DS1642-85+ English Editing Encyclopedia Entry

Product Overview

Category

The DS1642-85+ belongs to the category of integrated circuits (ICs).

Use

This product is primarily used for real-time clock (RTC) applications.

Characteristics

• The DS1642-85+ is a highly accurate and reliable RTC IC.
• It offers non-volatile timekeeping, ensuring data retention even during power loss.
• This IC operates in a wide temperature range, making it suitable for various environments.
• It features low power consumption, prolonging battery life in portable devices.

Package

The DS1642-85+ is available in a compact 8-pin SOIC package.

Essence

The essence of the DS1642-85+ lies in its ability to provide precise timekeeping functionality in a small form factor.

Packaging/Quantity

This product is typically packaged in reels or tubes, with quantities varying based on customer requirements.

Specifications

• Supply Voltage: 2.7V to 5.5V
• Timekeeping Accuracy: ±2 minutes per month
• Operating Temperature Range: -40°C to +85°C
• Battery Backup Voltage: 2.0V to 3.6V
• Interface: Serial I/O

Detailed Pin Configuration

1. VCC: Power supply input
2. GND: Ground connection
3. SDA: Serial Data Line
4. SCL: Serial Clock Line
5. SQW/OUT: Square Wave Output
6. RST: Reset Input
7. VBAT: Battery Backup Input
8. NC: No Connection

Functional Features

• Real-time clock with calendar functionality
• Alarm and timer capabilities
• Battery backup for continuous timekeeping during power loss
• Programmable square wave output
• User-accessible registers for configuration and control

Advantages and Disadvantages

Advantages

• High accuracy timekeeping
• Wide operating temperature range
• Low power consumption
• Compact package size
• Battery backup ensures data retention during power loss

Disadvantages

• Limited memory capacity for additional data storage
• Lack of advanced features compared to more specialized RTC ICs

Working Principles

The DS1642-85+ utilizes an internal oscillator and a counter to keep track of time. It relies on an external battery for backup power, ensuring uninterrupted timekeeping even when the main power source is disconnected. The IC communicates with a microcontroller or host system through a serial interface, allowing for easy integration into various applications.

Detailed Application Field Plans

The DS1642-85+ finds application in a wide range of industries, including:

1. Consumer Electronics: Used in digital cameras, portable media players, and smartwatches for accurate timekeeping.
2. Automotive: Integrated into car infotainment systems and dashboard displays to provide real-time clock functionality.
3. Industrial Automation: Employed in programmable logic controllers (PLCs) and industrial control systems for precise time synchronization.
4. Medical Devices: Utilized in medical equipment such as patient monitors and infusion pumps to maintain accurate timestamps.

Detailed and Complete Alternative Models

1. DS3231: Offers higher timekeeping accuracy and additional features like temperature compensation.
2. PCF8563: Provides similar functionality with low power consumption and a compact package.
3. MCP7940N: Features a larger memory capacity and supports multiple alarms.

In conclusion, the DS1642-85+ is a reliable and accurate real-time clock IC that finds application in various industries. Its compact size, low power consumption, and battery backup make it suitable for portable and battery-powered devices. While it may lack advanced features compared to specialized RTC ICs, it offers a cost-effective solution for basic timekeeping requirements.