AT29C257-90JC

Product Overview

Category: Integrated Circuit (IC)

Use: The AT29C257-90JC is a high-performance electrically erasable and programmable read-only memory (EEPROM) IC. It is commonly used in various electronic devices for non-volatile data storage.

Characteristics: - High-speed operation - Low power consumption - Wide voltage range - Large storage capacity - Reliable data retention

Package: The AT29C257-90JC is available in a 32-pin PLCC (Plastic Leaded Chip Carrier) package, which provides mechanical protection and facilitates easy integration into circuit boards.

Essence: This IC is designed to store and retrieve digital information reliably, even when the power supply is disconnected. It offers a convenient solution for applications that require non-volatile memory.

Packaging/Quantity: The AT29C257-90JC is typically sold in reels or tubes containing multiple units, making it suitable for mass production and assembly processes.

Specifications

• Memory Capacity: 256 kilobits (32 kilobytes)
• Access Time: 90 nanoseconds
• Supply Voltage: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Erase/Program Cycles: 10,000 minimum

Detailed Pin Configuration

The AT29C257-90JC features a total of 32 pins, each serving a specific purpose. Here is a 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. VCC - Power Supply
21. DQ0 - Data Input/Output
22. DQ1 - Data Input/Output
23. DQ2 - Data Input/Output
24. DQ3 - Data Input/Output
25. DQ4 - Data Input/Output
26. DQ5 - Data Input/Output
27. DQ6 - Data Input/Output
28. DQ7 - Data Input/Output
29. /RP - Ready/Busy Output
30. /PGM - Program Mode
31. /VPP - Programming Voltage
32. GND - Ground

Functional Features

The AT29C257-90JC offers several functional features that enhance its usability and performance:

• High-speed operation allows for quick data access and retrieval.
• Low power consumption ensures efficient use of energy resources.
• Wide voltage range compatibility enables integration into various electronic systems.
• Large storage capacity provides ample space for storing critical data.
• Reliable data retention ensures the integrity of stored information over extended periods.

Advantages and Disadvantages

Advantages: - Fast access time enhances overall system performance. - Low power consumption prolongs battery life in portable devices. - Wide voltage range compatibility increases versatility. - Large storage capacity accommodates extensive data requirements. - Reliable data retention ensures data integrity.

Disadvantages: - Limited erase/program cycles may restrict certain applications. - The PLCC package may require additional space on the circuit board.

Working Principles

The AT29C257-90JC operates based on the principles of electrically erasable and programmable read-only memory (EEPROM). It utilizes a combination of electrical signals and charge storage mechanisms to store and retrieve digital information. The IC employs a series of address inputs, control signals, and data input/output lines to facilitate read and write operations.

Detailed Application Field Plans

The AT29C257-90JC finds applications in various fields where non-volatile memory is required. Some detailed application field plans include:

1. Consumer Electronics: Used in devices such as smartphones, tablets, and digital cameras for storing user data, firmware, and system configurations.
2. Automotive Systems: Employed in automotive electronics for storing critical data like engine parameters, sensor calibration, and vehicle settings.
3. Industrial Control Systems: Utilized in industrial automation systems for storing program code, configuration data, and historical logs.
4. Medical Devices: Integrated into medical equipment for storing patient data, device settings, and firmware updates.
5. Communication Systems: Used in networking devices, routers, and switches for storing firmware,