BQ3285S-SB2TRG4

Product Overview

Category

The BQ3285S-SB2TRG4 belongs to the category of real-time clock (RTC) and calendar devices.

Use

This device is primarily used for timekeeping and calendar functions in various electronic systems.

Characteristics

• The BQ3285S-SB2TRG4 offers accurate timekeeping with low power consumption.
• It has a built-in temperature-compensated crystal oscillator (TCXO) for enhanced precision.
• The device supports battery backup, ensuring uninterrupted operation during power outages.
• It features a wide operating voltage range, making it suitable for diverse applications.
• The BQ3285S-SB2TRG4 incorporates non-volatile memory for data storage.

Package

The BQ3285S-SB2TRG4 is available in a small surface-mount package, which facilitates easy integration into electronic systems.

Essence

The essence of the BQ3285S-SB2TRG4 lies in its ability to provide reliable timekeeping and calendar functionality while consuming minimal power.

Packaging/Quantity

This device is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Supply Voltage: 1.8V to 5.5V
• Timekeeping Accuracy: ±2 minutes per month
• Operating Temperature Range: -40°C to +85°C
• Battery Backup Voltage: 2.0V to 5.5V
• I2C Interface Compatibility: Standard-mode (100 kHz) and Fast-mode (400 kHz)

Detailed Pin Configuration

The BQ3285S-SB2TRG4 has the following pin configuration:

1. VCC: Power supply input
2. GND: Ground reference
3. SDA: Serial data line for I2C communication
4. SCL: Serial clock line for I2C communication
5. X1: Crystal oscillator input
6. X2: Crystal oscillator output
7. VBAT: Battery backup supply input

Functional Features

• Real-time clock with calendar functions
• Automatic leap year compensation
• Alarm functionality with programmable interrupt output
• Power-on reset and watchdog timer
• 32.768 kHz square wave output for system timing

Advantages and Disadvantages

Advantages

• Accurate timekeeping with low power consumption
• Wide operating voltage range allows for versatile applications
• Battery backup ensures uninterrupted operation during power outages
• Compact surface-mount package facilitates easy integration

Disadvantages

• Timekeeping accuracy may be affected by external factors such as temperature variations
• Limited storage capacity for additional data

Working Principles

The BQ3285S-SB2TRG4 utilizes a temperature-compensated crystal oscillator (TCXO) to generate a stable clock signal. This clock signal is used to maintain accurate timekeeping and calendar functions. The device also incorporates non-volatile memory to store critical information, ensuring data integrity during power loss.

Detailed Application Field Plans

The BQ3285S-SB2TRG4 finds application in various electronic systems that require precise timekeeping and calendar functionality. Some potential application fields include:

1. Consumer Electronics: Smartphones, tablets, digital cameras, and portable media players.
2. Industrial Automation: Programmable logic controllers (PLCs), data loggers, and industrial timers.
3. Automotive: Vehicle dashboard displays, infotainment systems, and navigation devices.
4. Medical Devices: Patient monitoring systems, medical equipment, and diagnostic instruments.
5. Internet of Things (IoT): Smart home automation, wearable devices, and sensor networks.

Detailed and Complete Alternative Models

1. DS3231: Real-time clock module with high timekeeping accuracy and I2C interface.
2. PCF8563: Low-power real-time clock/calendar IC with alarm functionality.
3. MCP7940N: Battery-backed real-time clock/calendar with SRAM and I2C interface.

These alternative models offer similar features and can be considered as substitutes for the BQ3285S-SB2TRG4 in various applications.

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