AT29C257-20JI

Product Overview

Category

AT29C257-20JI belongs to the category of non-volatile memory integrated circuits.

Use

It is primarily used for data storage and retrieval in electronic devices.

Characteristics

• Non-volatile: Retains data even when power is turned off.
• High capacity: The AT29C257-20JI has a capacity of 256 kilobits (32 kilobytes).
• Fast access time: It operates at a speed of 200 nanoseconds.
• Low power consumption: Designed to minimize power usage.
• Reliable: Offers high endurance and data retention capabilities.

Package

The AT29C257-20JI is available in a 28-pin plastic dual in-line package (PDIP).

Essence

This product is an essential component for storing and accessing data in various electronic devices, such as microcontrollers, embedded systems, and consumer electronics.

Packaging/Quantity

The AT29C257-20JI is typically packaged in reels or tubes, with a quantity of 1000 units per reel/tube.

Specifications

• Memory Capacity: 256 kilobits (32 kilobytes)
• Access Time: 200 nanoseconds
• Supply Voltage: 5V
• Operating Temperature Range: -40°C to +85°C
• Package Type: 28-pin PDIP

Detailed Pin Configuration

1. A16
2. A15
3. A12
4. A7
5. A6
6. A5
7. A4
8. A3
9. A2
10. A1
11. A0
12. VCC
13. OE#
14. CE#
15. WE#
16. I/O0
17. I/O1
18. I/O2
19. I/O3
20. I/O4
21. I/O5
22. I/O6
23. I/O7
24. GND
25. NC
26. NC
27. NC
28. NC

Functional Features

• Easy integration: Compatible with standard microcontroller interfaces.
• High-speed operation: Allows for efficient data transfer and processing.
• Low power consumption: Ideal for battery-powered devices.
• Erase and program capability: Supports in-system programming and updates.

Advantages and Disadvantages

Advantages

• Non-volatile memory ensures data retention even during power loss.
• High capacity allows for storing large amounts of data.
• Fast access time enables quick retrieval of information.
• Low power consumption prolongs battery life in portable devices.

Disadvantages

• Limited storage capacity compared to other memory technologies.
• Relatively slower access times compared to volatile memory.
• Requires external programming equipment for initial setup.

Working Principles

The AT29C257-20JI utilizes a technology called electrically erasable programmable read-only memory (EEPROM). It stores data by trapping electrical charges within its memory cells, which can be erased and reprogrammed using specific voltage levels. When the device receives a read command, it retrieves the stored data from the memory cells and outputs it to the requesting device.

Detailed Application Field Plans

The AT29C257-20JI finds applications in various fields, including:

1. Automotive electronics: Used for storing firmware, configuration data, and diagnostic information in automotive control units.
2. Industrial automation: Enables data storage in programmable logic controllers (PLCs) and human-machine interface (HMI) devices.
3. Consumer electronics: Utilized in devices such as digital cameras, printers, and set-top boxes for storing user settings, firmware, and multimedia content.
4. Medical devices: Stores critical patient data, firmware, and configuration settings in medical equipment like patient monitors and diagnostic devices.

Detailed and Complete Alternative Models

1. AT28C256-15PU: Similar capacity and characteristics, but operates at a slower speed of 150 nanoseconds.
2. AT49BV256-20TU: Flash memory alternative with the same capacity and access time, suitable for applications requiring reprogrammability.
3. M27C256B-12F1: EPROM alternative with similar capacity and access time, but requires an external UV light source for erasing.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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