AT28C64E-20JC

Product Overview

Category

AT28C64E-20JC belongs to the category of electrically erasable programmable read-only memory (EEPROM) chips.

Use

This product is primarily used for non-volatile data storage in various electronic devices such as microcontrollers, computers, and consumer electronics.

Characteristics

• Electrically erasable: The AT28C64E-20JC can be erased and reprogrammed electronically, making it convenient for updating stored data.
• Non-volatile: The stored data remains intact even when power is removed.
• High capacity: This chip has a storage capacity of 64 kilobits (8 kilobytes), allowing for ample data storage.
• Low power consumption: The AT28C64E-20JC operates on low power, making it suitable for battery-powered devices.
• Fast access time: With a maximum access time of 200 nanoseconds, this chip ensures quick retrieval of stored data.

Package

The AT28C64E-20JC is available in a 32-pin PLCC (Plastic Leaded Chip Carrier) package.

Essence

The essence of the AT28C64E-20JC lies in its ability to provide reliable and flexible non-volatile data storage in electronic devices.

Packaging/Quantity

This product is typically packaged in reels or tubes, with each containing a specific quantity of AT28C64E-20JC chips. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Memory Capacity: 64 kilobits (8 kilobytes)
• Supply Voltage: 2.7V to 5.5V
• Access Time: 200 nanoseconds (maximum)
• Operating Temperature Range: -40°C to +85°C
• Data Retention: 10 years (minimum)

Detailed Pin Configuration

The AT28C64E-20JC chip has a total of 32 pins. The pin configuration is as follows:

1. A14
2. A12
3. A7
4. A6
5. A5
6. A4
7. A3
8. A2
9. A1
10. A0
11. /OE (Output Enable)
12. /WE (Write Enable)
13. VCC (Power Supply)
14. NC (No Connection)
15. I/O0
16. I/O1
17. I/O2
18. I/O3
19. I/O4
20. I/O5
21. I/O6
22. I/O7
23. CE (Chip Enable)
24. A8
25. A9
26. A11
27. A10
28. /BYTE (Byte/Word Organization)
29. VSS (Ground)
30. NC (No Connection)
31. /WP (Write Protect)
32. NC (No Connection)

Functional Features

• Byte/Word Organization: The AT28C64E-20JC supports both byte and word organization, providing flexibility in data storage.
• Output Enable (/OE) Control: The output enable pin allows for easy control of data output from the chip.
• Write Enable (/WE) Control: The write enable pin enables or disables the writing of data to the chip.
• Chip Enable (CE): The chip enable pin activates or deactivates the chip for read or write operations.
• Write Protect (/WP): The write protect pin provides an additional layer of security by preventing accidental writes to the chip.

Advantages and Disadvantages

Advantages

• Electrically erasable and reprogrammable, allowing for easy updates to stored data.
• Non-volatile memory ensures data retention even during power loss.
• High storage capacity for ample data storage requirements.
• Low power consumption, making it suitable for battery-powered devices.
• Fast access time ensures quick retrieval of stored data.

Disadvantages

• Limited endurance: EEPROM chips have a limited number of erase/write cycles before they may become unreliable.
• Relatively higher cost compared to other types of memory.

Working Principles

The AT28C64E-20JC operates based on the principles of electrically erasable programmable read-only memory. It utilizes a floating gate transistor structure that allows for the storage and retrieval of digital data. The stored data can be erased and reprogrammed by applying specific electrical signals to the chip's control pins.

Detailed Application Field Plans

The AT28C64E-20JC finds applications in various fields, including: 1. Microcontrollers: Used for storing firmware, configuration data, and non-volatile variables. 2. Computers: Employed in BIOS (Basic Input/Output System) chips for storing system settings and boot code. 3. Consumer Electronics: Utilized in devices such as smart TVs,