AT28C64B-15JI

Product Overview

Category

AT28C64B-15JI belongs to the category of electrically erasable programmable read-only memory (EEPROM) chips.

Use

This product is commonly used in electronic devices for storing and retrieving data. It provides non-volatile storage, meaning that the data remains even when power is removed.

Characteristics

• Electrically erasable: The AT28C64B-15JI can be erased and reprogrammed electronically, making it convenient for updating or modifying stored data.
• High storage capacity: This chip has a capacity of 64 kilobits, allowing for the storage of a significant amount of data.
• Low power consumption: The AT28C64B-15JI operates on low power, making it suitable for battery-powered devices.
• Fast access time: With a maximum access time of 150 nanoseconds, this chip enables quick retrieval of stored data.

Package

The AT28C64B-15JI comes in a 32-pin plastic J-lead package, which provides mechanical protection and facilitates easy integration into electronic circuits.

Essence

The essence of the AT28C64B-15JI lies in its ability to store and retrieve data reliably and efficiently. Its electrically erasable nature allows for flexibility in data management.

Packaging/Quantity

This product is typically packaged in reels or tubes, with each containing a specific quantity of chips. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Memory Capacity: 64 kilobits (8 kilobytes)
• Operating Voltage: 2.7V - 5.5V
• Access Time: 150 nanoseconds (maximum)
• Erase/Write Cycles: 10,000 minimum
• Data Retention: 10 years minimum
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The AT28C64B-15JI has a total of 32 pins, each serving a specific function. The pin configuration is as follows:

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. VCC - Power Supply
10. OE - Output Enable
11. CE - Chip Enable
12. WE - Write Enable
13. I/O0 - Data Input/Output
14. I/O1 - Data Input/Output
15. I/O2 - Data Input/Output
16. I/O3 - Data Input/Output
17. I/O4 - Data Input/Output
18. I/O5 - Data Input/Output
19. I/O6 - Data Input/Output
20. I/O7 - Data Input/Output
21. NC - No Connection
22. NC - No Connection
23. NC - No Connection
24. GND - Ground
25. NC - No Connection
26. NC - No Connection
27. NC - No Connection
28. NC - No Connection
29. NC - No Connection
30. NC - No Connection
31. NC - No Connection
32. NC - No Connection

Functional Features

The AT28C64B-15JI offers the following functional features:

• Byte-wise Read and Write Operations: It allows for individual byte-level read and write operations, providing flexibility in data manipulation.
• Electronic Erase: The chip can be erased electronically, eliminating the need for physical erasure methods such as UV light exposure.
• Automatic Page Write: This feature enables efficient programming of multiple bytes within a page, reducing the overall programming time.
• Software Data Protection: The AT28C64B-15JI includes software-controlled data protection mechanisms to prevent accidental modification or erasure.

Advantages and Disadvantages

Advantages

• Electrically erasable and reprogrammable, allowing for easy updates and modifications.
• High storage capacity for storing significant amounts of data.
• Low power consumption, making it suitable for battery-powered devices.
• Fast access time for quick retrieval of stored data.
• Software data protection mechanisms ensure data integrity.

Disadvantages

• Limited erase/write cycles (10,000 minimum) compared to other non-volatile memory technologies.
• Relatively higher cost compared to traditional read-only memory (ROM) chips.

Working Principles

The AT28C64B-15JI operates based on the principles of EEPROM technology. It utilizes a floating gate transistor structure to store and retain charge, representing binary data. When data needs to be written or erased, high voltages are applied to specific pins, altering the charge on the floating gate. This allows for