DS1481S/T&R

Product Overview

• Category: Integrated Circuit
• Use: Real-time Clock (RTC) with I2C Interface
• Characteristics: Low power consumption, accurate timekeeping, small package size
• Package: Surface Mount, Tape & Reel
• Essence: Provides accurate timekeeping for various electronic devices
• Packaging/Quantity: Available in tape and reel packaging, quantity varies by supplier

Specifications

• Operating Voltage: 1.8V to 5.5V
• Clock Accuracy: ±2 minutes per month at 25°C
• I2C Bus Frequency: 100kHz or 400kHz
• Operating Temperature Range: -40°C to +85°C
• Package Type: 8-pin SOIC

Detailed Pin Configuration

1. VCC
2. SDA
3. SCL
4. GND
5. NC
6. NC
7. NC
8. NC

Functional Features

• Real-time clock/calendar
• 56-byte nonvolatile RAM
• Automatic power-fail detect and switch circuitry
• I2C serial interface

Advantages and Disadvantages

Advantages

• Low power consumption
• Small package size
• Accurate timekeeping

Disadvantages

• Limited nonvolatile RAM capacity
• Requires external crystal for timekeeping accuracy

Working Principles

The DS1481S/T&R operates as a real-time clock by keeping track of time and date information using an internal oscillator and a connected external crystal. It communicates with the host microcontroller through the I2C interface, providing accurate timekeeping and nonvolatile RAM storage.

Detailed Application Field Plans

The DS1481S/T&R is commonly used in applications requiring precise timekeeping, such as: - Embedded systems - Data loggers - Medical devices - Industrial automation

Detailed and Complete Alternative Models

• DS3231: Offers higher accuracy and temperature-compensated crystal oscillator
• MCP7940N: Provides battery backup for timekeeping and alarm functions
• PCF8563: Low-power real-time clock/calendar with I2C-bus

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