BQ4845S-A4G4 Product Details

Product Specifications

The BQ4845S-A4G4 is a highly integrated Real-Time Clock (RTC) module, providing comprehensive timekeeping capabilities along with additional features to ensure data integrity and system reliability. It encompasses several key features:

• Timekeeping Accuracy: Features a high-accuracy crystal oscillator to maintain precise time and date information.

• Power Supply Voltage: Operates across a 4.5V to 5.5V range, making it compatible with a variety of 5V systems.

• Temperature Range: Functions reliably within a -40°C to +85°C temperature range, catering to a wide array of environmental conditions.

• Memory: Includes integrated battery-backed non-volatile (NV) RAM for data preservation during power outages.

• Interface: Equipped with a parallel interface for straightforward communication with microprocessors.

• Package Type: Available in a 28-pin SOP package, offering compatibility with standard board layouts.

• Additional Features: Boasts power-fail detection, automatic battery backup switching, programmable alarms, and a watchdog timer for enhanced system management.

Product Introduction

Designed to address the demands of sophisticated electronic systems, the BQ4845S-A4G4 RTC module ensures accurate timekeeping, data retention, and system stability through power disruptions. The integrated battery-backed NV RAM is crucial for applications where maintaining data integrity during power failures is paramount. With its programmable alarms and watchdog timer, the BQ4845S-A4G4 supports complex system functionalities, making it a versatile choice for a broad spectrum of applications, including computing, telecommunications, industrial control, medical devices, and automotive systems.

Application Scope

The versatility of the BQ4845S-A4G4 makes it suitable for a wide range of applications:

• Computing: Critical for ensuring accurate timekeeping and system integrity in servers, desktop computers, and networking devices.

• Industrial Automation: Ideal for use in automation systems, monitoring devices, and data loggers that require reliable operation and data preservation.

• Telecommunications: Employed in communication infrastructure for precise time-stamping, system logging, and reliability monitoring.

• Medical Equipment: Essential in medical monitoring and diagnostic equipment where accurate timing and data integrity are paramount.

• Automotive Electronics: Applicable in navigation systems, telematics, and other in-vehicle electronics that rely on precise timekeeping and data logging.

Frequently Asked Questions

Q: How does the BQ4845S-A4G4 manage power failures?

A: It seamlessly switches to battery backup to maintain clock functionality and protect NV RAM contents, ensuring data preservation and continuous operation.

Q: What are the programmable alarms used for?

A: Programmable alarms can be set for specific dates and times to trigger system actions or reminders, facilitating scheduled events or checks without continuous CPU involvement.

Q: Can the watchdog timer be customized in the BQ4845S-A4G4?

A: Yes, the watchdog timer can be adjusted or disabled to suit particular application requirements, offering an added layer of system design flexibility.