AT28HC256E-12LM/883

Product Overview

Category

AT28HC256E-12LM/883 belongs to the category of high-speed, low-power Electrically Erasable Programmable Read-Only Memory (EEPROM) chips.

Use

This product is primarily used for non-volatile data storage in various electronic devices such as microcontrollers, computers, and communication systems.

Characteristics

• High-speed operation: The AT28HC256E-12LM/883 offers fast read and write operations, making it suitable for applications requiring quick access to stored data.
• Low power consumption: This EEPROM chip is designed to minimize power consumption, making it ideal for battery-powered devices.
• Large storage capacity: With a capacity of 256 kilobits (32 kilobytes), this chip can store a significant amount of data.
• Extended temperature range: The -12LM/883 variant is designed to operate reliably in extreme temperature conditions, ranging from -55°C to +125°C.

Package

The AT28HC256E-12LM/883 comes in a 28-pin ceramic dual in-line package (DIP), which provides mechanical protection and facilitates easy integration into circuit boards.

Essence

The essence of the AT28HC256E-12LM/883 lies in its ability to provide reliable, non-volatile data storage with high-speed operation and low power consumption.

Packaging/Quantity

This product is typically packaged in tubes or trays, with each containing a specific quantity of chips. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Organization: 32K x 8 bits
• Supply voltage: 4.5V to 5.5V
• Access time: 120 ns
• Standby current: 100 μA (max)
• Operating temperature range: -55°C to +125°C
• Data retention: 10 years (minimum)
• Endurance: 100,000 write cycles (minimum)

Detailed Pin Configuration

The AT28HC256E-12LM/883 has a total of 28 pins. The pin configuration is as follows:

1. A16
2. A15
3. A14
4. A12
5. A7
6. A6
7. A5
8. A4
9. A3
10. A2
11. A1
12. A0
13. VCC
14. OE#
15. CE#
16. WE#
17. I/O0
18. I/O1
19. I/O2
20. I/O3
21. I/O4
22. I/O5
23. I/O6
24. I/O7
25. NC
26. GND
27. NC
28. NC

Functional Features

• High-speed operation allows for quick access to stored data.
• Low power consumption ensures efficient use in battery-powered devices.
• Non-volatile memory retains data even when power is disconnected.
• Easy integration into existing circuit designs due to standard pin configuration.
• Extended temperature range enables reliable operation in harsh environments.

Advantages and Disadvantages

Advantages

• Fast read and write operations
• Low power consumption
• Large storage capacity
• Reliable performance in extreme temperatures

Disadvantages

• Limited endurance (100,000 write cycles)
• Relatively higher cost compared to other non-volatile memory options

Working Principles

The AT28HC256E-12LM/883 utilizes EEPROM technology to store data. It consists of a grid of memory cells that can be electrically programmed and erased. When data needs to be written, the appropriate address is selected, and an electrical charge is applied to the memory cell, altering its state. Reading data involves selecting the desired address and retrieving the stored information from the memory cells.

Detailed Application Field Plans

The AT28HC256E-12LM/883 finds applications in various fields, including:

1. Microcontrollers: Used for storing firmware, configuration settings, and other critical data.
2. Computers: Employed in BIOS chips and other non-volatile memory requirements.
3. Communication systems: Utilized for storing network parameters, encryption keys, and system configurations.

Detailed and Complete Alternative Models

1. AT28C256: Similar capacity and functionality, but with a slower access time.
2. AT29C256: Flash memory alternative with faster erase times but limited endurance.
3. 24LC256: I2C-compatible EEPROM chip with lower power consumption and smaller package size.

These alternative models offer similar capabilities to the AT28HC256E-12LM/883, but with slight variations in features and specifications.

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