AT27C256R-70JC

Product Overview

Category

AT27C256R-70JC belongs to the category of programmable read-only memory (PROM) chips.

Use

This product is commonly used in electronic devices for storing non-volatile data that needs to be retained even when power is turned off. It allows users to write data onto the chip during manufacturing and then read it back later.

Characteristics

• Non-volatile: The stored data remains intact even without power supply.
• Programmable: Data can be written onto the chip during manufacturing.
• Read-only: Once programmed, the data cannot be modified or erased.

Package

AT27C256R-70JC is available in a 32-pin PLCC (Plastic Leaded Chip Carrier) package.

Essence

The essence of AT27C256R-70JC lies in its ability to provide reliable and non-volatile storage for critical data in various electronic applications.

Packaging/Quantity

This product is typically packaged in reels or tubes, with each containing a specific quantity of chips. The exact packaging and quantity may vary depending on the manufacturer.

Specifications

• Operating Voltage: 5V
• Access Time: 70 nanoseconds
• Memory Size: 256 kilobits (32 kilobytes)
• Organization: 32K x 8 bits
• Temperature Range: -40°C to +85°C

Detailed Pin Configuration

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 (+5V Power Supply)
17. /CE (Chip Enable)
18. I/O0
19. I/O1
20. I/O2
21. I/O3
22. I/O4
23. I/O5
24. I/O6
25. I/O7
26. /WE (Write Enable)
27. /PGM (Program)
28. /BYTE (Byte/Word Organization)
29. VSS (Ground)
30. NC (No Connection)
31. A13
32. A15

Functional Features

• High-speed access: The 70 nanosecond access time ensures quick retrieval of data.
• Low power consumption: AT27C256R-70JC operates efficiently with a low power supply.
• Reliable storage: The non-volatile nature of the chip ensures data integrity over extended periods.

Advantages and Disadvantages

Advantages

• Non-volatile memory: Data remains intact even without power supply.
• Easy to program: Allows for convenient data programming during manufacturing.
• Quick access time: Provides fast retrieval of stored information.

Disadvantages

• Limited storage capacity: With a memory size of 256 kilobits, it may not be suitable for applications requiring larger storage capacities.
• Inability to modify or erase data: Once programmed, the data cannot be changed or erased.

Working Principles

AT27C256R-70JC utilizes a combination of electronic circuits and memory cells to store and retrieve data. During programming, electrical signals are applied to specific pins to write data onto the memory cells. When reading data, the chip enables the output pins to provide the stored information.

Detailed Application Field Plans

AT27C256R-70JC finds application in various electronic devices and systems, including but not limited to: - Embedded systems - Automotive electronics - Industrial control systems - Medical equipment - Communication devices

Detailed and Complete Alternative Models

• AT27C256R-45JC
• AT27C256R-55JC
• AT27C256R-90JC
• AT27C256R-120JC

These alternative models offer different access times and temperature ranges, allowing users to choose the most suitable option for their specific requirements.

In conclusion, AT27C256R-70JC is a programmable read-only memory chip that provides reliable non-volatile storage. With its quick access time and ease of programming, it finds application in various electronic systems across different industries. While it has limitations in terms of storage capacity and data modification, alternative models with varying specifications are available to cater to diverse needs.