DS1486-120+ English Editing Encyclopedia Entry

Product Overview

Category: Electronic Component
Use: Timing and Real-Time Clock (RTC)
Characteristics: High precision, low power consumption
Package: DIP-8
Essence: Accurate timekeeping and calendar functions
Packaging/Quantity: 100 units per reel

Specifications

• Supply Voltage: 2.7V to 5.5V
• Timekeeping Current: 500nA (typical)
• Operating Temperature Range: -40°C to +85°C
• Accuracy: ±2ppm (at 25°C)
• Oscillator Frequency: 32.768kHz

Detailed 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. SQW/INT: Square Wave Output / Interrupt Output
6. NC: No Connection
7. NC: No Connection
8. VBAT: Backup battery input for maintaining timekeeping during power loss

Functional Features

• Real-time clock with calendar functionality
• Automatic leap year compensation
• Programmable alarm and interrupt functions
• Battery backup support for timekeeping during power loss
• Low power consumption for extended battery life
• I2C interface for easy integration with microcontrollers

Advantages

• High accuracy timekeeping with low ppm deviation
• Wide operating voltage range allows flexibility in power supply selection
• Compact DIP-8 package for easy PCB mounting
• Battery backup ensures uninterrupted timekeeping during power interruptions
• Versatile alarm and interrupt features enhance system functionality

Disadvantages

• Limited number of available pins for additional functionalities
• Requires an external backup battery for maintaining timekeeping during power loss

Working Principles

The DS1486-120+ is based on a quartz crystal oscillator that generates a precise 32.768kHz frequency. This frequency is divided internally to provide accurate timekeeping and calendar functions. The device utilizes an I2C interface for communication with external microcontrollers, enabling easy integration into various electronic systems. The backup battery input ensures continuous timekeeping even when the main power supply is disconnected.

Detailed Application Field Plans

1. Consumer Electronics: Used in digital watches, alarm clocks, and other time-sensitive devices.
2. Industrial Automation: Integrated into programmable logic controllers (PLCs) for accurate timing and scheduling operations.
3. Automotive Systems: Employed in vehicle dashboard clocks and event logging systems.
4. Medical Equipment: Utilized in medical devices requiring precise time synchronization.
5. Communication Systems: Incorporated in network equipment for timestamping and synchronization purposes.

Detailed Alternative Models

1. DS3231: Offers higher accuracy and temperature compensation.
2. PCF8563: Provides similar functionality with lower power consumption.
3. MCP7940N: Features additional non-volatile memory for data storage.

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