BQ3285S-SB2TR

Product Overview

Category

The BQ3285S-SB2TR belongs to the category of real-time clock (RTC) integrated circuits.

Use

This product is primarily used for timekeeping and calendar functions in electronic devices.

Characteristics

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

Package

The BQ3285S-SB2TR comes in a small surface-mount package, making it suitable for compact electronic devices.

Essence

The essence of this product lies in its ability to accurately keep track of time and date, providing reliable timekeeping functionality to electronic devices.

Packaging/Quantity

The BQ3285S-SB2TR 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
• Clock/calendar with leap year compensation
• Battery backup for continuous operation during power loss
• I2C interface for easy integration with microcontrollers

Detailed Pin Configuration

The BQ3285S-SB2TR has the following pin configuration:

1. VCC - Power supply input
2. GND - Ground connection
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 input
8. RST - Reset input

Functional Features

• Real-time clock with seconds, minutes, hours, day, date, month, and year information
• Automatic leap year compensation
• Alarm functionality with programmable interrupt output
• Battery backup for uninterrupted timekeeping during power loss
• I2C interface for easy integration with microcontrollers

Advantages and Disadvantages

Advantages

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

Disadvantages

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

Working Principles

The BQ3285S-SB2TR utilizes a combination of an internal clock circuit, battery backup, and I2C interface to provide accurate timekeeping functionality. The internal clock circuit is powered by the main supply voltage (VCC) while the battery backup (VBAT) ensures continuous operation during power loss.

The I2C interface allows communication between the BQ3285S-SB2TR and a microcontroller, enabling easy integration into electronic devices.

Detailed Application Field Plans

The BQ3285S-SB2TR is widely used in various electronic devices that require accurate timekeeping and calendar functions. Some common application fields include:

1. Consumer electronics: Smartphones, tablets, digital cameras, and portable media players.
2. Automotive: Car infotainment systems, dashboard clocks, and GPS navigation devices.
3. Industrial automation: Programmable logic controllers (PLCs), industrial timers, and data loggers.
4. Medical devices: Patient monitoring systems, medical equipment timers, and wearable health trackers.

Detailed and Complete Alternative Models

1. DS3231 - Real-time clock module with high accuracy and temperature compensation.
2. PCF8563 - Low-power real-time clock with alarm functionality and I2C interface.
3. MCP7940N - Real-time clock/calendar with battery backup and non-volatile memory.

These alternative models offer similar features and can be considered as substitutes for the BQ3285S-SB2TR in various applications.

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