Texas Instruments

BQ3285ESSTR

BQ3285ESSTR Description

The BQ3285ESSTR is a highly integrated Real-Time Clock (RTC) and Calendar IC designed by Texas Instruments. This device is engineered to provide accurate timekeeping and calendar functions in a variety of electronic systems. It features a parallel interface and is housed in a 24-lead SSOP package, making it suitable for surface-mount applications. The BQ3285ESSTR operates within a supply voltage range of 4.5V to 5.5V and can be powered by a backup battery with a voltage range of 2.5V to 4V. It is capable of maintaining timekeeping with a maximum current draw of 300µA at 5V, ensuring efficient power usage. The operating temperature range of 0°C to 70°C makes it suitable for a wide range of environmental conditions.

BQ3285ESSTR Features

The BQ3285ESSTR offers several advanced features that enhance its functionality and versatility. Key features include:

• Alarm Functionality: The RTC includes an alarm feature that can be programmed to trigger at specific times, making it ideal for applications requiring scheduled events or reminders.
• Daylight Savings and Leap Year Support: The device automatically adjusts for daylight savings and leap years, ensuring accurate timekeeping over extended periods.
• NVSRAM: The BQ3285ESSTR includes 242 bytes of non-volatile static RAM (NVSRAM), allowing for the storage of critical data even in the event of power loss.
• Square Wave Output: The device provides a square wave output, which can be used for various timing and synchronization applications.
• Time Format Flexibility: The RTC supports both 12-hour and 24-hour time formats, accommodating different user preferences and system requirements.

BQ3285ESSTR Applications

The BQ3285ESSTR is well-suited for a variety of applications where accurate timekeeping and calendar functions are essential. Some specific use cases include:

• Embedded Systems: Ideal for embedded systems where precise timekeeping is required for logging events, scheduling tasks, and managing system operations.
• Consumer Electronics: Suitable for consumer electronics such as digital clocks, alarm clocks, and other time-sensitive devices.
• Industrial Applications: Can be used in industrial control systems where accurate timekeeping is necessary for process control and monitoring.
• Telecommunications: The BQ3285ESSTR can be employed in telecommunication equipment for maintaining accurate time references and scheduling maintenance activities.

Conclusion of BQ3285ESSTR

The BQ3285ESSTR is a robust and versatile RTC and Calendar IC that offers a comprehensive set of features for accurate timekeeping and data storage. Its support for daylight savings, leap year adjustments, and NVSRAM make it a reliable choice for applications requiring long-term accuracy and data retention. The device's parallel interface and surface-mount package ensure ease of integration into various electronic systems. While the product is now obsolete, its legacy continues to influence the design of modern RTC solutions. For applications requiring a reliable and feature-rich RTC, the BQ3285ESSTR remains a noteworthy option.