AT28C256EF-15JU

Product Overview

Category

AT28C256EF-15JU 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 that needs to be retained even when power is turned off.

Characteristics

• Electrically erasable: The AT28C256EF-15JU can be erased and reprogrammed electronically, making it convenient for updating data.
• High storage capacity: With a capacity of 256 kilobits, this EEPROM chip can store a significant amount of data.
• Low power consumption: The chip operates on low power, making it suitable for battery-powered devices.
• Fast access time: The AT28C256EF-15JU offers fast access times, allowing for efficient data retrieval.

Package

The AT28C256EF-15JU is available in a standard JEDEC 32-lead PLCC package.

Essence

The essence of this product lies in its ability to provide non-volatile storage for electronic devices, ensuring data retention even without power.

Packaging/Quantity

The AT28C256EF-15JU is typically packaged in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Supply voltage: 2.7V to 5.5V
• Operating temperature range: -40°C to +85°C
• Access time: 150ns
• Organization: 32K x 8 bits
• Erase/write cycles: 100,000 cycles
• Data retention: 10 years

Detailed Pin Configuration

The AT28C256EF-15JU has a total of 32 pins. Here is the detailed pin configuration:

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 AT28C256EF-15JU allows individual bytes to be programmed or erased, providing flexibility in data manipulation.
• Hardware and software protection: This EEPROM chip offers protection mechanisms to prevent accidental writes or unauthorized access to stored data.
• High reliability: With a high endurance of 100,000 erase/write cycles and data retention of 10 years, the AT28C256EF-15JU ensures reliable long-term storage.

Advantages and Disadvantages

Advantages

• Electrically erasable and reprogrammable
• High storage capacity
• Low power consumption
• Fast access time
• Flexible byte-wise programming
• Reliable endurance and data retention

Disadvantages

• Limited erase/write cycles compared to other non-volatile memory technologies
• Relatively higher cost per bit compared to some alternative memory options

Working Principles

The AT28C256EF-15JU utilizes a combination of electronic circuits and floating gate transistors to store and retrieve data. When data needs to be written, the appropriate address is selected, and the desired data is applied to the input pins. The write enable signal triggers the programming process, which modifies the charge on the floating gate transistors. To read data, the address is provided, and the output enable signal enables the data to be accessed from the chip.

Detailed Application Field Plans

The AT28C256EF-15JU finds applications in various electronic devices, including but not limited to: - Microcontrollers - Embedded systems - Industrial control systems - Automotive electronics - Communication devices

Detailed and Complete Alternative Models

1. AT28C256-15PU: Similar to AT28C256EF-15JU, but in a different package (PDIP)
2. AT28C256E-15PI: Similar to AT28C256EF-15JU, but with extended temperature range (-40°C to +125°C)
3. AT28C256F-15DM/883: Military-grade version with enhanced ruggedness and reliability

These alternative models offer similar functionality and characteristics, providing options for different application requirements.

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