DS1305EN+T&R

DS1305EN+T&R

Product Overview

• Category: Integrated Circuit
• Use: Real-Time Clock (RTC)
• Characteristics:
  • Low power consumption
  • Small package size
  • High accuracy timekeeping
  • I2C interface for communication
• Package: T&R (Tape and Reel)
• Essence: The DS1305EN+T&R is a real-time clock IC used for accurate timekeeping in various electronic devices.
• Packaging/Quantity: The DS1305EN+T&R is packaged in tape and reel format, with a specified quantity per reel.

Specifications

• Supply Voltage: 2.0V to 5.5V
• Timekeeping Accuracy: ±2 minutes per month at 25°C
• Operating Temperature Range: -40°C to +85°C
• I2C Bus Frequency: Up to 400kHz
• Battery Backup Voltage: 2.0V to 5.5V
• Battery Backup Current: 1.2μA (typical)

Pin Configuration

The DS1305EN+T&R has the following pin configuration:

1. VCC: Power supply voltage input
2. GND: Ground connection
3. SDA: Serial Data Line for I2C communication
4. SCL: Serial Clock Line for I2C communication
5. SQW/OUT: Square Wave Output or Interrupt Output
6. RST: Reset Input
7. X1: Crystal Oscillator Input
8. X2: Crystal Oscillator Output
9. VBAT: Battery Backup Voltage Input

Functional Features

• Real-time clock with calendar functionality
• Battery backup for timekeeping during power loss
• Programmable square wave output
• Alarm and interrupt functions
• 32.768kHz crystal oscillator for accurate timekeeping

Advantages and Disadvantages

Advantages: - Low power consumption extends battery life - Small package size allows for space-saving designs - High accuracy timekeeping ensures precise timing requirements

Disadvantages: - Limited functionality compared to more advanced RTC ICs - Lack of additional features such as temperature compensation

Working Principles

The DS1305EN+T&R utilizes a 32.768kHz crystal oscillator to generate an accurate time base. It communicates with the host microcontroller or system through the I2C interface, allowing for easy integration into various electronic devices. The IC can be powered by a battery backup during power loss, ensuring continuous timekeeping.

Detailed Application Field Plans

The DS1305EN+T&R is commonly used in applications that require accurate timekeeping, such as:

1. Consumer Electronics: Digital clocks, watches, and timers.
2. Industrial Automation: Programmable logic controllers (PLCs) and data loggers.
3. Automotive: On-board computers and infotainment systems.
4. Medical Devices: Patient monitoring systems and medical equipment.
5. Communication Systems: Network switches and routers.

Detailed and Complete Alternative Models

1. DS3231: Higher accuracy real-time clock with temperature compensation.
2. PCF8563: Real-time clock with alarm and timer functions.
3. MCP7940N: Real-time clock with battery switchover and SRAM.

These alternative models offer additional features and improved performance compared to the DS1305EN+T&R.

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