AT28C256-20JC

Product Overview

Category

AT28C256-20JC belongs to the category of electrically erasable programmable read-only memory (EEPROM) chips.

Use

This product is commonly used in electronic devices for storing and retrieving data. It provides non-volatile storage, meaning that the data remains even when power is removed.

Characteristics

• Electrically erasable: The AT28C256-20JC can be erased and reprogrammed electrically, without requiring any additional equipment.
• High capacity: With a capacity of 256 kilobits (32 kilobytes), this chip offers ample storage space for various applications.
• Fast operation: The AT28C256-20JC operates at a speed of 200 nanoseconds, allowing for quick data access.

Package

The AT28C256-20JC comes in a 32-pin PLCC (Plastic Leaded Chip Carrier) package.

Essence

The essence of this product lies in its ability to provide reliable and non-volatile data storage in electronic devices.

Packaging/Quantity

The AT28C256-20JC is typically packaged in reels or tubes, with a quantity of 25 units per reel/tube.

Specifications

• Supply voltage: 4.5V to 5.5V
• Operating temperature range: -40°C to +85°C
• Data retention: 10 years
• Endurance: 100,000 write cycles

Pin Configuration

The AT28C256-20JC has a total of 32 pins, which are assigned specific functions as follows:

1. A0-A14: Address inputs
2. CE: Chip enable input
3. OE: Output enable input
4. WE: Write enable input
5. VCC: Power supply
6. GND: Ground
7. DQ0-DQ7: Data input/output

Functional Features

• Byte-wise programmable: The AT28C256-20JC allows individual bytes to be programmed or erased, providing flexibility in data manipulation.
• High-speed operation: With a 200 nanosecond access time, this chip ensures efficient data retrieval.
• Low power consumption: The AT28C256-20JC is designed to minimize power usage, making it suitable for battery-powered devices.

Advantages and Disadvantages

Advantages

• Non-volatile storage: The data remains intact even when power is removed.
• Electrically erasable: No additional equipment is required for erasing or reprogramming.
• High capacity: Ample storage space for various applications.
• Fast operation: Quick data access with a 200 nanosecond access time.

Disadvantages

• Limited endurance: The chip has a maximum endurance of 100,000 write cycles.
• Relatively high cost: Compared to other memory options, EEPROM chips can be more expensive.

Working Principles

The AT28C256-20JC utilizes a floating-gate transistor structure to store data. When programming, a high voltage is applied to the gate, allowing electrons to tunnel through the insulating layer and become trapped in the floating gate. This trapped charge represents a logical "1" state. Erasing is achieved by applying a higher voltage, which removes the trapped charge and resets the memory cell to a logical "0" state.

Detailed Application Field Plans

The AT28C256-20JC finds application in various electronic devices, including but not limited to: - Microcontrollers - Embedded systems - Industrial control systems - Automotive electronics - Communication devices

Alternative Models

For those seeking alternative options, the following models provide similar functionality to the AT28C256-20JC: - AT28C256-15JC - AT28C256-25JC - AT28C256-30JC

These models offer different access times and endurance levels, allowing users to choose the most suitable option for their specific requirements.

In conclusion, the AT28C256-20JC is a versatile EEPROM chip that provides reliable and non-volatile data storage. With its high capacity, fast operation, and byte-wise programmability, it serves as an essential component in various electronic devices across multiple industries.