Texas Instruments

BQ4285S-SB2

BQ4285S-SB2 Description

The BQ4285S-SB2 is a highly integrated Real-Time Clock (RTC) and Calendar IC designed by Texas Instruments. This component is part of the Clock/Timing ICs category and offers a comprehensive set of features for timekeeping and data storage applications. Despite being marked as obsolete, the BQ4285S-SB2 remains a reliable choice for systems requiring precise timekeeping and non-volatile memory.

The BQ4285S-SB2 operates within a temperature range of 0°C to 70°C, making it suitable for a variety of industrial and commercial environments. It is designed for surface-mount applications, ensuring ease of integration into compact and space-constrained designs. The device is housed in a tube package and features a parallel interface, facilitating straightforward communication with host systems.

BQ4285S-SB2 Features

The BQ4285S-SB2 boasts several unique features that enhance its functionality and reliability:

• Clock and Calendar Functions: The BQ4285S-SB2 maintains time in HH:MM:SS format, supporting both 12-hour and 24-hour formats. It also includes day, date, month, and year tracking, with automatic leap year compensation.
• Alarm Functionality: The device supports alarm functions, allowing for precise scheduling and event triggering.
• Daylight Savings Adjustment: The BQ4285S-SB2 can automatically adjust for daylight savings, ensuring accurate timekeeping throughout the year.
• Non-Volatile Static RAM (NVSRAM): With 114 bytes of memory, the BQ4285S-SB2 provides ample space for data storage, ensuring critical information is retained even during power loss.
• Square Wave Output: The device offers a square wave output, which can be used for various timing applications.
• Supply Voltage Range: The BQ4285S-SB2 operates on a supply voltage range of 4.5V to 5.5V, with an additional battery backup voltage range of 2.5V to 4V, ensuring reliable operation even during power outages.
• Compliance and Standards: The BQ4285S-SB2 is REACH unaffected and RoHS3 compliant, meeting stringent environmental and safety standards.
• Moisture Sensitivity Level: The device has an MSL of 1 (unlimited), indicating it is not sensitive to moisture, which is beneficial for long-term storage and reliability.

BQ4285S-SB2 Applications

The BQ4285S-SB2 is ideal for a range of applications where accurate timekeeping and reliable data storage are crucial:

• Industrial Control Systems: The BQ4285S-SB2 can be used in industrial control systems to log events and maintain accurate time records.
• Telecommunications: In telecom applications, the device can help in maintaining precise time synchronization for network operations.
• Consumer Electronics: The BQ4285S-SB2 is suitable for consumer electronics such as digital clocks, alarm systems, and home automation devices.
• Medical Devices: The device's reliability and compliance make it suitable for medical devices that require accurate timekeeping and data logging.
• Automotive Systems: The BQ4285S-SB2 can be used in automotive systems for event logging and time synchronization.

Conclusion of BQ4285S-SB2

The BQ4285S-SB2 from Texas Instruments is a robust and feature-rich RTC and Calendar IC that offers precise timekeeping, extensive memory storage, and a range of useful functionalities. Despite being marked as obsolete, its reliability, compliance with industry standards, and comprehensive feature set make it a valuable component for various applications. The BQ4285S-SB2 is particularly well-suited for industrial, telecommunications, consumer electronics, medical, and automotive applications where accurate timekeeping and data retention are essential.