DS1643-85+ - English Editing Encyclopedia Entry

Product Overview

Category: Integrated Circuits (ICs)

Use: The DS1643-85+ is a non-volatile static RAM (NVSRAM) integrated circuit. It combines the functions of both RAM and non-volatile memory, providing data storage even when power is lost.

Characteristics: - Non-volatile memory - Static RAM functionality - Low power consumption - High reliability - Wide operating temperature range

Package: The DS1643-85+ is available in a 28-pin DIP (Dual Inline Package) format.

Essence: The essence of the DS1643-85+ lies in its ability to retain data even in the absence of power, making it suitable for applications where data integrity is crucial.

Packaging/Quantity: The DS1643-85+ is typically packaged in tubes or reels, with quantities varying based on customer requirements.

Specifications

• Memory Size: 64 kilobits (8 kilobytes)
• Supply Voltage: 4.5V to 5.5V
• Access Time: 85ns
• Operating Temperature Range: -40°C to +85°C
• Data Retention: Over 10 years
• Write Endurance: 1 million cycles

Detailed Pin Configuration

The DS1643-85+ features a 28-pin DIP package with the following pin configuration:

1. VCC - Power supply voltage
2. GND - Ground
3. CE - Chip Enable
4. OE - Output Enable
5. WE - Write Enable
6. A0-A14 - Address inputs
7. DQ0-DQ7 - Data inputs/outputs
8. SQW - Square Wave Output
9. RST - Reset
10. NC - No Connection

Functional Features

• Non-volatile storage: The DS1643-85+ retains data even when power is lost, ensuring data integrity and reliability.
• Static RAM functionality: It operates as a standard RAM, allowing fast read and write access to stored data.
• Low power consumption: The integrated circuit consumes minimal power during operation, making it suitable for battery-powered devices.
• High reliability: With a long data retention period and high write endurance, the DS1643-85+ offers reliable data storage.
• Wide operating temperature range: It can operate in extreme temperature conditions, ranging from -40°C to +85°C.

Advantages and Disadvantages

Advantages: - Data integrity: Retains data during power loss - Fast access time: 85ns access time allows quick retrieval of stored information - Low power consumption: Ideal for energy-efficient applications - High reliability: Long data retention and write endurance ensure data integrity

Disadvantages: - Limited storage capacity: 64 kilobits may not be sufficient for certain applications requiring larger memory sizes - Higher cost compared to traditional RAM: The inclusion of non-volatile memory functionality increases the overall cost of the IC

Working Principles

The DS1643-85+ combines the principles of static RAM and non-volatile memory. It utilizes a small onboard battery to provide power during periods of power loss, allowing the non-volatile memory to retain data. When power is restored, the device operates as a standard static RAM, enabling fast read and write access to the stored data.

Detailed Application Field Plans

The DS1643-85+ finds applications in various fields, including: 1. Industrial control systems 2. Automotive electronics 3. Medical equipment 4. Aerospace and defense systems 5. Communication devices

In industrial control systems, the DS1643-85+ ensures that critical data is preserved during power outages, preventing loss of important information. In automotive electronics, it can be used for storing vehicle parameters and diagnostic data. Medical equipment benefits from its ability to retain patient data in case of power failure. Aerospace and defense systems rely on the DS1643-85+ to store mission-critical information. Communication devices utilize it for data buffering and storage.

Detailed and Complete Alternative Models

1. DS1230AB-120+: 12 kilobit non-volatile SRAM with a 120ns access time.
2. FM1608-120-PG: 64 kilobit non-volatile FRAM with a 120ns access time.
3. M48Z08-100PC1: 8 kilobyte non-volatile static RAM with a 100ns access time.

These alternative models offer similar functionality to the DS1643-85+, providing non-volatile memory combined with RAM capabilities. However, they may differ in terms of storage capacity, access time, and package type.

In conclusion, the DS1643-85+ is a versatile integrated circuit that combines the advantages of non-volatile memory and static