AT27C256R-15RI

Product Overview

Category

AT27C256R-15RI belongs to the category of programmable read-only memory (PROM) chips.

Use

This chip is commonly used for storing non-volatile data that needs to be retained even when power is turned off. It is widely utilized in various electronic devices such as computers, microcontrollers, and consumer electronics.

Characteristics

• Non-volatile: The stored data remains intact even without power supply.
• High storage capacity: The AT27C256R-15RI has a capacity of 256 kilobits (32 kilobytes).
• Fast access time: With a speed rating of 150 nanoseconds, it provides quick data retrieval.
• Reliable: The chip offers high endurance and long-term data retention.

Package

The AT27C256R-15RI is available in a standard dual in-line package (DIP). This package type consists of two parallel rows of pins, which can be easily inserted into a socket on a circuit board.

Essence

The essence of the AT27C256R-15RI lies in its ability to store and retrieve data reliably, making it an essential component in many electronic systems.

Packaging/Quantity

The chip is typically packaged in tubes or trays, with each tube or tray containing a specific quantity of chips. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Capacity: 256 kilobits (32 kilobytes)
• Access Time: 150 nanoseconds
• Supply Voltage: 5V
• Operating Temperature Range: -40°C to +85°C
• Package Type: Dual In-Line Package (DIP)

Detailed Pin Configuration

The AT27C256R-15RI has a total of 28 pins, each serving a specific function. 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 (+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. GND (Ground)
27. NC (No Connection)
28. /WE (Write Enable)

Functional Features

The AT27C256R-15RI offers the following functional features:

• High-speed access: The chip provides fast data retrieval with a low access time of 150 nanoseconds.
• Easy integration: It can be easily integrated into various electronic systems due to its standard pin configuration and package type.
• Non-volatile storage: The stored data remains intact even when power is turned off, ensuring reliable data retention.
• Compatibility: The chip is compatible with a wide range of microcontrollers and electronic devices.

Advantages and Disadvantages

Advantages

• Reliable data retention
• Fast access time
• Easy integration into existing systems
• Wide compatibility with other devices

Disadvantages

• Limited storage capacity compared to modern memory technologies
• Requires external programming equipment for initial data programming

Working Principles

The AT27C256R-15RI operates based on the principle of electrically erasable programmable read-only memory (EEPROM). It uses a grid of transistors to store binary data in the form of electrical charges. The stored data can be accessed by applying appropriate voltage levels to the chip's pins.

Detailed Application Field Plans

The AT27C256R-15RI finds applications in various fields, including:

1. Computer systems: Used for storing BIOS (Basic Input/Output System) firmware and other critical system data.
2. Microcontrollers: Utilized for storing program code and configuration data in embedded systems.
3. Consumer electronics: Integrated into devices such as gaming consoles, set-top boxes, and audio players for storing firmware and user data.

Detailed and Complete Alternative Models

There are several alternative models available that offer similar functionality to the AT27C256R-15RI. Some notable alternatives include:

1. AT28C256: A compatible chip from the same manufacturer, Atmel.
2. 27C256: A widely used equivalent from other manufacturers such as STMicroelectronics and Texas Instruments.
3. AM27C256: An alternative model offered by Advanced Micro Devices (AMD).

These alternative models share similar specifications and pin configurations, making them suitable replacements for the AT27C256R-15RI in various applications.

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