ADI Maxim MAX31329 Low-Current RTC with Integrated Crystal
The MAX31329 low-current, real-time clock (RTC) is a timekeeping device that provides timekeeping current in nanoamperes, thus extending battery life. The MAX31329 incorporates an integrated 32.768kHz crystal, which eliminates the need for an external crystal. This device is accessed through an I2C serial interface. The MAX31329 features one digital Schmitt trigger input (DIN) and generates an interrupt output on a falling or rising edge of this digital input. An integrated power-on reset function ensures deterministic default register status upon power-up. Other features include two time-of-day alarms, interrupt outputs, a programmable square-wave output, and a serial bus timeout mechanism.
Part no.: MAX31329ELB+
Key features
- Increases Battery Life
- 240nA Timekeeping Current
- Trickle Charger for External Supercapacitor or Rechargeable Battery
- Provides Flexible Configurability
- A Schmitt Trigger Input for Event Detection
- Programmable Square-Wave Output for Clock Monitoring
- Two Interrupt Pins for Multiple Wakeup Configurations
- Clock Input Pin for External Clock Synchronization
- Saves Board Space
- Integrated Crystal and Load Capacitors Tuned to ±5ppm Typical Clock Accuracy
- 5mm x 5mm, 10-Pin LGA Package
- Value-Added Features for Ease-of-Use
- +1.6V to +5.5V Operating Voltage Range
- Two Time-of-Day Alarms
- Countdown Timer with Repeat and Pause Functions
- 64-Byte RAM for User Data Storage
- Integrated Protection
- Power-on Reset for Default Configuration
- Automatic Switchover to Backup Battery or Supercapacitor on Power-Fail
- Lockup-Free Operation with Bus Timeout
Applications
- Industrial Equipment
- Test and Measurement Equipment
- Energy Meters
- Medical Device
- Portable Instruments
- Factory Automation
- IoT Devices
- Surveillance Cameras
- Servers
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