BQ4845S-A4NTRG4 Product Details

Product Specifications

The BQ4845S-A4NTRG4 is an advanced Real-Time Clock (RTC) module that integrates essential timekeeping features with a battery-backed SRAM, offering an all-in-one solution for applications needing accurate time tracking and data retention. Its specifications are tailored to meet the needs of sophisticated electronic systems:

• Timekeeping Accuracy: Features a high-precision crystal oscillator to ensure accurate time and date management.

• Power Supply Voltage: Operates on a 4.5V to 5.5V supply voltage, fitting seamlessly into 5V logic systems.

• Temperature Range: Reliable across a broad temperature spectrum from -40°C to +85°C, accommodating diverse operating conditions.

• Memory: Incorporates integrated battery-backed SRAM, safeguarding data during power losses.

• Interface: Comes with a parallel interface for straightforward integration with microprocessors.

• Package Type: Delivered in a 28-pin SOIC package, supporting easy incorporation into various system layouts.

• Additional Features: Outfitted with automatic power-fail detection, battery switch-over, programmable alarms, and a watchdog timer, enhancing both functionality and reliability.

Product Introduction

The BQ4845S-A4NTRG4 RTC module distinguishes itself through its ability to maintain accurate timekeeping and ensure data integrity via its integrated SRAM, backed up by a battery. This module is crucial for applications where data loss during power failures is unacceptable, including critical data logging and time-sensitive processes. Its additional capabilities, like programmable alarms and a watchdog timer, make it adaptable to a wide array of applications, providing flexibility and ensuring stability across computing, industrial automation, telecommunications, medical devices, and automotive systems.

Application Scope

This RTC module is ideally suited for a variety of sectors:

• Computing: Critical for servers, personal computers, and networking devices, ensuring accurate system time and retaining configuration data.

• Industrial Automation: Ideal for control systems, monitoring equipment, and data loggers that require reliable operation and data preservation.

• Telecommunications: Essential for network infrastructure, offering accurate time-stamping and operational log maintenance.

• Medical Devices: Important in medical monitoring and diagnostic systems, where precise timing and reliable data storage are crucial.

• Automotive Electronics: Appropriate for navigation systems, telematics, and event data recording systems reliant on precise timekeeping and data logging.

Frequently Asked Questions

Q: How does the BQ4845S-A4NTRG4 manage power outages?

A: It automatically switches to battery backup to continue clock functions and protect SRAM contents, ensuring continuous operation and data preservation.

Q: What is the purpose of the programmable alarms?

A: Programmable alarms can be configured to trigger specific tasks or act as reminders at pre-set times, facilitating efficient system management and operation.

Q: Can the watchdog timer in the BQ4845S-A4NTRG4 be customized?

A: Yes, the watchdog timer is adjustable or can be disabled to fit specific application needs, adding a layer of customization in system design.