Texas Instruments

BQ4845S-A4NTRG4

BQ4845S-A4NTRG4 Description

The BQ4845S-A4NTRG4 is a high-performance Real Time Clock (RTC) and Calendar IC designed by Texas Instruments. This device is part of the BQ4845 family and is specifically tailored for applications requiring precise timekeeping and calendar functions. The BQ4845S-A4NTRG4 operates with a supply voltage range of 4.75V to 5.5V and features a maximum timekeeping current of 1.5mA at a typical operating voltage between 4.5V and 5.5V. It supports a battery backup supply voltage range of 2.3V to 4V, ensuring reliable operation even during power outages.

The BQ4845S-A4NTRG4 is housed in a 28-pin SOIC package and is available in a Tape & Reel (TR) format, making it suitable for surface mount applications. It is classified under the HTSUS code 8542.39.0001 and has a Moisture Sensitivity Level (MSL) of 1, indicating it is suitable for unlimited exposure to moisture. The device is REACH unaffected and ROHS3 compliant, adhering to stringent environmental regulations.

BQ4845S-A4NTRG4 Features

The BQ4845S-A4NTRG4 offers a comprehensive set of features that enhance its functionality and versatility. Key features include:

• Alarm Functionality: The device supports an alarm feature, allowing users to set specific times for alerts.
• Daylight Savings Adjustment: It includes an automatic daylight savings adjustment feature, simplifying time management across different time zones.
• Leap Year Compensation: The BQ4845S-A4NTRG4 automatically compensates for leap years, ensuring accurate date calculations over extended periods.
• Supervisor and Watchdog Timer: These features provide system monitoring and reset capabilities, enhancing system reliability and stability.
• Parallel Interface: The device communicates via a parallel interface, facilitating straightforward integration with various systems.
• 12/24 Hour Time Format: It supports both 12-hour and 24-hour time formats, offering flexibility in time representation.

BQ4845S-A4NTRG4 Applications

The BQ4845S-A4NTRG4 is ideal for a wide range of applications where accurate timekeeping and calendar functions are essential. Some specific use cases include:

• Consumer Electronics: Ideal for devices such as digital clocks, alarm clocks, and home automation systems where precise timekeeping is crucial.
• Industrial Control Systems: Suitable for monitoring and control systems that require accurate time-stamping of events and operations.
• Telecommunications: Useful in network management systems for logging and monitoring purposes.
• Medical Devices: Can be employed in medical equipment for accurate time and date recording, essential for compliance and data integrity.

Conclusion of BQ4845S-A4NTRG4

The BQ4845S-A4NTRG4 is a robust and versatile Real Time Clock and Calendar IC that offers a comprehensive set of features and benefits. Its support for alarm functions, daylight savings adjustments, leap year compensation, and supervisor capabilities make it a reliable choice for various applications. The device's compatibility with both 12-hour and 24-hour time formats and its parallel interface further enhance its flexibility. Despite being marked as obsolete, the BQ4845S-A4NTRG4 remains a valuable component for applications requiring precise timekeeping and calendar functions.