BQ4845S-A4NTR

Product Overview

Category

The BQ4845S-A4NTR belongs to the category of integrated circuits (ICs).

Use

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

Characteristics

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

Package

The BQ4845S-A4NTR is available in a small surface mount package, typically measuring 8mm x 8mm.

Essence

The essence of this product lies in its ability to accurately keep track of time and provide real-time clock functionality to electronic devices.

Packaging/Quantity

The BQ4845S-A4NTR is usually packaged in reels or tubes, with quantities varying depending on customer requirements.

Specifications

• Supply Voltage: 2.7V to 5.5V
• Timekeeping Accuracy: ±2 minutes per month
• Operating Temperature Range: -40°C to +85°C
• Interface: I2C (Inter-Integrated Circuit)
• Clock Frequency: 32.768 kHz

Detailed Pin Configuration

The BQ4845S-A4NTR has the following pin configuration:

1. VCC - Power supply input
2. GND - Ground
3. SDA - Serial Data Line (I2C)
4. SCL - Serial Clock Line (I2C)
5. SQW/INT - Square Wave Output / Interrupt Output
6. X1 - Crystal oscillator input
7. X2 - Crystal oscillator output
8. NC - No Connection

Functional Features

• Real-time clock functionality
• Alarm function
• Battery backup for timekeeping during power loss
• Programmable square wave output
• Interrupt output for time-related events

Advantages and Disadvantages

Advantages

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

Disadvantages

• Limited memory for additional data storage
• Requires an external crystal oscillator for clock operation

Working Principles

The BQ4845S-A4NTR utilizes a quartz crystal oscillator to generate a precise 32.768 kHz clock signal. This clock signal is used to keep track of time and provide accurate timekeeping functionality. The IC also incorporates a battery backup system to ensure uninterrupted timekeeping during power loss.

Detailed Application Field Plans

The BQ4845S-A4NTR finds applications in various electronic devices that require real-time clock functionality, such as:

1. Consumer electronics (e.g., digital watches, clocks)
2. Automotive systems (e.g., car audio systems, dashboard displays)
3. Industrial automation (e.g., programmable logic controllers, data loggers)
4. Medical equipment (e.g., patient monitoring devices, infusion pumps)
5. Communication devices (e.g., routers, switches)

Detailed and Complete Alternative Models

1. DS1307 - Real-Time Clock IC by Maxim Integrated
2. PCF8563 - Real-Time Clock IC by NXP Semiconductors
3. MCP7940N - Real-Time Clock IC by Microchip Technology
4. RV-8803-C7 - Real-Time Clock IC by Epson

These alternative models offer similar functionality and can be considered as alternatives to the BQ4845S-A4NTR.

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