DS1708RESA+ - English Editing Encyclopedia Entry

Product Overview

• Category: Integrated Circuit (IC)
• Use: Real-Time Clock (RTC) with Nonvolatile RAM (NVRAM)
• Characteristics: High accuracy, low power consumption, small package size
• Package: Surface Mount Technology (SMT), 8-pin SOIC (Small Outline Integrated Circuit)
• Essence: Combines a real-time clock and nonvolatile RAM in a single chip
• Packaging/Quantity: Available in tape and reel packaging, quantity per reel: 2500 units

Specifications

• Operating Voltage: 2.7V to 5.5V
• Clock Accuracy: ±2 minutes per month at 25°C
• Memory Capacity: 256 bytes of nonvolatile RAM
• Data Retention: Over 10 years
• Operating Temperature Range: -40°C to +85°C
• Interface: Serial Peripheral Interface (SPI)

Detailed Pin Configuration

1. VCC - Power supply voltage
2. GND - Ground reference
3. CLK - Clock input/output for SPI communication
4. CS - Chip select input for SPI communication
5. DI - Data input for SPI communication
6. DO - Data output for SPI communication
7. RST - Reset input
8. NC - No connection

Functional Features

• Real-time clock with calendar functionality
• Nonvolatile RAM for data storage
• Battery backup for continuous operation during power loss
• Automatic leap year compensation
• Alarm and timer functions
• Programmable square wave output

Advantages

• High accuracy timekeeping
• Low power consumption extends battery life
• Compact package size allows for space-constrained designs
• Easy integration with microcontrollers and other digital systems
• Reliable data retention during power interruptions

Disadvantages

• Limited nonvolatile RAM capacity (256 bytes)
• Requires an external battery for backup power
• Clock accuracy may be affected by temperature variations

Working Principles

The DS1708RESA+ combines a real-time clock and nonvolatile RAM in a single chip. It utilizes an internal oscillator to keep track of time, which can be accessed through the SPI interface. The nonvolatile RAM allows for data storage even when power is disconnected, ensuring data integrity. The chip also features a battery backup system to maintain continuous operation during power loss.

Detailed Application Field Plans

The DS1708RESA+ finds applications in various fields where accurate timekeeping and data storage are essential. Some potential application areas include: 1. Embedded systems 2. Industrial automation 3. Medical devices 4. Automotive electronics 5. Consumer electronics

Detailed and Complete Alternative Models

1. DS1307 - Real-Time Clock with I2C interface
2. DS3231 - Highly accurate RTC with temperature compensation
3. PCF8563 - Low-power RTC with alarm functions
4. MCP7940N - RTC with battery switchover and SRAM

Note: This list is not exhaustive and there are several other alternative models available in the market.

This encyclopedia entry provides an overview of the DS1708RESA+ integrated circuit. It includes information about its category, use, characteristics, package, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.