DS1644P-120

Product Overview

Category

The DS1644P-120 belongs to the category of non-volatile static RAM (NVSRAM).

Use

It is primarily used for storing data in applications where non-volatility is required, such as in critical systems that need to retain information even during power loss or system shutdown.

Characteristics

• Non-volatile: The DS1644P-120 retains data even when power is disconnected.
• Static RAM: It provides fast read and write access times.
• High density: The DS1644P-120 offers a large storage capacity.
• Low power consumption: It operates efficiently, consuming minimal power.
• Reliable: The DS1644P-120 ensures data integrity through various error detection and correction mechanisms.

Package

The DS1644P-120 is available in a standard 28-pin DIP (Dual Inline Package) format.

Essence

The essence of the DS1644P-120 lies in its ability to combine the benefits of non-volatility with the speed and reliability of static RAM. This makes it an ideal choice for applications requiring both data retention and high-performance memory.

Packaging/Quantity

The DS1644P-120 is typically packaged individually and is available in various quantities depending on the manufacturer's specifications.

Specifications

• Operating voltage: 4.5V to 5.5V
• Capacity: 16 kilobits (2 kilobytes)
• Access time: 120 nanoseconds
• Data retention: Over 10 years
• Write endurance: 1 million cycles
• Temperature range: -40°C to +85°C

Detailed Pin Configuration

The DS1644P-120 follows a standard pin configuration for 28-pin DIP packages:

1. Chip Enable (CE)
2. Output Enable (OE)
3. Write Enable (WE)
4. Address Inputs (A0-A10)
5. Data Inputs/Outputs (DQ0-DQ7)
6. Ground (GND)
7. VCC 8-28. No Connection (NC)

Functional Features

• Non-volatile storage: The DS1644P-120 uses an integrated lithium energy source to retain data even in the absence of power.
• Fast access times: It provides quick read and write operations, making it suitable for time-critical applications.
• Automatic store on power loss: The DS1644P-120 automatically saves data to non-volatile memory when power is lost, ensuring data integrity.
• Hardware write protection: It offers write protection features to prevent accidental modification of stored data.
• Error detection and correction: The DS1644P-120 includes error detection and correction mechanisms to maintain data accuracy.

Advantages and Disadvantages

Advantages

• Non-volatility ensures data retention during power loss or system shutdown.
• High-performance static RAM allows for fast read and write operations.
• Large storage capacity meets the requirements of data-intensive applications.
• Low power consumption results in efficient operation and extended battery life.
• Reliable error detection and correction mechanisms ensure data integrity.

Disadvantages

• Relatively higher cost compared to traditional volatile RAM.
• Limited availability of alternative models from different manufacturers.

Working Principles

The DS1644P-120 combines a static RAM array with non-volatile memory elements. It utilizes a small integrated lithium energy source to provide power for data retention. When power is applied, the DS1644P-120 operates as a standard static RAM, allowing fast read and write access. In the event of power loss, it automatically transfers the data from the volatile RAM to the non-volatile memory, ensuring that the information is preserved. Upon power restoration, the DS1644P-120 transfers the data back to the static RAM for normal operation.

Detailed Application Field Plans

The DS1644P-120 finds applications in various fields, including:

1. Critical systems: Used in aerospace, defense, and medical equipment where data integrity is crucial.
2. Industrial automation: Employed in control systems that require non-volatile storage for configuration parameters and logged data.
3. Energy management: Utilized in smart meters and energy monitoring devices to store consumption data during power outages.
4. Automotive electronics: Integrated into automotive systems for storing critical information like fault codes and sensor data.
5. Communication infrastructure: Used in networking equipment to retain configuration settings and maintain network stability during power interruptions.

Detailed and Complete Alternative Models

While the DS1644P-120 is a popular choice, there are alternative models available from different manufacturers that offer similar functionality. Some notable alternatives include:

1. STMicroelectronics M48Z02
2. Maxim Integrated DS1230AB
3. Microchip Technology 23LCV1024

These alternatives provide comparable non-volatile static RAM solutions with varying specifications and package options.

In conclusion, the DS164