DS1685E-3/T&R

Product Overview

Category

The DS1685E-3/T&R belongs to the category of integrated circuits (ICs).

Use

This product is primarily used for real-time clock (RTC) applications.

Characteristics

• The DS1685E-3/T&R is a highly accurate and reliable RTC IC.
• It offers low power consumption, making it suitable for battery-powered devices.
• The IC has a wide operating voltage range, ensuring compatibility with various systems.
• It features a built-in temperature-compensated crystal oscillator (TCXO) for precise timekeeping.
• The DS1685E-3/T&R supports both 12-hour and 24-hour time formats.
• It includes non-volatile memory to store time and date information during power loss.

Package

The DS1685E-3/T&R is available in a small surface-mount package (T&R), which stands for tape and reel. This packaging method ensures ease of handling and protection during transportation.

Essence

The essence of the DS1685E-3/T&R lies in its ability to accurately track and maintain time and date information in various electronic systems.

Packaging/Quantity

The DS1685E-3/T&R is typically packaged in reels containing a specific quantity of ICs. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Supply Voltage: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Timekeeping Accuracy: ±2 minutes per month
• Battery Backup Voltage: 2.0V to 5.5V
• Memory Capacity: 114 bytes
• Interface: I2C

Detailed Pin Configuration

The DS1685E-3/T&R has the following pin configuration:

1. VCC - Power supply voltage
2. GND - Ground
3. SDA - Serial data line (I2C)
4. SCL - Serial clock line (I2C)
5. X1 - Crystal oscillator input
6. X2 - Crystal oscillator output
7. VBAT - Battery backup voltage
8. RST - Reset pin

Functional Features

• Real-time clock with calendar functionality
• Automatic leap year compensation
• Alarm and timer functions
• Programmable square wave output
• Power-on reset circuit
• Battery low detection
• Non-volatile time and date storage

Advantages and Disadvantages

Advantages

• High accuracy timekeeping
• Low power consumption
• Wide operating voltage range
• Compact surface-mount package
• Built-in temperature-compensated crystal oscillator

Disadvantages

• Limited memory capacity (114 bytes)
• Reliance on an external crystal oscillator for timekeeping

Working Principles

The DS1685E-3/T&R utilizes a combination of an internal temperature-compensated crystal oscillator and an integrated circuit to accurately measure and maintain time and date information. The crystal oscillator provides a stable frequency reference, while the IC handles the necessary calculations and storage.

Detailed Application Field Plans

The DS1685E-3/T&R finds applications in various electronic devices that require accurate timekeeping, such as:

1. Consumer electronics (e.g., digital clocks, watches)
2. Industrial automation systems
3. Medical equipment
4. Automotive electronics
5. Communication devices

Detailed and Complete Alternative Models

1. DS3231 - Highly accurate RTC with additional features like temperature sensor and alarm functions.
2. PCF8563 - Low-power RTC IC with I2C interface and battery backup.
3. MCP7940N - Real-time clock/calendar IC with battery switchover and SRAM.

These alternative models offer similar functionality to the DS1685E-3/T&R and can be considered as alternatives based on specific requirements.

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