz, 1 Hz) with enable/disable function (CLKOE)
- Operating temperature range: -40 to +105°C
- Ultra small and compact C7 package size,
- Register compatible with Epson RX-8803SA/LC
- Product Dimensions: 25.4mm x 17.7mm x 7.9mm / 1.0" x 0.7" x 0.3"
- Product Weight: 2.2g / 0.1oz
Package Includes
- 1x Adafruit RV-8803 High Accuracy Real Time Clock Breakout Board - STEMMA QT / Qwiic
