{"title":"Fermion: DS3232 Precise RTC (Breakout)","handle":"fermion-ds3232-precise-rtc-breakout","url":"/products/fermion-ds3232-precise-rtc-breakout","description":"A high-precision real-time clock (RTC) breakout board based on the DS3232 chip, featuring an integrated crystal resonator and temperature compensator. The DS3232 maintains accuracy of ±3.5ppm (±0.3 seconds/day) across the full operating range of -40°C to +85°C, making it ideal for applications that demand reliable, precise timekeeping.\n\nThe DS3232 integrates 236 bytes of battery-backed SRAM for data storage at extremely low power consumption, and maintains accurate timekeeping when main power is interrupted via a backup battery input. The module communicates over I2C and is compatible with 3.3V and 5V controllers.\n\nKey Features\n\n\n±3.5ppm Accuracy – ±0.3 seconds/day drift across -40°C to +85°C\n\nIntegrated Crystal Resonator – No external crystal needed, with temperature compensation\n\n236-Byte SRAM – Battery-backed storage for low-power data logging\n\nBattery Backup – Maintains timekeeping during power interruptions (CR1220 battery, not included)\n\nTwo Programmable Alarms – Time-of-day alarm outputs\n\nProgrammable Square Wave Output – Configurable frequency output\n\n12/24 Hour Format – With AM/PM indicator in 12-hour mode\n\nReset Pin – Can be used as a push-button input for microprocessor reset\n\n\nSpecifications\n\n\nChip – DS3232\n\nOperating Voltage – 3.3–5.5V\n\nI2C Address – 0x68\n\nSRAM – 236 bytes (0x14–0x1F)\n\nTiming Range – 1970–2100\n\nTiming Accuracy – ±3.5ppm (±0.3 sec/day)\n\nOperating Temperature – -40°C to +85°C\n\nBoard Dimensions – 22.5 × 21mm\n\n\nIdeal For\n\nIoT data collection and timestamping\nMCU external wake-up source\nPrecision clocks and alarm systems\nLow-power data logging with battery backup\n\n\nPackage Contents\n\n1× Fermion DS3232 Precise RTC Breakout\n1× 2.54mm 7-pin header\n\n\n\nNote: CR1220 backup battery is not included due to air cargo regulations. Please purchase locally.\n\n\nResources\n\nProduct Wiki (DFRobot)\n","vendor":"DFRobot","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":2607,"title":"Default Title","sku":"DF-DFR0821","price":20.34,"on_sale":false,"in_stock":true,"available_quantity":46,"option1":"Default Title"}]}