AT28C64E-20PC

Product Overview

Category

AT28C64E-20PC 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-20PC can be erased and reprogrammed electrically, eliminating the need for UV light exposure.
• High storage capacity: It offers a storage capacity of 64 kilobits (8 kilobytes), allowing for ample data storage.
• Low power consumption: This EEPROM chip operates at low power levels, making it suitable for battery-powered devices.
• Fast access time: With a maximum access time of 200 nanoseconds, it provides quick data retrieval.

Package

The AT28C64E-20PC is available in a 28-pin plastic dual in-line package (PDIP), which ensures easy integration into circuit boards.

Essence

The essence of this product lies in its ability to store and retain data even when the power supply is disconnected. It offers reliable and non-volatile memory storage for electronic systems.

Packaging/Quantity

The AT28C64E-20PC is typically packaged in tubes or trays, with each tube or tray containing a specified quantity of chips. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Memory Type: Electrically Erasable Programmable Read-Only Memory (EEPROM)
• Capacity: 64 kilobits (8 kilobytes)
• Access Time: 200 nanoseconds (maximum)
• Supply Voltage: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Package Type: 28-pin Plastic Dual In-Line Package (PDIP)

Detailed Pin Configuration

The AT28C64E-20PC has a total of 28 pins, each serving a specific purpose. The pin configuration is as follows:

1. A14 - Address Input
2. A12 - Address Input
3. A7 - Address Input
4. A6 - Address Input
5. A5 - Address Input
6. A4 - Address Input
7. A3 - Address Input
8. A2 - Address Input
9. A1 - Address Input
10. A0 - Address Input
11. /OE - Output Enable
12. /WE - Write Enable
13. VCC - Power Supply
14. A8 - Address Input
15. A9 - Address Input
16. A11 - Address Input
17. A10 - Address Input
18. DQ0 - Data Input/Output
19. DQ1 - Data Input/Output
20. DQ2 - Data Input/Output
21. DQ3 - Data Input/Output
22. DQ4 - Data Input/Output
23. DQ5 - Data Input/Output
24. DQ6 - Data Input/Output
25. DQ7 - Data Input/Output
26. /CE - Chip Enable
27. NC - No Connection
28. GND - Ground

Functional Features

• Byte-wise Read and Write: The AT28C64E-20PC allows for individual byte-level read and write operations, providing flexibility in data manipulation.
• Hardware Data Protection: This EEPROM chip features a hardware protection mechanism that prevents accidental writes to protected memory areas.
• High Reliability: With a minimum endurance of 100,000 write cycles, the AT28C64E-20PC ensures long-term data retention and reliability.
• Low Power Consumption: The low power requirements of this chip make it suitable for battery-powered devices, extending their operational life.

Advantages and Disadvantages

Advantages

• Electrically erasable and reprogrammable, eliminating the need for UV light exposure.
• High storage capacity allows for ample data storage.
• Low power consumption makes it suitable for battery-powered devices.
• Fast access time ensures quick data retrieval.
• Hardware data protection mechanism prevents accidental writes.

Disadvantages

• Limited storage capacity compared to other memory technologies like flash memory.
• Relatively slower write speeds compared to some modern memory technologies.

Working Principles

The AT28C64E-20PC operates based on the principles of EEPROM technology. It utilizes a grid of floating-gate transistors to store and retain data. When data needs to be written, an electrical charge is applied to the floating gate, altering its threshold voltage. This change in threshold voltage represents the stored data. To read the data, the threshold voltage of the transistor is measured, allowing the retrieval of the stored information.

Detailed Application Field Plans

The AT28C