AB0803-T3

Overview

The Abracon AB0803-T3 is a real-time clock (RTC) integrated circuit designed for precise timekeeping and calendar functions. It features a 16-pin VFQFN exposed pad package with dimensions of 3x3 mm. The device supports I2C 2-Wire Serial interface communication and includes 64 bytes of SRAM. Operating voltage ranges from 1.7V to 3.6V, with battery supply support between 1.5V and 3.6V. Timekeeping current consumption varies from 0.17µA to 0.22µA at 1.8V to 3V. It operates within a temperature range of -40°C to 85°C and includes features such as alarm, leap year correction, and trickle charging.

Feature Summary

• Integrated 64-byte SRAM for data storage
• I2C 2-Wire Serial interface for communication
• Trickle-charger capability for battery backup
• Alarm and Leap Year correction functions

Applications

• Battery-powered handheld devices
• Smart grid meters and utility meters
• Wireless sensors and tags
• Medical electronics and patient monitoring systems
• Data loggers and general consumer electronics

Procurement Notes

Verify the specific package variant (Tape & Reel or Cut Tape) required for the assembly process. Confirm that the 16-QFN (3x3) footprint matches the PCB design. Ensure the operating voltage range of 1.7V to 3.6V aligns with the system power rails. Check if the 64-byte SRAM capacity meets the application's data logging requirements.

Selection Notes

Select this component when ultra-low power consumption is critical, specifically noting the 0.17µA to 0.22µA timekeeping current. The 16-pin QFN package suits space-constrained designs. Verify compatibility with the host microcontroller's I2C bus speed. Consider the trickle-charger feature if external battery management is needed.

Part Context

The AB0803-T3 belongs to Abracon's AB series of real-time clocks, which are characterized by ultra-low power consumption and compact packaging. This series targets applications where power efficiency and small form factors are prioritized. The T3 suffix typically indicates the tape and reel packaging option, suitable for automated surface-mount assembly.

Replacement Considerations

Check for pin-to-pin compatible RTCs with similar I2C interfaces and low power specs. Verify if alternative parts offer sufficient SRAM size and compatible voltage ranges. Ensure replacement components meet the same -40°C to 85°C operating temperature requirements.