BQ4845YS-A4NTR

Product Overview

Category

BQ4845YS-A4NTR belongs to the category of integrated circuits (ICs).

Use

This product is commonly used as a real-time clock (RTC) and calendar module in various electronic devices.

Characteristics

• The BQ4845YS-A4NTR is a highly accurate and reliable RTC module.
• It offers low power consumption, making it suitable for battery-powered devices.
• The module provides precise timekeeping and calendar functions.
• It has a wide operating voltage range, allowing compatibility with different systems.
• BQ4845YS-A4NTR features non-volatile memory, ensuring data retention during power loss.

Package

The BQ4845YS-A4NTR module comes in a compact surface-mount package, which facilitates easy integration into electronic circuit boards.

Essence

The essence of BQ4845YS-A4NTR lies in its ability to provide accurate timekeeping and calendar functionality, enhancing the overall performance of electronic devices.

Packaging/Quantity

This product is typically packaged in reels or tubes, containing a specific quantity of modules per package. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Supply Voltage: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Timekeeping Accuracy: ±2 minutes per month at 25°C
• Clock Frequency: 32.768 kHz
• Memory: Non-volatile RAM for data storage

Detailed Pin Configuration

The BQ4845YS-A4NTR module has the following pin configuration:

1. VCC: Power supply input
2. GND: Ground connection
3. SDA: Serial Data Line for communication
4. SCL: Serial Clock Line for synchronization
5. X1: Crystal oscillator input
6. X2: Crystal oscillator output
7. VBAT: Backup battery input for data retention during power loss

Functional Features

• Real-time clock with calendar functions
• Automatic leap year compensation
• Alarm and timer functionality
• Programmable square wave output
• Battery backup for data retention during power loss
• I2C interface for communication with the host system

Advantages and Disadvantages

Advantages

• High accuracy timekeeping
• Low power consumption
• Wide operating voltage range
• Compact package for easy integration
• Non-volatile memory for data retention

Disadvantages

• Limited memory capacity
• Requires an external crystal oscillator for clock generation

Working Principles

The BQ4845YS-A4NTR module utilizes a combination of an internal clock circuit, non-volatile memory, and an I2C interface to provide accurate timekeeping and calendar functions. The crystal oscillator generates a precise clock signal, which is used to maintain the current time and date. The module communicates with the host system through the I2C interface, allowing for configuration and retrieval of time-related information.

Detailed Application Field Plans

The BQ4845YS-A4NTR module finds applications in various electronic devices that require accurate timekeeping and calendar functionality. Some common application fields include:

1. Consumer Electronics: Used in digital watches, alarm clocks, and home appliances.
2. Automotive: Integrated into car dashboards for displaying time and date.
3. Industrial Automation: Employed in programmable logic controllers (PLCs) for time-based operations.
4. Medical Devices: Utilized in medical equipment for scheduling and timing functions.
5. Communication Systems: Integrated into network infrastructure equipment for synchronization purposes.

Detailed and Complete Alternative Models

1. DS3231 - Real-Time Clock Module with I2C Interface
2. PCF8563 - Low Power Real-Time Clock Module
3. MCP7940N - I2C Real-Time Clock/Calendar with SRAM

These alternative models offer similar functionality to the BQ4845YS-A4NTR and can be considered as alternatives based on specific requirements.

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