DS17485S-5+T&R

Product Overview

Category: Integrated Circuits (ICs)

Use: The DS17485S-5+T&R is a digital real-time clock (RTC) designed for various applications that require accurate timekeeping. It provides a reliable and convenient solution for time-related functions in electronic devices.

Characteristics: - High accuracy timekeeping - Low power consumption - Small form factor - Easy integration into existing systems - Wide operating temperature range

Package: The DS17485S-5+T&R comes in a surface mount package, which allows for easy installation on printed circuit boards (PCBs). The package type is Tape & Reel (T&R), which ensures safe transportation and storage.

Essence: The essence of the DS17485S-5+T&R lies in its ability to accurately keep track of time and provide time-related functions in electronic devices.

Packaging/Quantity: The DS17485S-5+T&R is typically packaged in reels, with each reel containing a specific quantity of ICs. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Supply Voltage: 2.97V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Timekeeping Accuracy: ±2 minutes per month at 25°C
• Clock Frequency: 32.768kHz
• Battery Backup Voltage: 2.0V to 5.5V
• Serial Interface: I²C

Detailed Pin Configuration

The DS17485S-5+T&R 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/OUT: Square wave output or interrupt output
6. VBAT: Battery backup input
7. X1: Crystal oscillator input
8. X2: Crystal oscillator output

Functional Features

• Real-time clock with calendar functionality
• Alarm and timer functions
• Power-fail detection and battery backup support
• Programmable square wave output
• 12-hour or 24-hour time format
• Leap year compensation

Advantages and Disadvantages

Advantages: - High accuracy timekeeping - Low power consumption - Small form factor for easy integration - Versatile functionality for various applications - Reliable performance in wide temperature range

Disadvantages: - Limited memory capacity for additional data storage - Requires an external crystal oscillator for operation

Working Principles

The DS17485S-5+T&R utilizes a combination of an internal oscillator, counters, and registers to accurately keep track of time. It relies on an external crystal oscillator for precise time measurement. The IC operates by continuously updating the time and date information based on the crystal oscillator's frequency.

Detailed Application Field Plans

The DS17485S-5+T&R finds applications in various fields, including but not limited to: - Consumer electronics (e.g., digital clocks, appliances) - Industrial automation (e.g., programmable logic controllers) - Automotive systems (e.g., dashboard displays) - Medical devices (e.g., patient monitoring equipment) - Communication systems (e.g., network switches)

Detailed and Complete Alternative Models

1. DS3231 - A highly accurate RTC with integrated temperature compensation.
2. PCF8563 - An RTC with alarm and timer functions, suitable for low-power applications.
3. MCP7940N - An RTC with battery backup and power-fail detection features.
4. DS1307 - A popular RTC with I²C interface and battery backup support.

These alternative models offer similar functionalities to the DS17485S-5+T&R and can be considered as alternatives based on specific requirements and preferences.

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