AT27C256R-45JU

Product Overview

Category

AT27C256R-45JU belongs to the category of programmable read-only memory (PROM) chips.

Use

This product is primarily used for storing data that needs to be permanently written and cannot be modified or erased. It is commonly used in applications where non-volatile memory is required.

Characteristics

• Non-volatile: The stored data remains intact even when power is removed.
• High storage capacity: The AT27C256R-45JU has a capacity of 256 kilobits (32 kilobytes).
• Fast access time: The chip operates at a speed of 45 nanoseconds, allowing for quick retrieval of data.
• Low power consumption: The device is designed to consume minimal power during operation.

Package

The AT27C256R-45JU is available in a plastic J-lead chip carrier package.

Essence

The essence of this product lies in its ability to provide reliable and permanent storage of data in electronic systems.

Packaging/Quantity

The AT27C256R-45JU is typically packaged in reels or tubes, with each reel or tube containing a specific quantity of chips. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Memory Capacity: 256 kilobits (32 kilobytes)
• Access Time: 45 nanoseconds
• Supply Voltage: 4.5V - 5.5V
• Operating Temperature Range: -40°C to +85°C
• Package Type: J-lead chip carrier

Detailed Pin Configuration

The AT27C256R-45JU has a total of 28 pins. The pin configuration is as follows:

1. A14
2. A12
3. A7
4. A6
5. A5
6. A4
7. A3
8. A2
9. A1
10. A0
11. /OE (Output Enable)
12. A8
13. A9
14. A11
15. A10
16. VCC (Supply Voltage)
17. Q7
18. Q6
19. Q5
20. Q4
21. Q3
22. Q2
23. Q1
24. Q0
25. /CE (Chip Enable)
26. /WE (Write Enable)
27. /BYTE (Byte/Word Organization)
28. GND (Ground)

Functional Features

• Non-volatile storage: The AT27C256R-45JU retains data even when power is removed.
• High-speed access: The chip allows for quick retrieval of stored data with a fast access time of 45 nanoseconds.
• Low power consumption: The device is designed to consume minimal power during operation, making it suitable for battery-powered applications.
• Easy integration: The chip can be easily integrated into various electronic systems due to its standard pin configuration.

Advantages and Disadvantages

Advantages

• Reliable and permanent storage of data.
• Fast access time for quick retrieval of information.
• Low power consumption for energy-efficient operation.
• Easy integration into electronic systems.

Disadvantages

• Data cannot be modified or erased once programmed.
• Limited storage capacity compared to other memory technologies.
• Relatively higher cost compared to volatile memory options.

Working Principles

The AT27C256R-45JU operates based on the principle of electrical charge trapping in non-volatile memory cells. The data is programmed into the memory cells during the manufacturing process and remains stored even when power is removed. The chip utilizes address lines to select specific memory locations and control lines to enable reading from or writing to the memory.

Detailed Application Field Plans

The AT27C256R-45JU finds applications in various fields, including: 1. Embedded systems: Used for firmware storage in microcontrollers and other embedded devices. 2. Automotive electronics: Used for storing calibration data, configuration settings, and code in automotive electronic control units (ECUs). 3. Industrial automation: Used for storing program code and configuration data in programmable logic controllers (PLCs) and industrial control systems. 4. Consumer electronics: Used in devices such as gaming consoles, set-top boxes, and audio/video equipment for firmware storage.

Detailed and Complete Alternative Models

Some alternative models to the AT27C256R-45JU include: - AT28C256-15PU - AM27C256-150DC - M27C256B-12F1 - SST27SF256-70-3C-PGE

These alternative models offer similar functionality and characteristics, but may have variations in package type, access time, or supply voltage. It is important to refer to the respective datasheets for detailed specifications and compatibility with specific applications