AT28C256-90JI

Product Overview

Category

AT28C256-90JI belongs to the category of non-volatile memory integrated circuits.

Use

It is primarily used for storing and retrieving digital information in electronic devices.

Characteristics

• Non-volatile: Retains data even when power is turned off.
• High capacity: The AT28C256-90JI has a storage capacity of 256 kilobits (32 kilobytes).
• Fast access time: It operates at a speed of 90 nanoseconds.
• Low power consumption: Designed to minimize power usage.
• Durable: Can withstand multiple read and write cycles without degradation.

Package

The AT28C256-90JI is available in a JEDEC-standard 28-pin plastic dual in-line package (PDIP).

Essence

The essence of AT28C256-90JI lies in its ability to provide reliable and non-volatile storage for digital data in various electronic applications.

Packaging/Quantity

This product is typically packaged in reels or tubes, with a quantity of 25 units per tube.

Specifications

• Memory Type: Electrically Erasable Programmable Read-Only Memory (EEPROM)
• Organization: 32K x 8 bits
• Supply Voltage: 4.5V - 5.5V
• Operating Temperature Range: -40°C to +85°C
• Data Retention: 10 years
• Endurance: 1,000,000 write cycles

Detailed Pin Configuration

The AT28C256-90JI has a total of 28 pins, each serving a specific function. Here is the detailed pin configuration:

1. A0-A14: Address Inputs
2. CE: Chip Enable
3. OE: Output Enable
4. WE: Write Enable
5. I/O0-I/O7: Data Input/Output
6. VCC: Power Supply
7. GND: Ground

Functional Features

• Random access: Allows direct access to any memory location.
• Byte-wise programmable: Enables individual byte programming.
• Block erase capability: Supports erasing of specific blocks of memory.
• Hardware and software data protection: Provides security features to prevent unauthorized access or modification.

Advantages and Disadvantages

Advantages

• Non-volatile storage ensures data retention even during power loss.
• High capacity allows for storing large amounts of data.
• Fast access time enables quick retrieval of information.
• Low power consumption prolongs battery life in portable devices.
• Durable design withstands frequent read and write operations.

Disadvantages

• Limited endurance compared to other types of memory.
• Relatively higher cost per bit compared to some alternatives.
• Requires additional circuitry for interfacing with microcontrollers or processors.

Working Principles

The AT28C256-90JI utilizes a combination of electronic circuits and floating gate transistors to store and retrieve digital data. When writing data, the device applies a high voltage to the selected memory cells, altering the charge stored in the floating gate. Reading data involves sensing the charge level in the memory cells and converting it into digital signals.

Detailed Application Field Plans

The AT28C256-90JI finds applications in various fields, including:

1. Embedded Systems: Used for firmware storage in microcontrollers and embedded systems.
2. Automotive Electronics: Stores configuration data and code in automotive control units.
3. Industrial Automation: Utilized for program storage in PLCs (Programmable Logic Controllers).
4. Consumer Electronics: Used in devices like set-top boxes, gaming consoles, and smart TVs for data storage.

Detailed and Complete Alternative Models

1. AT28C256-12PI: Similar to AT28C256-90JI but operates at a speed of 120 nanoseconds.
2. AT28C256-15PU: Offers a slower access time of 150 nanoseconds but at a lower cost.
3. AT28C256-20PC: Provides a faster access time of 200 nanoseconds for applications requiring higher performance.

These alternative models offer different specifications to cater to specific requirements and constraints.

Word count: 550 words