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Product Detailed Parameters
- Description：IC RTC CLK/CALENDAR SPI 16QFN
- Series：-
- Package：Tape & Reel (TR),Cut Tape (CT)
- Mfr：Abracon LLC
- Type：Clock/Calendar
- Features：Alarm, Leap Year, SRAM, Trickle-Charger, Watchdog Timer
- Memory Size：256B
- Time Format：HH:MM:SS:hh
- Date Format：YY-MM-DD-dd
- Interface：SPI
- Voltage - Supply：1.7V ~ 3.6V
- Voltage - Supply, Battery：1.5V ~ 3.6V
- Current - Timekeeping (Max)：0.17µA ~ 0.22µA @ 1.8V ~ 3V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
- Package / Case：16-VFQFN Exposed Pad
- Supplier Device Package：16-QFN (3x3)
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Overview
The Abracon AB0815-T3 is a Real Time Clock (RTC) integrated circuit designed for precise timekeeping and calendar functions. It features an SPI serial interface and includes 256 bytes of SRAM for data storage. The device supports HH:MM:SS:hh time format and YY-MM-DD-dd date format, with built-in alarm, leap year compensation, trickle charger, and watchdog timer capabilities. Operating on a supply voltage of 1.7V to 3.6V, it maintains timekeeping current between 0.17µA and 0.22µA at 1.8V to 3V. Packaged in a 16-VFQFN Exposed Pad (3x3 mm) case, it operates within a temperature range of -40°C to 85°C.
Feature Summary
- SPI Interface: Serial communication protocol for efficient data transfer.
- Integrated Memory: 256B SRAM for user data retention.
- Advanced Features: Includes alarm, leap year correction, trickle charger, and watchdog timer.
- Low Power Consumption: Timekeeping current of 0.17µA ~ 0.22µA @ 1.8V ~ 3V.
Applications
- Portable electronic devices requiring accurate timekeeping.
- Data logging systems needing non-volatile time stamps.
- Battery-powered IoT sensors utilizing low standby current.
Procurement Notes
Verify the package type matches the required 16-VFQFN Exposed Pad form factor. Confirm that the system design supports the SPI interface protocol rather than I2C. Ensure the operating voltage range of 1.7V to 3.6V aligns with the target application's power supply constraints.
Selection Notes
Select this component when an SPI interface is preferred over I2C for RTC functionality. The 256-byte SRAM provides ample space for general-purpose data storage alongside timekeeping. The wide operating temperature range makes it suitable for industrial or outdoor environments where temperatures may drop below freezing.
Part Context
This part belongs to the Abracon LLC Real Time Clock category. It is distinct from other RTC models by its specific use of the SPI interface and the inclusion of a watchdog timer and trickle charger within a compact 3x3 mm QFN package.
Replacement Considerations
Check for compatible SPI-based RTC ICs with similar voltage ranges and memory sizes. Verify pinout compatibility if direct replacement is intended, as package dimensions and exposed pad configurations must match the existing PCB footprint.
