AT27C256R-12PA

Product Overview

Category

AT27C256R-12PA belongs to the category of programmable read-only memory (PROM) chips.

Use

This product is commonly used for storing and retrieving data in electronic devices. It provides non-volatile storage, meaning that the stored data remains even when power is removed.

Characteristics

• Non-volatile memory
• High storage capacity
• Fast access time
• Reliable and durable

Package

AT27C256R-12PA is available in a standard dual in-line package (DIP). This package type allows for easy integration into various electronic circuits.

Essence

The essence of AT27C256R-12PA lies in its ability to store large amounts of data reliably and provide quick access to that data when needed.

Packaging/Quantity

AT27C256R-12PA is typically packaged in reels or tubes, with each package containing a specific quantity of chips. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Part Number: AT27C256R-12PA
• Memory Size: 256 kilobits (32 kilobytes)
• Access Time: 120 nanoseconds
• Operating Voltage: 5 volts
• Organization: 32K x 8 bits
• Erase/Write Cycle Endurance: 10,000 cycles
• Data Retention: 20 years

Pin Configuration

The AT27C256R-12PA chip has a total of 28 pins. Here is the detailed pin configuration:

1. A14 - Address Input
2. A12 - Address Input
3. A7 - Address Input
4. A6 - Address Input
5. A5 - Address Input
6. A4 - Address Input
7. A3 - Address Input
8. A2 - Address Input
9. A1 - Address Input
10. A0 - Address Input
11. VPP - Programming Voltage Supply
12. WE - Write Enable
13. OE - Output Enable
14. CE - Chip Enable
15. I/O0 - Data Input/Output
16. I/O1 - Data Input/Output
17. I/O2 - Data Input/Output
18. I/O3 - Data Input/Output
19. I/O4 - Data Input/Output
20. I/O5 - Data Input/Output
21. I/O6 - Data Input/Output
22. I/O7 - Data Input/Output
23. NC - No Connection
24. GND - Ground
25. A8 - Address Input
26. A9 - Address Input
27. A11 - Address Input
28. A13 - Address Input

Functional Features

• High-speed access: The AT27C256R-12PA offers fast access times, allowing for efficient data retrieval.
• Non-volatile storage: The stored data remains intact even when power is removed, ensuring data integrity.
• Easy integration: The standard DIP package makes it easy to incorporate the chip into various electronic circuits.
• Reliable performance: The chip has a high endurance level and can retain data for an extended period.

Advantages and Disadvantages

Advantages

• Large storage capacity
• Fast access time
• Non-volatile memory
• Reliable and durable

Disadvantages

• Limited erase/write cycle endurance
• Requires external programming voltage (VPP)

Working Principles

The AT27C256R-12PA operates based on the principle of electrical charge trapping. It uses a grid of transistors to store binary data in the form of electrical charges. When specific addresses are accessed, the corresponding data is retrieved from the memory cells.

Detailed Application Field Plans

The AT27C256R-12PA is widely used in various electronic devices and systems, including: - Microcontrollers - Embedded systems - Industrial control systems - Automotive electronics - Communication equipment

Detailed and Complete Alternative Models

• AT28C256-15PU: Similar to AT27C256R-12PA but with a different access time (150 nanoseconds).
• AM27C256-120DC: Another alternative with similar specifications but a different package type (ceramic dual in-line package).

These alternative models provide similar functionality and can be used as replacements for AT27C256R-12PA in compatible applications.

In conclusion, the AT27C256R-12PA is a programmable read-only memory chip that offers high storage capacity, fast access times, and reliable performance. It finds applications in various electronic systems and provides non-volatile data storage. While it has limitations in terms of erase/write cycle endurance and requires an external programming voltage, alternative models are available to suit specific requirements.