AT28C256E-15PU

Product Overview

Category

AT28C256E-15PU belongs to the category of electrically erasable programmable read-only memory (EEPROM) chips.

Use

This product is commonly used in electronic devices for non-volatile data storage. It allows users to write, erase, and reprogram data multiple times without requiring a power supply.

Characteristics

• Non-volatile: Retains data even when power is disconnected.
• Electrically erasable: Can be erased and reprogrammed electronically.
• High storage capacity: The AT28C256E-15PU has a storage capacity of 256 kilobits (32 kilobytes).
• Low power consumption: Operates on low power, making it suitable for battery-powered devices.

Package

The AT28C256E-15PU comes in a plastic DIP (Dual In-line Package) with 28 pins. This package provides easy integration into circuit boards and ensures reliable connections.

Essence

The essence of this product lies in its ability to store and retrieve data reliably, while allowing for easy modification when needed.

Packaging/Quantity

The AT28C256E-15PU is typically packaged in tubes or trays, with each tube or tray containing a specific quantity of chips. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Supply voltage: 4.5V to 5.5V
• Operating temperature range: -40°C to +85°C
• Access time: 150 nanoseconds
• Endurance: 100,000 write/erase cycles
• Data retention: 10 years

Detailed Pin Configuration

The AT28C256E-15PU has a total of 28 pins, which are assigned specific functions as follows:

1. A0-A14: Address input pins
2. CE: Chip Enable (active low)
3. OE: Output Enable (active low)
4. WE: Write Enable (active low)
5. VCC: Power supply voltage
6. GND: Ground

The remaining pins are not used or reserved for internal functions.

Functional Features

• High-speed operation: The AT28C256E-15PU offers fast access times, allowing for efficient data retrieval and modification.
• Easy integration: The DIP package and standard pin configuration make it compatible with various electronic devices and systems.
• Reliable data storage: The EEPROM technology ensures data integrity even in harsh environmental conditions.
• Low power consumption: The chip operates on low power, making it suitable for battery-powered applications.

Advantages and Disadvantages

Advantages

• Non-volatile memory: Data is retained even without power.
• Electrically erasable: Allows for easy modification of stored data.
• High storage capacity: Offers ample space for data storage needs.
• Compatibility: Can be integrated into various electronic devices and systems.
• Reliability: Ensures data integrity and longevity.

Disadvantages

• Limited endurance: The chip has a finite number of write/erase cycles.
• Relatively slower access time compared to other memory technologies.
• Higher cost compared to some alternative memory solutions.

Working Principles

The AT28C256E-15PU utilizes EEPROM technology, which allows for electrical erasure and reprogramming of data. It consists of a grid of memory cells that can be individually addressed using the input pins. When data needs to be written or erased, the appropriate control signals are applied to the chip's pins, enabling the desired operation.

Detailed Application Field Plans

The AT28C256E-15PU finds applications in various fields, including:

1. Consumer electronics: Used in devices such as digital cameras, MP3 players, and smartwatches for data storage and firmware updates.
2. Automotive industry: Employed in electronic control units (ECUs) for storing calibration data, configuration settings, and software updates.
3. Industrial automation: Utilized in programmable logic controllers (PLCs) to store program code and configuration parameters.
4. Medical devices: Integrated into medical equipment for storing patient data, device settings, and firmware updates.

Detailed and Complete Alternative Models

1. AT28C256-15PU: Similar to the AT28C256E-15PU, but without the extended temperature range (-40°C to +85°C).
2. AT28C256R-15PU: Offers similar specifications but with a different programming algorithm.
3. AT28C256F-15PU: Provides additional security features such as hardware write protection and one-time programmable (OTP) memory cells.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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