MAX31328
RECOMMENDED FOR NEW DESIGNS±3.5ppm, I2C RTC with Integrated Crystal and Power Management
Industry's Most accurate Crystal Based Temperature-Compensated RTC with small 5mmx5mm LGA package
- Part Models
- 2
- 1ku List Price
- Starting From $2.02
Overview
- Highly Accurate RTC with Integrated crystal Resonator Completely Manages All Timekeeping Functions
- Complete Clock Calendar Functionality Including Seconds, Minutes, Hours, Day, Date, Month, Year, and Century with Leap-Year Compensation Up to Year 2100
- Low Timekeeping Battery Current of 660nA
- Timekeeping Accuracy ±3.5ppm (±0.302 second/day) from -40°C to 85°C
- Two Time-of-Day Alarms
- Temperature-Compensated Programmable Square-Wave Output
- Register for Aging Trim
- Active-low RST Output/Pushbutton Reset Debounce Input
- Digital Temperature Sensor with ±3°C Accuracy
- +2.3V to +5.5V Supply Voltage
- Simple Serial Interface Connects to Most Microcontrollers
- I2C Interface (400kHz)
- Battery-Backup Input for Continuous Timekeeping
- Low-Power Operation Extends Battery-Backup Runtime
- 3.3V Operation
- Operating Temperature Range: -40°C to 85°C
- 5mm x 5mm, 10-Pin LGA Package
The MAX31328 is a low-cost, extremely accurate, I2C real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The device incorporates a battery input and maintains accurate timekeeping when main power to the device is interrupted. The integration of the crystal resonator enhances the long-term accuracy of the device and eliminates the external crystal requirement in the system. The MAX31328 is available in a 10-pin LGA package.
The RTC maintains seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either 24-hour or 12-hour format with an AM/PM indicator. Two programmable time-of-day alarms and a programmable square-wave output are provided. Address and data are transferred serially through an I2C bidirectional bus. A precision temperature-compensated voltage reference and comparator circuit monitors the status of VCC to detect power failures and automatically switch to the backup supply when necessary. Additionally, the active-low RST pin is monitored as a pushbutton input for generating a microprocessor reset.
Applications
- Global Positioning System
- Power Meters
- Servers
- Telematics
Documentation
Data Sheet 1
User Guide 1
Video 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX31328NELB+ | 10-LGA-5X5X1.25 | ||
| MAX31328NELB+T | 10-LGA-5X5X1.25 |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareTools & Simulations
Software Development 1
IBIS Model 1
Evaluation Kits
Evaluation Kit for the MAX31328