DS1345WP-100IND

Product Overview

Category: Integrated Circuit (IC)

Use: Real-Time Clock (RTC) with Non-Volatile Memory (NVRAM)

Characteristics: - Low-power CMOS technology - 10-year minimum data retention in the absence of power - Automatic power-fail detect and switch circuitry - Battery backup for continuous timekeeping - Industrial temperature range (-40°C to +85°C) - Small package size

Package: 20-pin SOIC (Small Outline Integrated Circuit)

Essence: The DS1345WP-100IND is a real-time clock IC that combines a clock/calendar, alarm functions, and non-volatile memory. It provides accurate timekeeping even during power outages.

Packaging/Quantity: The DS1345WP-100IND is available in tape and reel packaging. The quantity per reel is 250 units.

Specifications

• Supply Voltage: 2.7V to 5.5V
• Timekeeping Current: 1.0µA (typical)
• Battery Backup Current: 600nA (typical)
• Memory Size: 4Kb (512 x 8 bits)
• Clock Accuracy: ±2 minutes per month at 25°C
• Alarm Output: Open-drain, active-low
• I/O Compatibility: 3.3V or 5V systems

Detailed Pin Configuration

The DS1345WP-100IND has a total of 20 pins. Here is the detailed pin configuration:

1. VCC - Power supply input
2. GND - Ground
3. X1 - Crystal oscillator input
4. X2 - Crystal oscillator output
5. VBAT - Battery backup input
6. NC - No connection
7. SDA - Serial data input/output
8. SCL - Serial clock input
9. A2 - Address input 2
10. A1 - Address input 1
11. A0 - Address input 0
12. VCC - Power supply input
13. GND - Ground
14. SQW/INT - Square wave output or interrupt output
15. RST - Reset input
16. VCC - Power supply input
17. GND - Ground
18. NC - No connection
19. NC - No connection
20. NC - No connection

Functional Features

• Real-time clock with calendar functions
• Alarm with programmable frequency and time
• Non-volatile memory for data storage
• Battery backup for continuous operation
• Automatic power-fail detection and switch circuitry
• Low-power consumption for extended battery life
• Square wave output for timing applications
• Reset input for system initialization

Advantages and Disadvantages

Advantages: - Accurate timekeeping during power outages - Low power consumption - Small package size - Industrial temperature range - Battery backup for continuous operation

Disadvantages: - Limited memory size (4Kb) - Clock accuracy may vary with temperature

Working Principles

The DS1345WP-100IND utilizes a low-power CMOS technology to provide accurate timekeeping and non-volatile memory storage. It operates using a crystal oscillator for precise timing and has a battery backup to ensure continuous operation during power failures. The automatic power-fail detect and switch circuitry seamlessly switches between the main power supply and the backup battery.

Detailed Application Field Plans

The DS1345WP-100IND is commonly used in various applications, including:

1. Embedded systems
2. Industrial automation
3. Medical devices
4. Automotive electronics
5. Consumer electronics
6. Security systems
7. Data loggers
8. Smart meters

Detailed and Complete Alternative Models

1. DS1345WP-70IND: Similar to DS1345WP-100IND but with a 70ns access time.
2. DS1345YP-100IND: Real-time clock IC with NVRAM and additional features like tamper detection.
3. DS3231: Highly accurate RTC module with integrated temperature compensation.

These alternative models offer similar functionalities and can be considered as alternatives to the DS1345WP-100IND depending on specific requirements.

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