AT28C040-25BC

Product Overview

Category

AT28C040-25BC belongs to the category of non-volatile memory devices.

Use

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

Characteristics

• Non-volatile: Retains data even when power is turned off.
• High capacity: The AT28C040-25BC has a storage capacity of 4 megabits (512 kilobytes).
• Fast access time: It operates at a speed of 250 nanoseconds.
• Low power consumption: Designed to minimize power usage.
• Reliable: Offers high endurance and data retention capabilities.

Package

The AT28C040-25BC is available in a standard 32-pin PDIP (Plastic Dual In-line Package) format.

Essence

This product is an EEPROM (Electrically Erasable Programmable Read-Only Memory) chip that allows for non-volatile data storage.

Packaging/Quantity

The AT28C040-25BC is typically packaged in tubes or trays, with each package containing a specific quantity of chips. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Storage Capacity: 4 Megabits (512 Kilobytes)
• Access Time: 250 Nanoseconds
• Supply Voltage: 5V
• Operating Temperature Range: -40°C to +85°C
• Data Retention: Minimum 10 years

Pin Configuration

The AT28C040-25BC features a total of 32 pins, each serving a specific function. The pin configuration is as follows:

1. A16
2. A15
3. A12
4. A7
5. A6
6. A5
7. A4
8. A3
9. A2
10. A1
11. A0
12. VCC
13. OE#
14. CE#
15. WE#
16. I/O0
17. I/O1
18. I/O2
19. I/O3
20. I/O4
21. I/O5
22. I/O6
23. I/O7
24. NC
25. GND
26. A8
27. A9
28. A11
29. A10
30. A14
31. A13
32. WP#

Functional Features

• Byte-wise programmable: Allows individual bytes to be programmed or erased.
• Easy interface integration: Compatible with standard microcontrollers and digital systems.
• Hardware data protection: Write protection feature prevents accidental modification of stored data.
• High-speed operation: Enables fast read and write operations.

Advantages and Disadvantages

Advantages

• Non-volatile memory: Data retention even without power supply.
• High storage capacity: Suitable for applications requiring large amounts of data storage.
• Fast access time: Quick retrieval of information.
• Low power consumption: Energy-efficient operation.
• Reliable and durable: Designed for long-term use.

Disadvantages

• Limited rewrite cycles: EEPROMs have a finite number of erase/write cycles.
• Higher cost compared to other memory technologies.
• Larger physical size compared to some newer memory devices.

Working Principles

The AT28C040-25BC utilizes EEPROM technology, which allows for the electrical erasure and reprogramming of data. It consists of a grid of memory cells that can be individually addressed and modified. The data is stored in floating gate transistors, which retain their charge even when power is removed. To modify the data, specific voltage levels are applied to the control pins, enabling programming or erasing of individual memory cells.

Detailed Application Field Plans

The AT28C040-25BC finds applications in various fields, including: - Embedded systems - Automotive electronics - Industrial control systems - Consumer electronics - Communication devices

Detailed and Complete Alternative Models

1. AT28C010-12PC: 1 Megabit (128 Kilobytes) capacity, 120 nanoseconds access time.
2. AT28C256-15PU: 256 Kilobit (32 Kilobytes) capacity, 150 nanoseconds access time.
3. AT28C64B-15PU: 64 Kilobit (8 Kilobytes) capacity, 150 nanoseconds access time.

These alternative models offer different storage capacities and access times to suit specific application requirements.

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