DS1864T+

DS1864T+ - English Editing Encyclopedia Entry

Product Overview

Category

The DS1864T+ belongs to the category of integrated circuits (ICs).

Use

It is primarily used as a real-time clock (RTC) and calendar device.

Characteristics

• The DS1864T+ is a highly accurate and reliable RTC with built-in crystal oscillator.
• It offers non-volatile timekeeping, which ensures accurate timekeeping even during power loss.
• The device operates in a wide temperature range, making it suitable for various applications.
• It features low power consumption, extending battery life in portable devices.

Package

The DS1864T+ is available in a small surface-mount package.

Essence

The essence of DS1864T+ lies in its ability to provide precise timekeeping and calendar functions in a compact form factor.

Packaging/Quantity

The DS1864T+ is typically packaged in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Supply Voltage: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Timekeeping Accuracy: ±2 minutes per month at 25°C
• Battery Backup Voltage: 2.0V to 3.7V
• Interface: I2C

Detailed Pin Configuration

The DS1864T+ has a total of 8 pins, each serving a specific function:

1. VCC - Power supply input
2. GND - Ground connection
3. SDA - Serial data line for I2C communication
4. SCL - Serial clock line for I2C communication
5. SQW/INT - Square wave output or interrupt output
6. RST - Reset input
7. BAT - Battery backup input
8. X1/X2 - Crystal oscillator connections

Functional Features

1. Real-Time Clock: The DS1864T+ provides accurate timekeeping with seconds, minutes, hours, day, date, month, and year information.
2. Alarm Function: It supports programmable alarms for specific time events.
3. Battery Backup: The device includes a battery backup feature to ensure uninterrupted timekeeping during power outages.
4. Oscillator Calibration: The DS1864T+ allows calibration of the crystal oscillator for improved accuracy.
5. I2C Interface: It utilizes the I2C communication protocol for easy integration with microcontrollers and other devices.

Advantages and Disadvantages

Advantages

• High accuracy timekeeping
• Low power consumption
• Wide operating temperature range
• Compact form factor

Disadvantages

• Limited quantity per package (250 units)
• Requires external crystal oscillator

Working Principles

The DS1864T+ operates by utilizing an internal crystal oscillator to generate clock signals. It keeps track of time using a counter that increments based on these clock signals. The device also incorporates non-volatile memory to store time and date information, ensuring data retention during power loss.

Detailed Application Field Plans

The DS1864T+ finds applications in various fields, including but not limited to: - Consumer electronics - Industrial automation - Medical devices - Automotive systems - Security systems

Detailed and Complete Alternative Models

1. DS3231 - A highly accurate RTC with temperature compensation and additional alarm features.
2. PCF8563 - An RTC with integrated temperature sensor and alarm functionality.
3. MCP7940N - A low-power RTC with battery backup and I2C interface.

These alternative models offer similar functionalities to the DS1864T+, providing options for different design requirements.

In conclusion, the DS1864T+ is a reliable real-time clock and calendar device with high accuracy and low power consumption. Its compact form factor and wide operating temperature range make it suitable for various applications in different industries.