AT27C256R-70JI

Product Overview

Category: Integrated Circuit (IC)

Use: The AT27C256R-70JI is a high-performance, low-power, 256K (32K x 8) Electrically Erasable Programmable Read-Only Memory (EEPROM) IC. It is designed to store and retrieve data in various electronic systems.

Characteristics: - High performance with fast access time - Low power consumption - Non-volatile memory - Easy to program and erase - Durable and reliable

Package: The AT27C256R-70JI comes in a 28-pin Plastic Dual In-Line Package (PDIP), which provides easy integration into circuit boards.

Essence: This IC is an essential component for storing critical data in electronic devices, ensuring data integrity even when the power is turned off.

Packaging/Quantity: The AT27C256R-70JI is typically packaged in tubes or trays, with a quantity of 25 units per tube/tray.

Specifications

• Operating Voltage: 4.5V to 5.5V
• Access Time: 70ns
• Standby Current: 100μA (max)
• Programming Time: 10ms (typical)
• Data Retention: 20 years (minimum)
• Endurance: 10,000 write/erase cycles

Pin Configuration

The AT27C256R-70JI has a total of 28 pins, each serving a specific function. Here is the detailed pin configuration:

1. A0 - Address Input
2. A1 - Address Input
3. A2 - Address Input
4. A3 - Address Input
5. A4 - Address Input
6. A5 - Address Input
7. A6 - Address Input
8. A7 - Address Input
9. A8 - Address Input
10. A9 - Address Input
11. A10 - Address Input
12. A11 - Address Input
13. A12 - Address Input
14. A13 - Address Input
15. A14 - Address Input
16. A15 - Address Input
17. /OE - Output Enable
18. /CE - Chip Enable
19. /WE - Write Enable
20. VSS - Ground
21. D0 - Data Input/Output
22. D1 - Data Input/Output
23. D2 - Data Input/Output
24. D3 - Data Input/Output
25. D4 - Data Input/Output
26. D5 - Data Input/Output
27. D6 - Data Input/Output
28. D7 - Data Input/Output

Functional Features

• High-speed access: The AT27C256R-70JI provides fast access times, allowing for efficient data retrieval.
• Low power consumption: This IC is designed to minimize power usage, making it suitable for battery-powered devices.
• Easy programming and erasing: The AT27C256R-70JI supports simple programming and erasing operations, enabling easy modification of stored data.
• Non-volatile memory: The data stored in this EEPROM IC remains intact even when the power is turned off, ensuring data integrity.

Advantages and Disadvantages

Advantages: - Fast access time enables quick data retrieval. - Low power consumption prolongs battery life. - Easy programming and erasing facilitate data modification. - Non-volatile memory ensures data integrity.

Disadvantages: - Limited storage capacity (256K). - Relatively slower programming time compared to some newer EEPROM technologies.

Working Principles

The AT27C256R-70JI utilizes a combination of electronic circuits and memory cells to store and retrieve data. It employs a floating-gate transistor structure that allows for electrical erasure and programming of data.

During operation, the IC receives address inputs to select the desired memory location. The chip enable (/CE) and output enable (/OE) signals control the read and write operations. When data is written, the write enable (/WE) signal enables the programming process.

Detailed Application Field Plans

The AT27C256R-70JI finds applications in various electronic systems, including but not limited to: 1. Microcontrollers 2. Embedded systems 3. Industrial automation 4. Automotive electronics 5. Communication devices 6. Consumer electronics

Its ability to store critical data reliably makes it suitable for applications where non-volatile memory is required.

Detailed and Complete Alternative Models

1. AT28C256-15PU: Similar to the AT27C256R-70JI, this IC offers a 256K capacity with a faster access time of 15ns.
2. AT29C256-12PC: This alternative model provides a 256K capacity with a slightly slower access time