BQ3285LFSS-A1G4

Product Overview

Category

BQ3285LFSS-A1G4 belongs to the category of Real-Time Clocks (RTCs).

Use

This product is primarily used for timekeeping and synchronization purposes in various electronic devices.

Characteristics

• High accuracy timekeeping
• Low power consumption
• Integrated crystal oscillator
• Non-volatile memory for data storage
• I2C interface for communication

Package

BQ3285LFSS-A1G4 is available in a small surface-mount package, making it suitable for compact electronic devices.

Essence

The essence of this product lies in its ability to provide accurate real-time clock functionality while consuming minimal power.

Packaging/Quantity

The BQ3285LFSS-A1G4 is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Supply Voltage: 1.8V - 5.5V
• Timekeeping Accuracy: ±2 minutes per year
• Operating Temperature Range: -40°C to +85°C
• Data Retention: Over 10 years
• I2C Bus Frequency: Up to 400kHz

Detailed Pin Configuration

The BQ3285LFSS-A1G4 has the following pin configuration:

1. VCC - Power supply input
2. GND - Ground
3. SDA - I2C data line
4. SCL - I2C clock line
5. X1 - Crystal oscillator input
6. X2 - Crystal oscillator output
7. VBAT - Backup battery input
8. RST - Reset input

Functional Features

• Real-time clock with calendar functionality
• Alarm and timer functions
• Automatic leap year compensation
• Battery backup for timekeeping during power loss
• Programmable square wave output

Advantages and Disadvantages

Advantages

• High accuracy timekeeping
• Low power consumption
• Integrated crystal oscillator simplifies design
• Non-volatile memory ensures data retention
• I2C interface allows for easy integration

Disadvantages

• Limited temperature range (-40°C to +85°C)
• Requires an external backup battery for continuous operation during power loss

Working Principles

The BQ3285LFSS-A1G4 utilizes a crystal oscillator to generate precise clock signals. It maintains accurate timekeeping by counting the oscillations of the crystal and compensating for any drift. The integrated non-volatile memory stores the time and date information, ensuring data retention even when power is lost.

Detailed Application Field Plans

The BQ3285LFSS-A1G4 can be used in various applications, including:

1. Consumer electronics: Smartphones, tablets, digital cameras
2. Automotive: Car infotainment systems, dashboard displays
3. Industrial equipment: Data loggers, measurement devices
4. Medical devices: Patient monitoring systems, diagnostic equipment
5. Home automation: Smart thermostats, security systems

Detailed and Complete Alternative Models

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

These alternative models offer similar functionality and can be considered as alternatives to the BQ3285LFSS-A1G4.

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