AT27C256R-70RI

Product Overview

Category

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

Use

This chip is commonly used for storing fixed data or program code that needs to be permanently stored and cannot be modified.

Characteristics

• Non-volatile: The data stored in AT27C256R-70RI remains intact even when power is turned off.
• High storage capacity: This chip has a storage capacity of 256 kilobits (32 kilobytes).
• Fast access time: With an access time of 70 nanoseconds, it provides quick retrieval of stored data.
• Low power consumption: AT27C256R-70RI operates on low power, making it suitable for battery-powered devices.

Package

AT27C256R-70RI is available in a 28-pin dual in-line package (DIP), which is a common packaging format for integrated circuits.

Essence

The essence of AT27C256R-70RI lies in its ability to store and retain data without the need for continuous power supply. It offers a reliable and permanent solution for storing critical information.

Packaging/Quantity

AT27C256R-70RI is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier.

Specifications

• Storage Capacity: 256 kilobits (32 kilobytes)
• Access Time: 70 nanoseconds
• Operating Voltage: 5 volts
• Package Type: 28-pin DIP

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. /OE - Output Enable
12. /CE - Chip Enable
13. VCC - Power Supply
14. D7 - Data Input/Output
15. D6 - Data Input/Output
16. D5 - Data Input/Output
17. D4 - Data Input/Output
18. D3 - Data Input/Output
19. D2 - Data Input/Output
20. D1 - Data Input/Output
21. D0 - Data Input/Output
22. /WE - Write Enable
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

• Non-volatile storage: AT27C256R-70RI retains data even when power is turned off.
• High-speed access: With a fast access time of 70 nanoseconds, it allows for quick retrieval of stored information.
• Easy integration: The chip can be easily integrated into various electronic systems due to its standard pin configuration and package.

Advantages and Disadvantages

Advantages

• Reliable data storage: The non-volatile nature of AT27C256R-70RI ensures that stored data remains intact over long periods.
• Fast access time: The chip's quick access time enables efficient data retrieval.
• Low power consumption: AT27C256R-70RI operates on low power, making it suitable for energy-efficient applications.

Disadvantages

• Lack of reprogrammability: Once programmed, the data stored in AT27C256R-70RI cannot be modified or erased, limiting its flexibility compared to other memory technologies.
• Limited storage capacity: With a capacity of 256 kilobits, this chip may not be suitable for applications requiring larger memory sizes.

Working Principles

AT27C256R-70RI utilizes a technology known as electrically erasable programmable read-only memory (EEPROM). It stores data using a grid of transistors that can be electrically programmed to represent binary information. Once programmed, the stored data remains intact until explicitly erased.

Detailed Application Field Plans

AT27C256R-70RI finds applications in various fields, including: 1. Embedded systems: It is commonly used in microcontroller-based systems to store firmware or boot code. 2. Automotive electronics: The chip is utilized in automotive applications for storing critical data such as calibration parameters or configuration settings. 3. Industrial control systems: AT27C256R-70RI is employed in industrial control systems to store program code or configuration data.

Detailed and Complete Alternative Models

1. AT28C256-15PU: This alternative model offers similar specifications and functionality to AT27C256R-70RI but operates at a slower access time of