AT29C257-90JI

Product Overview

Category

AT29C257-90JI belongs to the category of non-volatile memory integrated circuits.

Use

This product is primarily used for storing and retrieving digital information in electronic devices.

Characteristics

• Non-volatile: The stored data remains intact even when power is removed.
• High capacity: The AT29C257-90JI has a storage capacity of 256 kilobits (32 kilobytes).
• Fast access time: It operates at a speed of 90 nanoseconds, allowing for quick data retrieval.
• Low power consumption: The device is designed to minimize power usage, making it suitable for battery-powered applications.

Package

The AT29C257-90JI is available in a 28-pin plastic dual in-line package (PDIP).

Essence

The essence of this product lies in its ability to provide reliable and non-volatile storage for electronic systems.

Packaging/Quantity

The AT29C257-90JI is typically packaged in reels or tubes, with a quantity of 1000 units per package.

Specifications

• Memory Type: Electrically Erasable Programmable Read-Only Memory (EEPROM)
• Organization: 32K x 8 bits
• Supply Voltage: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Data Retention: 10 years
• Endurance: 100,000 write cycles

Detailed Pin Configuration

The AT29C257-90JI has a total of 28 pins, each serving a specific function. Here is a detailed pin configuration:

1. A16: Address Input
2. A15: Address Input
3. A12: Address Input
4. A7: Address Input
5. A6: Address Input
6. A5: Address Input
7. A4: Address Input
8. A3: Address Input
9. A2: Address Input
10. A1: Address Input
11. A0: Address Input
12. VCC: Power Supply
13. OE: Output Enable
14. CE: Chip Enable
15. WE: Write Enable
16. I/O0: Data Input/Output
17. I/O1: Data Input/Output
18. I/O2: Data Input/Output
19. I/O3: Data Input/Output
20. I/O4: Data Input/Output
21. I/O5: Data Input/Output
22. I/O6: Data Input/Output
23. I/O7: Data Input/Output
24. NC: No Connection
25. GND: Ground
26. A8: Address Input
27. A9: Address Input
28. A11: Address Input

Functional Features

The AT29C257-90JI offers the following functional features:

• Byte-wise programmability: Allows individual bytes to be programmed or erased.
• Sector erase capability: Enables erasing of larger memory blocks for efficient data management.
• Hardware and software protection: Provides mechanisms to protect critical data from accidental modification.
• Automatic write timing: Simplifies the programming process by automatically managing the required timing parameters.

Advantages and Disadvantages

Advantages

• Non-volatile storage ensures data integrity even during power loss.
• High storage capacity suitable for a wide range of applications.
• Fast access time allows for quick data retrieval.
• Low power consumption extends battery life in portable devices.

Disadvantages

• Limited endurance compared to other memory technologies.
• Relatively higher cost per bit compared to some alternative memory options.
• Requires specific programming equipment for initial setup and updates.

Working Principles

The AT29C257-90JI utilizes EEPROM technology to store and retrieve digital information. It employs a combination of electrically controlled floating gate transistors and memory cells to achieve non-volatile data storage. The device can be programmed or erased using specific voltage levels applied to the control pins, allowing for flexible data manipulation.

Detailed Application Field Plans

The AT29C257-90JI finds applications in various electronic systems, including but not limited to:

1. Embedded systems: Used for firmware storage in microcontrollers and other embedded devices.
2. Communication equipment: Provides non-volatile memory for storing configuration settings and firmware updates.
3. Automotive electronics: Utilized in automotive control units for storing calibration data and software updates.
4. Industrial automation: Enables reliable storage of program code and data in industrial control systems.
5. Consumer electronics: Used in devices such as set-top boxes, gaming consoles, and smart appliances for data storage.

Detailed and Complete Alternative Models

1. AT28C256: Similar capacity and functionality, available in different package options.
2. AT49BV256: Flash memory alternative with higher endurance and faster write