AB0811-T3

Overview

The Abracon AB0811-T3 is a Real Time Clock (RTC) integrated circuit designed for precise timekeeping and calendar functions. It features an SPI 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 maintains time in HH:MM:SS format and dates in YY-MM-DD-dd format. Key electrical characteristics include a maximum current consumption of 0.22µA at 3V during timekeeping. It is housed in a 16-VFQFN Exposed Pad package (16-QFN 3x3) and supports an operating temperature range of -40°C to 85°C.

Feature Summary

• Integrated Alarm and Leap Year compensation capabilities
• Built-in Trickle-Charger function for backup power management
• SPI serial interface for data communication
• Low power consumption: 0.17µA ~ 0.22µA @ 1.8V ~ 3V

Applications

• Portable electronic devices requiring accurate timekeeping
• Industrial systems needing calendar tracking
• Battery-powered equipment utilizing trickle-charge maintenance

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package type variations such as Tape & Reel or Cut Tape. Ensure the selected variant matches the required surface mount configuration for the 16-VFQFN Exposed Pad footprint. Confirm voltage supply compatibility with the target system's 1.7V to 3.6V operational range before procurement.

Selection Notes

Select this component when an SPI interface is preferred over I²C for RTC functionality. Ensure the design accommodates the 16-QFN (3x3) package dimensions. Verify that the application requires the specific alarm and leap year features provided by the AB08X5 series architecture. Check that the operating environment stays within the -40°C to 85°C temperature limits.

Part Context

The AB0811-T3 belongs to the Abracon RTC family, distinguished by its SPI interface compared to other variants like the AB0801 which uses I²C. It shares core functionalities such as calendar tracking and low-power operation with similar models but offers different connectivity options suitable for specific microcontroller interfaces.

Replacement Considerations

Direct replacements must match the 16-VFQFN package and SPI interface. Models like the AB0815-T3 offer similar RTC functions but utilize an I²C interface, requiring schematic modifications. Verify pinout compatibility and voltage ranges when substituting with other Abracon RTC ICs.