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DS1216H
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DS1216H

Product Overview

  • Category: Integrated Circuit
  • Use: Nonvolatile Timekeeping RAM
  • Characteristics:
    • Combines a static RAM, real-time clock (RTC), and battery backup circuitry in a single package.
    • Provides nonvolatile timekeeping, alarm functions, and power-fail control logic.
    • Can be used as a direct replacement for industry-standard 16K x 8 SRAMs.
  • Package: 24-pin DIP (Dual Inline Package)
  • Essence: Integration of RAM, RTC, and battery backup circuitry
  • Packaging/Quantity: Available in tubes or reels, quantity per package varies

Specifications

  • Memory Size: 16K x 8 bits
  • Supply Voltage: 4.5V to 5.5V
  • Operating Temperature Range: -40°C to +85°C
  • Data Retention: Minimum 10 years
  • Clock Accuracy: ±2 minutes per month at 25°C
  • Battery Backup Voltage: 2.0V to 3.6V

Detailed Pin Configuration

  1. VCC - Power Supply
  2. GND - Ground
  3. CE - Chip Enable
  4. OE - Output Enable
  5. WE - Write Enable
  6. A0-A13 - Address Inputs
  7. DQ0-DQ7 - Data Input/Output
  8. SQW - Square Wave Output
  9. RST - Reset
  10. X1 - Crystal Connection
  11. X2 - Crystal Connection
  12. VBAT - Battery Input
  13. NC - No Connect
  14. NC - No Connect
  15. NC - No Connect
  16. NC - No Connect
  17. NC - No Connect
  18. NC - No Connect
  19. NC - No Connect
  20. NC - No Connect
  21. NC - No Connect
  22. NC - No Connect
  23. NC - No Connect
  24. NC - No Connect

Functional Features

  • Nonvolatile timekeeping and alarm functions
  • Power-fail control logic for battery backup
  • Automatic switchover to battery when power fails
  • Low-power CMOS technology
  • Easy integration as a replacement for standard SRAMs

Advantages and Disadvantages

Advantages: - Integration of RAM, RTC, and battery backup circuitry reduces component count and board space. - Nonvolatile timekeeping ensures accurate timekeeping even during power outages. - Easy replacement for existing SRAMs due to compatibility.

Disadvantages: - Limited memory size (16K x 8 bits) compared to standalone SRAMs. - Clock accuracy may vary with temperature and aging.

Working Principles

The DS1216H combines a static RAM, real-time clock, and battery backup circuitry in a single package. The static RAM provides volatile storage for data, while the real-time clock keeps track of time and provides alarm functions. The battery backup circuitry ensures that the clock and RAM retain their data even during power outages. When the main power supply fails, the DS1216H automatically switches to battery power, allowing uninterrupted timekeeping and data retention.

Detailed Application Field Plans

The DS1216H is commonly used in applications where nonvolatile timekeeping and data retention are crucial. Some typical application fields include:

  1. Embedded Systems: Used in microcontroller-based systems to maintain accurate time and preserve critical data during power interruptions.
  2. Industrial Automation: Integrated into control systems to ensure precise time synchronization and data integrity.
  3. Medical Devices: Employed in medical equipment to record timestamps and maintain accurate time for event logging.
  4. Security Systems: Utilized in access control systems, surveillance devices, and alarm panels to maintain accurate time for event sequencing.

Detailed and Complete Alternative Models

  1. DS1216E: Similar to DS1216H but with a different pin configuration.
  2. DS1216F: Enhanced version with additional features like tamper detection and extended memory size.
  3. DS1216G: Low-power variant designed for battery-operated applications.
  4. DS1216I: High-temperature version suitable for harsh environments.

These alternative models offer similar functionality but may have variations in pin configuration, additional features, or operating characteristics.

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Sebutkan 10 pertanyaan dan jawaban umum terkait penerapan DS1216H dalam solusi teknis

Sure! Here are 10 common questions and answers related to the application of DS1216H in technical solutions:

  1. Q: What is DS1216H? A: DS1216H is a real-time clock (RTC) module with non-volatile RAM (NVRAM) functionality.

  2. Q: How does DS1216H work? A: DS1216H combines a battery-backed RTC with a non-volatile SRAM, allowing it to retain data even when power is lost.

  3. Q: What are the typical applications of DS1216H? A: DS1216H is commonly used in applications that require accurate timekeeping and non-volatile storage, such as industrial automation, data loggers, and embedded systems.

  4. Q: Can DS1216H be used as a standalone device? A: No, DS1216H needs to be connected to a microcontroller or other host system for communication and control.

  5. Q: How is DS1216H powered? A: DS1216H is powered by an external battery, typically a coin cell battery, which provides backup power to the RTC and NVRAM.

  6. Q: What is the capacity of the non-volatile SRAM in DS1216H? A: DS1216H has a non-volatile SRAM capacity of 16 kilobits (2 kilobytes).

  7. Q: Can DS1216H be easily integrated into existing designs? A: Yes, DS1216H is designed to be compatible with standard microcontroller interfaces, making it relatively easy to integrate into existing designs.

  8. Q: Does DS1216H support automatic leap year compensation? A: Yes, DS1216H has built-in leap year compensation, ensuring accurate timekeeping even during leap years.

  9. Q: Can DS1216H be used in battery-powered devices? A: Yes, DS1216H is suitable for battery-powered devices as it has low power consumption and can operate on a wide voltage range.

  10. Q: Is DS1216H resistant to power interruptions? A: Yes, DS1216H has a power-fail control circuitry that ensures data integrity during power interruptions by automatically switching to the backup battery.

Please note that these answers are general and may vary depending on the specific implementation and configuration of DS1216H in different technical solutions.