DS1321S/T&R

Product Overview

• Belongs to: Integrated Circuits (ICs)
• Category: Real-Time Clock (RTC) IC
• Use: DS1321S/T&R is used for real-time clock and calendar functions in a wide range of applications.
• Characteristics: Low power consumption, high accuracy, small package size
• Package: T&R (Tape & Reel)
• Essence: Provides accurate timekeeping and calendar functions
• Packaging/Quantity: Available in tape and reel packaging, quantity varies by supplier

Specifications

• Operating Voltage: 2.3V to 5.5V
• Timekeeping Accuracy: ±2 minutes per year at 25°C
• Operating Temperature Range: -40°C to +85°C
• I2C Interface: Up to 400kHz
• Battery Backup Input for Continuous Timekeeping

Detailed Pin Configuration

• Pin 1: VCC
• Pin 2: SDA (I2C Data)
• Pin 3: SCL (I2C Clock)
• Pin 4: GND
• Pin 5: X1 (32.768kHz Crystal Connection)
• Pin 6: X2 (32.768kHz Crystal Connection)
• Pin 7: NC (No Connection)
• Pin 8: VBAT (Battery Backup Input)

Functional Features

• Real-Time Clock: Provides accurate timekeeping
• Calendar Functions: Supports date and month tracking
• Alarm Functionality: Allows setting of alarms
• Battery Backup: Ensures continuous timekeeping during power loss

Advantages and Disadvantages

Advantages

• Low power consumption
• High timekeeping accuracy
• Small package size

Disadvantages

• Limited temperature range compared to some alternatives
• Requires an external crystal for timekeeping

Working Principles

The DS1321S/T&R operates by utilizing an internal oscillator and an external crystal to maintain accurate timekeeping. It communicates with the host microcontroller through the I2C interface, allowing for easy integration into various systems.

Detailed Application Field Plans

• Consumer Electronics: Used in digital clocks, appliances, and wearables
• Industrial Automation: Integrated into data loggers, industrial timers, and control systems
• Automotive: Employed in car infotainment systems and dashboard displays
• Medical Devices: Utilized for time-sensitive operations in medical equipment

Detailed and Complete Alternative Models

• DS3231: Offers higher temperature range and integrated crystal
• MCP7940N: Provides battery switchover and trickle charge capability
• PCF85263A: Features automatic backup switchover and tamper detection

Note: The above information is subject to change based on the manufacturer's specifications and product revisions.

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