MAX31342
Low-Current, Real-Time Clock with I2C Interface
World's smallest RTC in WLP
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Overview
Features and Benefits
- Increases Battery Life
- 150nA Timekeeping Current
- Wide Range of External Crystals with CL = 6pF and ESR up to 100kΩ for Minimal Current Draw
- Provides Flexible Configurability
- Programmable Square Wave Output for Clock Monitoring
- Saves Board Space
- Integrated Load Capacitors for Crystal Oscillator
- 1mm x 2mm, 8-Bump WLP with 0.5mm Pitch
- Value Add Features for Ease of Use
- +1.6V to +3.6V Operating Voltage Range
- Countdown Timer with Repeat Function
- Integrated Protection
- Power-On Reset for Default Configuration
- Lockup-Free Operation with Bus Timeout
Product Details
The MAX31342 low-current, real-time clock (RTC) is a time-keeping device that provides an extremely low time-keeping current, permitting longer life from a power supply. The MAX31342 supports 6pF high-ESR crystals, which broaden the pool of usable crystals for the devices. This device is accessed through an I2C serial interface. 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. The clock/calendar provides 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 24-hour mode. The MAX31342 also includes an input for synchronization. When a reference clock (e.g., 32kHz, 50Hz/60Hz Power Line, GPS 1PPS) is present at the CLKIN pin and the enable external clock input bit (ECLK) is set to 1, the MAX31342 RTC is frequency-locked to the external clock and the clock accuracy is determined by the external source.
The device is available in lead(Pb)-free/RoHS-compliant, 8-pin wafer-level package (WLP) 1mm x 2mm package with 0.5mm pitch. The device supports the -40°C to +85°C extended temperature range.
Applications
- Medical
- Point-of-Sale (POS)
- Portable Audio
- Portable Instruments
- Power Meters
- Telematics
- Wearables
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
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MAX31342 Reliability Data10/10/2022PDF114K
Design Resources
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.
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Evaluation Boards
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.