AT28C256-25UM/883-815

Product Overview

Category

AT28C256-25UM/883-815 belongs to the category of electrically erasable programmable read-only memory (EEPROM) chips.

Use

This product is primarily used for non-volatile storage of digital data in various electronic devices such as microcontrollers, computers, and consumer electronics.

Characteristics

• Non-volatile: The stored data remains intact even when power is removed.
• Electrically erasable: The memory can be erased and reprogrammed electronically.
• High capacity: The AT28C256-25UM/883-815 has a storage capacity of 256 kilobits (32 kilobytes).
• Fast access time: It operates at a speed of 250 nanoseconds.
• Extended temperature range: This chip is designed to operate reliably in harsh environments, with a temperature range of -55°C to +125°C.

Package

The AT28C256-25UM/883-815 comes in a 28-pin ceramic dual in-line package (DIP).

Essence

This EEPROM chip allows for reliable and non-volatile storage of digital data, making it an essential component in many electronic systems.

Packaging/Quantity

The AT28C256-25UM/883-815 is typically packaged in tubes or trays, with quantities varying based on customer requirements.

Specifications

• Memory Capacity: 256 kilobits (32 kilobytes)
• Access Time: 250 nanoseconds
• Supply Voltage: 4.5V to 5.5V
• Operating Temperature Range: -55°C to +125°C
• Package Type: 28-pin ceramic DIP

Detailed Pin Configuration

1. A0: Address Input
2. A1: Address Input
3. A2: Address Input
4. A3: Address Input
5. A4: Address Input
6. A5: Address Input
7. A6: Address Input
8. A7: Address Input
9. A8: Address Input
10. A9: Address Input
11. A10: Address Input
12. A11: Address Input
13. A12: Address Input
14. A13: Address Input
15. A14: Address Input
16. A15: Address Input
17. OE: Output Enable
18. CE: Chip Enable
19. WE: Write Enable
20. VCC: Supply Voltage
21. D0: Data Input/Output
22. D1: Data Input/Output
23. D2: Data Input/Output
24. D3: Data Input/Output
25. D4: Data Input/Output
26. D5: Data Input/Output
27. D6: Data Input/Output
28. D7: Data Input/Output

Functional Features

• High-speed read and write operations
• Low power consumption
• Automatic erase-before-write capability
• Hardware and software data protection mechanisms
• Extended temperature range for reliable operation in extreme conditions

Advantages and Disadvantages

Advantages

• Non-volatile storage of digital data
• Electrically erasable and reprogrammable
• High capacity for storing large amounts of data
• Fast access time for quick retrieval of information
• Reliable operation in harsh environments

Disadvantages

• Limited endurance: EEPROMs have a finite number of erase/write cycles before they may become unreliable.
• Relatively higher cost compared to other types of memory.

Working Principles

The AT28C256-25UM/883-815 operates based on the principles of electrically erasable programmable read-only memory. It uses a combination of transistors and floating gate technology to store and retrieve digital data. The stored data can be erased and reprogrammed electronically, allowing for flexibility in data storage.

Detailed Application Field Plans

The AT28C256-25UM/883-815 finds applications in various fields, including:

1. Microcontrollers: Used for storing firmware, configuration data, and lookup tables.
2. Computers: Used for storing BIOS (Basic Input/Output System) and other critical system data.
3. Consumer Electronics: Used in devices such as smart TVs, set-top boxes, and gaming consoles for firmware storage and data retention.

Detailed and Complete Alternative Models

1. AT28C256-12PC: Similar EEPROM chip with a slower access time of 1200 nanoseconds.
2. AT28C256-15PI: Another alternative with a faster access time of 150 nanoseconds.
3. AT28C256-20DM/883: A military-grade version designed for rugged environments.

These alternative models offer similar functionality but may have different specifications or package types.

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