DS14285N

Product Overview

• Category: Integrated Circuit
• Use: Real-Time Clock (RTC)
• Characteristics:
  • Low power consumption
  • High accuracy
  • Small package size
• Package: DIP (Dual In-line Package)
• Essence: Provides accurate timekeeping functionality for various electronic devices
• Packaging/Quantity: Available in reels of 2500 units

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: 1.8V to 5.5V
• I2C Bus Interface: Supports standard and fast mode (100kHz and 400kHz)

Detailed Pin Configuration

The DS14285N has a total of 16 pins, which are as follows:

1. VCC - Power supply voltage input
2. GND - Ground reference
3. SDA - Serial Data Line for I2C communication
4. SCL - Serial Clock Line for I2C communication
5. IRQ - Interrupt Request output
6. SQW/OUT - Square Wave Output or General Purpose Output
7. VBAT - Battery backup voltage input
8. X1 - Crystal oscillator input
9. X2 - Crystal oscillator output
10. NC - No connection
11. NC - No connection
12. NC - No connection
13. NC - No connection
14. NC - No connection
15. NC - No connection
16. NC - No connection

Functional Features

• Real-time clock with calendar functionality
• Automatic leap year compensation
• Alarm and timer functions
• Programmable square wave output
• Battery backup support for timekeeping during power loss
• I2C interface for easy integration with microcontrollers

Advantages and Disadvantages

Advantages: - Low power consumption extends battery life - High accuracy ensures precise timekeeping - Small package size allows for space-efficient designs - I2C interface simplifies communication with other devices

Disadvantages: - Limited timekeeping accuracy at extreme temperatures - Lack of non-volatile memory for storing additional data

Working Principles

The DS14285N utilizes an internal oscillator circuit along with an external crystal to generate accurate timekeeping signals. It incorporates a real-time clock and calendar functionality, allowing it to keep track of time, date, and day of the week. The device can be powered by a main supply voltage or a backup battery, ensuring uninterrupted timekeeping even during power outages.

Detailed Application Field Plans

The DS14285N is commonly used in various electronic devices that require accurate timekeeping, such as:

1. Personal computers and laptops
2. Smartphones and tablets
3. Digital cameras and camcorders
4. Home appliances (microwaves, ovens, etc.)
5. Automotive systems (dashboard clocks, navigation systems, etc.)

Detailed and Complete Alternative Models

1. DS3231 - Real-Time Clock Module with Temperature Compensation
2. PCF8563 - Real-Time Clock and Calendar with I2C Interface
3. MCP7940N - Low-Power Real-Time Clock/Calendar with Battery Backup

These alternative models offer similar functionality and can be considered as alternatives to the DS14285N based on specific requirements and design considerations.

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