Analog Devices / Maxim Integrated MAX31331 Ultra-Low-Power I2C Real-Time Clock

Analog Devices MAX31331 Ultra-Low-Power I²C Real-Time Clock consumes a nominal 65nA timekeeping current, extending battery life. Analog Devices MAX31331 supports a wide range of 32.768kHz crystals. A crystal with any capacitive loading (CL) spec can be used. This feature broadens the pool of usable crystals for this device. The MAX31331 is accessed through an I²C serial interface.

Features

Ultra-low-power extends run time
- 65nA timekeeping current
- 1.1V to 5.5V timekeeping voltage range
- Automatic switchover to backup supply on power fail event
- Trickle charger for external supercapacitor or rechargeable battery
Provides flexibility
- Wide range of external crystals supported (no external loading required)
- Frequency correction with <0.5ppm resolution
- 1.62V to 5.5V interface voltage range

Small footprint and low BOM
- 1.66mm x 1.26mm 12-bump WLP
- 3mm x 3mm 10-pin TDFN
- No external load capacitors required
Value-added features for ease of use
- Event detection with dedicated Pin
- Timestamps for various events
- Low battery voltage detection
- 1/128 second register
- Alarms and countdown timer
- 32-byte user RAM

Applications

Medical
Wearables
Portable instruments

Telematics
Industrial
IoT

Analog Devices / Maxim Integrated MAX31331 Ultra-Low-Power I2C Real-Time Clock

Features

Applications

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