BQ4845YS-A4G4

Product Overview

Category

BQ4845YS-A4G4 belongs to the category of integrated circuits (ICs).

Use

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

Characteristics

• Low power consumption
• High accuracy timekeeping
• Small form factor
• Wide operating temperature range

Package

The BQ4845YS-A4G4 is available in a small outline integrated circuit (SOIC) package.

Essence

The essence of this product lies in its ability to accurately keep track of time and provide timing information to electronic systems.

Packaging/Quantity

The BQ4845YS-A4G4 is typically packaged in reels, with each reel containing a specific quantity of ICs. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Supply Voltage: 2.7V to 5.5V
• Timekeeping Accuracy: ±2 minutes per month
• Operating Temperature Range: -40°C to +85°C
• Clock Format: 24-hour or 12-hour with AM/PM indicator
• Battery Backup Voltage: 1.8V to 5.5V

Detailed Pin Configuration

The BQ4845YS-A4G4 has a total of 16 pins. Here is the detailed pin configuration:

1. VCC - Power supply voltage input
2. GND - Ground reference
3. SDA - Serial data input/output for communication
4. SCL - Serial clock input for communication
5. IRQ - Interrupt request output
6. SQW - Square wave output
7. X1 - Crystal oscillator input
8. X2 - Crystal oscillator output
9. VBAT - Battery backup voltage input
10. AD0 - Address selection bit 0
11. AD1 - Address selection bit 1
12. AD2 - Address selection bit 2
13. AD3 - Address selection bit 3
14. AD4 - Address selection bit 4
15. AD5 - Address selection bit 5
16. RESET - Reset input

Functional Features

• Timekeeping: The BQ4845YS-A4G4 accurately keeps track of time, including hours, minutes, and seconds.
• Alarm Function: It supports programmable alarms that can be set to trigger at specific times.
• Battery Backup: The integrated battery backup ensures that the clock continues to function even during power outages.
• I2C Interface: The product utilizes the I2C communication protocol for easy integration with other devices.

Advantages and Disadvantages

Advantages

• High accuracy timekeeping
• Low power consumption
• Compact size
• Wide operating temperature range

Disadvantages

• Limited address selection options
• No built-in temperature compensation

Working Principles

The BQ4845YS-A4G4 operates by utilizing an internal oscillator circuit and a crystal oscillator. The crystal oscillator provides a stable frequency reference, which is used to generate accurate timekeeping signals. The IC also incorporates a battery backup system to ensure uninterrupted operation during power interruptions.

Detailed Application Field Plans

The BQ4845YS-A4G4 finds applications in various electronic devices where accurate timekeeping is essential. Some common application fields include:

1. Consumer Electronics: Used in digital clocks, watches, and home appliances.
2. Automotive: Integrated into car dashboards for time display and event scheduling.
3. Industrial Automation: Employed in programmable logic controllers (PLCs) for precise timing operations.
4. Medical Devices: Utilized in medical equipment that requires accurate time synchronization.

Detailed and Complete Alternative Models

1. DS1307 - Real-time clock IC with I2C interface.
2. PCF8563 - Low-power real-time clock module with alarm function.
3. DS3231 - Highly accurate RTC module with temperature compensation.

These alternative models offer similar functionality and can be considered as substitutes for the BQ4845YS-A4G4 in various applications.

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