DS14287+ - English Editing Encyclopedia Entry

Product Overview

Category: Integrated Circuits
Use: Real-time clock (RTC) with battery backup
Characteristics: High precision, low power consumption
Package: DIP-8 (Dual In-line Package)
Essence: Accurate timekeeping and calendar functions
Packaging/Quantity: Available in reels of 1000 units

Specifications

• Supply Voltage: 2.7V to 5.5V
• Timekeeping Current: 500nA (typical)
• Operating Temperature Range: -40°C to +85°C
• Clock Accuracy: ±2 minutes per month at 25°C
• Battery Backup Voltage: 2.0V to 5.5V

Detailed Pin Configuration

The DS14287+ features the following pin configuration:

1. VCC - Power supply input
2. GND - Ground connection
3. X1 - Crystal oscillator input
4. X2 - Crystal oscillator output
5. RESET - Reset input
6. IRQ - Interrupt request output
7. SQW/OUT - Square wave output
8. VBAT - Battery backup input

Functional Features

• Real-time clock with calendar functions
• Automatic leap year compensation
• Programmable square wave output frequency
• Battery backup for continuous operation during power loss
• Alarm functionality with interrupt request output

Advantages and Disadvantages

Advantages: - High precision timekeeping - Low power consumption - Wide operating voltage range - Compact DIP-8 package for easy integration

Disadvantages: - Limited storage capacity for user data - Lack of non-volatile memory for extended power-off periods

Working Principles

The DS14287+ is a real-time clock integrated circuit that utilizes an external crystal oscillator for accurate timekeeping. It operates on a low supply voltage and consumes minimal power, making it suitable for battery-powered applications. The device features an internal counter that keeps track of time and date, with automatic leap year compensation. In the event of a power loss, the DS14287+ seamlessly switches to battery backup mode, ensuring uninterrupted operation.

Detailed Application Field Plans

The DS14287+ finds applications in various fields, including:

1. Embedded Systems: Used as a reliable timekeeping component in microcontroller-based systems.
2. Industrial Automation: Provides accurate time synchronization for industrial control systems.
3. Consumer Electronics: Integrated into devices such as digital cameras, printers, and home appliances to maintain accurate timestamps.
4. Automotive: Enables precise timekeeping for automotive systems, including infotainment and navigation units.
5. Medical Devices: Used in medical equipment for accurate time stamping of events and data logging.

Detailed and Complete Alternative Models

1. DS1307 - Real-time clock module with I2C interface
2. PCF8563 - Low-power real-time clock with alarm functionality
3. MCP7940N - I2C real-time clock/calendar with SRAM and EEPROM

These alternative models offer similar functionalities to the DS14287+ and can be considered based on specific application requirements.

In conclusion, the DS14287+ is a highly accurate real-time clock integrated circuit designed for various applications. Its low power consumption, wide operating voltage range, and compact package make it a popular choice among designers. With its reliable timekeeping capabilities and battery backup functionality, the DS14287+ ensures uninterrupted operation even during power outages.