DS1831E

Product Overview

• Category: Integrated Circuit
• Use: Real-Time Clock (RTC)
• Characteristics:
  • Low power consumption
  • High accuracy
  • Small package size
• Package: SOIC-8
• Essence: The DS1831E is a real-time clock IC that provides accurate timekeeping and calendar functions.
• Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Supply Voltage: 2.7V to 5.5V
• Timekeeping Accuracy: ±2 minutes per month at 25°C
• Operating Temperature Range: -40°C to +85°C
• Battery Backup Voltage: 2.0V to 5.5V
• Battery Backup Current: 600nA (typical)

Pin Configuration

The DS1831E has the following pin configuration:

```

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| | | 1 8 | | | | 2 7 | | | | 3 6 | | | | 4 5 | |____________| ```

Pin Description: 1. VCC: Power supply input 2. GND: Ground 3. SDA: Serial data input/output 4. SCL: Serial clock input 5. SQW/INT: Square wave output/interrupt output 6. RST: Reset input 7. VBAT: Battery backup input 8. NC: No connection

Functional Features

• Real-time clock with calendar functions
• Automatic leap year compensation
• Alarm function with programmable interrupt
• Battery backup for timekeeping during power loss
• I2C interface for communication with microcontrollers

Advantages and Disadvantages

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

Disadvantages: - Limited functionality compared to more advanced RTCs - Requires an external battery for backup power

Working Principles

The DS1831E utilizes a quartz crystal oscillator to generate accurate timekeeping signals. It incorporates a counter and registers to keep track of the current time and date. The IC can be powered by a main power supply or a backup battery, ensuring uninterrupted timekeeping even during power outages.

Detailed Application Field Plans

The DS1831E is commonly used in various applications that require accurate timekeeping, such as:

1. Consumer electronics: Clocks, watches, and timers
2. Industrial automation: Programmable logic controllers (PLCs) and data loggers
3. Automotive: On-board clocks and event scheduling systems
4. Medical devices: Patient monitoring systems and drug dispensers
5. Security systems: Access control panels and surveillance equipment

Detailed and Complete Alternative Models

1. DS3231: Offers higher timekeeping accuracy and additional features like temperature compensation.
2. PCF8563: Provides similar timekeeping functions with low power consumption.
3. MCP7940N: Features battery-backed real-time clock/calendar with I2C interface.

These alternative models offer different specifications and features, allowing users to choose the most suitable option for their specific requirements.

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