DS1687-5IND

Product Overview

Category: Integrated Circuit (IC)

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

Characteristics: - Combines a real-time clock and non-volatile RAM in a single package - Provides accurate timekeeping and data storage capabilities - Suitable for applications requiring time stamping, event logging, and data backup

Package: DIP (Dual In-line Package)

Essence: The DS1687-5IND is a versatile IC that integrates a real-time clock and non-volatile RAM, offering reliable timekeeping and data storage functionalities.

Packaging/Quantity: The DS1687-5IND is typically packaged in a DIP package and is available in various quantities.

Specifications

The DS1687-5IND features the following specifications:

• Real-Time Clock:

  • Accuracy: ±2 minutes per month at 25°C
  • Time Format: Hours, minutes, seconds, day, date, month, year
  • Leap Year Compensation: Automatic
  • Clock Alarm: Programmable
  • Oscillator: Crystal-controlled

• Non-Volatile RAM:

  • Capacity: 128 bytes
  • Data Retention: Over 10 years
  • Write Endurance: 1 million cycles

Detailed Pin Configuration

The DS1687-5IND has the following pin configuration:

1. VCC - Power supply voltage
2. GND - Ground
3. X1 - Crystal oscillator input
4. X2 - Crystal oscillator output
5. RST - Reset input
6. A0-A6 - Address inputs
7. CE - Chip enable
8. WE - Write enable
9. OE - Output enable
10. D0-D7 - Data bus

Functional Features

The DS1687-5IND offers the following functional features:

• Real-Time Clock:

  • Accurate timekeeping with automatic leap year compensation
  • Programmable clock alarm for event triggering
  • Crystal-controlled oscillator for precise timing

• Non-Volatile RAM:

  • Data storage with over 10 years of retention
  • 128 bytes of non-volatile memory
  • High write endurance of 1 million cycles

Advantages and Disadvantages

Advantages: - Integration of real-time clock and non-volatile RAM in a single package saves board space - Accurate timekeeping and reliable data storage capabilities - Versatile functionality suitable for various applications

Disadvantages: - Limited non-volatile RAM capacity (128 bytes) - Relatively higher power consumption compared to some modern alternatives

Working Principles

The DS1687-5IND combines a real-time clock and non-volatile RAM by integrating both functionalities into a single IC. The real-time clock component utilizes a crystal-controlled oscillator to accurately keep track of time, including hours, minutes, seconds, day, date, month, and year. The non-volatile RAM provides data storage capabilities, allowing users to store and retrieve information even when power is disconnected.

Detailed Application Field Plans

The DS1687-5IND can be applied in various fields, including but not limited to:

1. Embedded Systems: Used for time stamping events, logging data, and maintaining system state during power interruptions.
2. Industrial Automation: Enables accurate time synchronization and event logging in industrial control systems.
3. Medical Devices: Provides reliable timekeeping and data backup functionalities in medical equipment.
4. Automotive Electronics: Used for recording and storing vehicle diagnostic information, event logs, and maintenance records.

Detailed and Complete Alternative Models

1. DS3231 - A highly accurate real-time clock module with integrated temperature compensation and I2C interface.
2. MCP7940N - Real-Time Clock/Calendar with battery backup, I2C interface, and additional features like alarms and timers.
3. PCF8563 - Low-power real-time clock/calendar IC with I2C interface and integrated alarm function.

These alternative models offer similar functionalities to the DS1687-5IND and can be considered based on specific application requirements.

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