DS1643P-70+ Encyclopedia Entry

Product Overview

Category

The DS1643P-70+ belongs to the category of non-volatile static RAM (NVSRAM) integrated circuits.

Use

This product is commonly used as a memory device in various electronic systems, such as computers, industrial control systems, and consumer electronics.

Characteristics

• Non-volatile: The DS1643P-70+ retains data even when power is removed.
• Static RAM: Provides fast read and write access times.
• Integrated Circuit: Compact and easily integrated into electronic systems.

Package

The DS1643P-70+ is available in a standard 28-pin DIP (Dual Inline Package) format.

Essence

The essence of the DS1643P-70+ lies in its ability to combine the benefits of non-volatile memory with the speed and convenience of static RAM.

Packaging/Quantity

The DS1643P-70+ is typically packaged in reels or tubes, with a quantity of 50 units per package.

Specifications

• Operating Voltage: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Memory Capacity: 64 kilobits (8 kilobytes)
• Access Time: 70 nanoseconds
• Data Retention: Over 10 years

Detailed Pin Configuration

The DS1643P-70+ has a total of 28 pins, each serving a specific function. Here is a detailed pin configuration:

1. VCC: Power supply voltage
2. GND: Ground reference
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/INT: Square Wave Output/Interrupt
9. RST: Reset input
10. VBAT: Battery backup voltage

Functional Features

• Non-volatile data storage: The DS1643P-70+ retains data even when power is removed, ensuring data integrity.
• Fast access times: With an access time of 70 nanoseconds, it provides quick read and write operations.
• Battery backup: The integrated battery backup ensures data retention during power outages or system shutdowns.
• Square wave output: The SQW pin can be used to generate a square wave signal for timing applications.
• Interrupt capability: The INT pin can be used to trigger an interrupt in the connected system.

Advantages and Disadvantages

Advantages

• Non-volatile memory eliminates the need for external storage devices.
• Fast access times improve system performance.
• Battery backup ensures data integrity during power interruptions.
• Compact size allows for easy integration into various electronic systems.

Disadvantages

• Limited memory capacity compared to other storage solutions.
• Relatively higher cost compared to traditional RAM modules.
• Requires additional circuitry for battery backup functionality.

Working Principles

The DS1643P-70+ combines volatile static RAM with non-volatile memory elements. When power is supplied, the device operates as a standard static RAM, allowing fast read and write operations. However, it also includes a built-in battery backup that keeps the non-volatile memory cells powered, ensuring data retention even when the main power source is disconnected.

Detailed Application Field Plans

The DS1643P-70+ finds applications in various fields, including:

1. Computer Systems: Used as a cache memory for faster data access.
2. Industrial Control Systems: Provides reliable data storage for critical control parameters.
3. Consumer Electronics: Used in devices like digital cameras and printers for temporary data storage.

Detailed and Complete Alternative Models

1. DS1243Y-120+: Similar to the DS1643P-70+, but with a larger memory capacity of 128 kilobits.
2. M48Z02-150PC1: Offers similar functionality with a lower access time of 150 nanoseconds.
3. FM1608-120-PG: Non-volatile RAM with a capacity of 16 kilobits and an access time of 120 nanoseconds.

These alternative models provide similar features and can be considered based on specific requirements and system constraints.

In conclusion, the DS1643P-70+ is a non-volatile static RAM integrated circuit that combines the benefits of non-volatile memory with the speed and convenience of static RAM. With its fast access times, battery backup, and compact size, it finds applications in various electronic systems.