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Product Detailed Parameters
- Description：IC RTC CLK/CALENDAR I2C 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：I2C, 2-Wire Serial
- 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 AB0805-T3 is a Real Time Clock (RTC) integrated circuit designed for precise timekeeping and calendar functions. It features an I2C, 2-Wire Serial interface and operates within a supply voltage range of 1.7V to 3.6V, with battery backup support from 1.5V to 3.6V. The device includes 256 bytes of SRAM memory and supports HH:MM:SS:hh time format and YY-MM-DD-dd date format. Key functional blocks include alarm capabilities, leap year compensation, a trickle charger, and a watchdog timer. It is housed in a compact 16-VFQFN Exposed Pad package (3x3 mm) suitable for surface mount applications.
Feature Summary
- Integrated 256-byte SRAM for data storage
- Supports Alarm, Leap Year, Trickle-Charger, and Watchdog Timer functions
- Low power consumption: 0.17µA ~ 0.22µA @ 1.8V ~ 3V during timekeeping
Applications
- Portable electronic devices requiring accurate timekeeping
- Battery-powered systems utilizing trickle charging
- Industrial equipment needing watchdog timer protection
Procurement Notes
Verify the specific ordering suffix '-T3' corresponds to the required tape and reel or cut tape packaging configuration before procurement. Confirm that the 16-VFQFN exposed pad footprint matches the target PCB layout design specifications.
Selection Notes
Select this component when a low-profile 16-pin QFN package is required alongside integrated SRAM and watchdog functionality. Ensure the system voltage remains within the 1.7V to 3.6V operating range and that I2C bus compatibility is maintained with the host controller.
Part Context
This part belongs to the Abracon RTC family, specifically utilizing the 16-VFQFN package variant. It serves as a dedicated clock/calendar solution distinct from general-purpose oscillators, focusing on time management and peripheral control features like alarms and timers.
Replacement Considerations
Check pin-to-pin compatibility with other 16-QFN RTC ICs offering similar I2C interfaces and voltage ranges. Verify if alternative parts support the same 256B SRAM size and feature set including trickle charging and watchdog timers.
