AT28C256-25FM/883-949

Product Overview

Category

AT28C256-25FM/883-949 belongs to the category of non-volatile memory devices.

Use

This product is primarily used for storing and retrieving digital information in electronic systems.

Characteristics

• Non-volatile: The stored data is retained even when power is removed.
• High capacity: The AT28C256-25FM/883-949 has a storage capacity of 256 kilobits (32 kilobytes).
• Fast access time: It operates at a speed of 250 nanoseconds, allowing for quick data retrieval.
• Low power consumption: The device is designed to minimize power usage, making it suitable for battery-powered applications.

Package

The AT28C256-25FM/883-949 is available in a 28-pin ceramic dual in-line package (DIP).

Essence

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

Packaging/Quantity

The AT28C256-25FM/883-949 is typically packaged in tubes or trays, with a quantity of 25 units per tube/tray.

Specifications

• Operating voltage: 4.5V to 5.5V
• Access time: 250 ns
• Organization: 32K x 8 bits
• Endurance: 10,000 write cycles
• Data retention: 100 years
• Temperature range: -55°C to +125°C

Detailed Pin Configuration

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

Functional Features

• Byte-wide access: The AT28C256-25FM/883-949 allows for individual byte-level read and write operations.
• Easy interfacing: It supports standard microcontroller interfaces, making it compatible with a wide range of systems.
• Hardware data protection: The device features a write enable (WE#) pin and a chip enable (CE#) pin to prevent accidental writes.

Advantages and Disadvantages

Advantages

• Non-volatile storage ensures data retention even during power loss.
• High storage capacity for various applications.
• Fast access time enables quick data retrieval.
• Low power consumption extends battery life in portable devices.

Disadvantages

• Limited endurance of 10,000 write cycles may be a constraint in certain applications.
• Relatively higher cost compared to other memory technologies.

Working Principles

The AT28C256-25FM/883-949 is based on Electrically Erasable Programmable Read-Only Memory (EEPROM) technology. It utilizes a grid of floating-gate transistors to store digital information. Data can be written to the memory by applying appropriate voltage levels to the control pins. The stored data can be read by activating the output enable (OE#) pin.

Detailed Application Field Plans

The AT28C256-25FM/883-949 finds applications in various fields, including: 1. Embedded systems: Used for firmware storage in microcontrollers and other embedded devices. 2. Automotive electronics: Provides non-volatile storage for critical data in automotive systems. 3. Industrial control systems: Used for storing configuration settings and program code in industrial automation applications. 4. Medical devices: Enables reliable storage of patient data and device settings in medical equipment.

Detailed and Complete Alternative Models

1. AT28C256-12PC
2. AT28C256-15PU
3. AT28C256-20PI
4. AT28C256-25DM/883
5. AT28C256-30DM/883

These alternative models offer similar functionality and capacity but may differ in terms of package type, temperature range, or access time.

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