BQ4845P-A4

Product Overview

Category

BQ4845P-A4 belongs to the category of integrated circuits (ICs).

Use

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

Characteristics

• The BQ4845P-A4 offers accurate timekeeping and date tracking functionality.
• It operates with low power consumption, making it suitable for battery-powered devices.
• The module supports various clock formats, including 12-hour and 24-hour modes.
• It features a built-in alarm function for time-based notifications.
• BQ4845P-A4 incorporates non-volatile memory to retain data during power loss.

Package

The BQ4845P-A4 comes in a compact and durable package, designed to withstand harsh environmental conditions.

Essence

The essence of BQ4845P-A4 lies in its ability to provide reliable timekeeping and calendar functions in electronic devices.

Packaging/Quantity

This product is typically packaged in reels or tubes, with quantities varying based on customer requirements.

Specifications

• Supply Voltage: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Clock Format: 12-hour or 24-hour
• Alarm Function: Yes
• Memory Type: Non-volatile
• Interface: I2C

Detailed Pin Configuration

The BQ4845P-A4 has the following pin configuration:

1. VCC - Power supply voltage
2. GND - Ground
3. SDA - Serial Data Line (I2C)
4. SCL - Serial Clock Line (I2C)
5. IRQ - Interrupt Request Output
6. SQW/OUT - Square Wave Output
7. VBAT - Backup Battery Input

Functional Features

• Accurate timekeeping and date tracking
• Battery backup support for data retention during power loss
• Programmable alarm function for time-based notifications
• Configurable clock format (12-hour or 24-hour)
• Square wave output for timing applications

Advantages and Disadvantages

Advantages

• Low power consumption
• Compact size
• Reliable timekeeping accuracy
• Versatile clock format options
• Built-in alarm functionality

Disadvantages

• Limited memory capacity
• Requires an external backup battery for data retention during power loss

Working Principles

The BQ4845P-A4 utilizes a quartz crystal oscillator to generate precise clock signals. It communicates with the host device through the I2C interface, allowing for easy integration into various electronic systems. The module's non-volatile memory ensures that time and date information is retained even when the main power supply is disconnected.

Detailed Application Field Plans

The BQ4845P-A4 finds applications in a wide range of electronic devices, including but not limited to:

1. Consumer electronics: digital cameras, portable media players, gaming consoles.
2. Automotive systems: car audio systems, dashboard displays, navigation units.
3. Industrial equipment: programmable logic controllers (PLCs), measurement instruments, control panels.
4. Medical devices: patient monitoring systems, infusion pumps, diagnostic equipment.
5. Home automation: smart thermostats, security systems, lighting controls.

Detailed and Complete Alternative Models

1. DS1307 - Real-Time Clock (RTC) IC by Maxim Integrated.
2. PCF8563 - CMOS Real-Time Clock (RTC) and Calendar IC by NXP Semiconductors.
3. MCP7940N - I2C Real-Time Clock/Calendar IC by Microchip Technology.

These alternative models offer similar functionalities to the BQ4845P-A4 and can be considered as alternatives based on specific project requirements.

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