AT27C256R-15PI

Product Overview

Category

AT27C256R-15PI 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 finds applications in various electronic devices where non-volatile memory is required.

Characteristics

• Non-volatile: The stored data remains intact even when power is turned off.
• High storage capacity: The AT27C256R-15PI has a capacity of 256 kilobits, allowing it to store a significant amount of data.
• Fast access time: With a maximum access time of 150 nanoseconds, this chip provides quick retrieval of stored information.
• Low power consumption: The AT27C256R-15PI operates efficiently with low power requirements.
• Durable: This PROM chip is designed to withstand harsh environmental conditions and has a long lifespan.

Package

The AT27C256R-15PI comes in a standard dual in-line package (DIP), which consists of 28 pins arranged in two parallel rows.

Essence

The essence of the AT27C256R-15PI lies in its ability to provide non-volatile storage of data, making it suitable for applications where permanent data retention is crucial.

Packaging/Quantity

This product is typically packaged in anti-static tubes or trays to prevent damage during transportation and storage. The quantity per package varies depending on the supplier but is commonly available in multiples of 25 units.

Specifications

• Memory Capacity: 256 kilobits (32 kilobytes)
• Access Time: Maximum 150 nanoseconds
• Supply Voltage: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Data Retention: Minimum 10 years
• Package Type: DIP-28

Detailed Pin Configuration

The AT27C256R-15PI has a total of 28 pins, each serving a specific purpose. The pin configuration is as follows:

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. NC - No Connection
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. VCC - Power Supply
23. GND - Ground
24. A8 - Address Input
25. A9 - Address Input
26. A11 - Address Input
27. A10 - Address Input
28. /WE - Write Enable

Functional Features

The AT27C256R-15PI offers the following functional features:

• Non-volatile storage: The chip retains data even when power is disconnected.
• High-speed access: With a maximum access time of 150 nanoseconds, it provides quick retrieval of stored information.
• Easy integration: The chip can be easily integrated into existing electronic systems due to its standard pin configuration and package.

Advantages and Disadvantages

Advantages

• Non-volatile memory ensures data retention even during power loss.
• High storage capacity allows for the storage of a significant amount of data.
• Fast access time enables quick retrieval of information.
• Low power consumption results in efficient operation.
• Durable design ensures reliability in various environmental conditions.

Disadvantages

• Data cannot be modified or erased once programmed, limiting its flexibility compared to other types of memory.
• Limited write endurance: The chip has a finite number of write cycles before it may become unreliable.

Working Principles

The AT27C256R-15PI operates based on the principle of electrical charge trapping. During programming, electrical charges are trapped in specific memory cells, representing the stored data. These charges remain trapped even when power is removed, allowing for non-volatile storage.

Detailed Application Field Plans

The AT27C256R-15PI finds applications in various fields where permanent data storage is required. Some common application areas include:

1. Embedded Systems: Used for storing firmware and configuration data in microcontrollers and other embedded devices.
2. Automotive Electronics: Employed for storing critical data such as calibration tables, sensor data, and code in automotive control