AT28HC64BF-70JU

Product Overview

Category

AT28HC64BF-70JU belongs to the category of high-speed, low-power 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

• High-speed operation: The AT28HC64BF-70JU offers fast read and write access times, making it suitable for applications requiring quick data retrieval.
• Low power consumption: This EEPROM chip is designed to operate efficiently with minimal power consumption, extending battery life in portable devices.
• Non-volatile memory: The stored data remains intact even when the power supply is disconnected, ensuring reliable and persistent data storage.
• High endurance: The AT28HC64BF-70JU can withstand a large number of erase/write cycles, making it durable for long-term use.
• Wide operating voltage range: It can operate within a voltage range of 2.7V to 5.5V, providing flexibility in different electronic systems.

Package and Quantity

The AT28HC64BF-70JU is available in a standard 32-pin PLCC (Plastic Leaded Chip Carrier) package. It is typically sold in reels or trays containing multiple units.

Specifications

• Capacity: 64 kilobits (8 kilobytes)
• Organization: 8,192 words x 8 bits
• Operating Voltage Range: 2.7V to 5.5V
• Access Time: 70 nanoseconds
• Data Retention: 10 years
• Endurance: 100,000 erase/write cycles
• Package Type: 32-pin PLCC

Detailed Pin Configuration

The AT28HC64BF-70JU 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. A8: Address Input
11. A9: Address Input
12. A10: Address Input
13. A11: Address Input
14. /OE: Output Enable
15. /WE: Write Enable
16. I/O0: Data Input/Output
17. I/O1: Data Input/Output
18. I/O2: Data Input/Output
19. I/O3: Data Input/Output
20. I/O4: Data Input/Output
21. I/O5: Data Input/Output
22. I/O6: Data Input/Output
23. I/O7: Data Input/Output
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

• Random access: The AT28HC64BF-70JU allows for direct read and write operations to any memory location, enabling efficient data manipulation.
• Hardware and software protection: It provides mechanisms to protect critical data from accidental modification or unauthorized access.
• Page write mode: This feature allows multiple bytes of data to be programmed simultaneously, enhancing programming efficiency.
• Software-controlled write timing: The chip supports various programming algorithms, allowing flexibility in write operations.
• Automatic sleep mode: When not in use, the AT28HC64BF-70JU enters a low-power sleep mode to conserve energy.

Advantages and Disadvantages

Advantages

• High-speed operation enables quick data access.
• Low power consumption prolongs battery life in portable devices.
• Non-volatile memory ensures data retention even during power loss.
• Wide operating voltage range provides compatibility with different systems.
• High endurance allows for long-term usage.

Disadvantages

• Limited storage capacity compared to other memory technologies.
• Relatively higher cost per unit compared to some alternative memory options.
• Limited availability of package options may restrict integration in certain designs.

Working Principles

The AT28HC64BF-70JU utilizes EEPROM technology, which combines the advantages of both EPROM (Erasable Programmable Read-Only Memory) and EEPROM (Electrically Erasable Programmable Read-Only Memory). It stores data using floating-gate transistors that can be electrically programmed and erased.

During programming, an electrical charge is applied to the floating gate, trapping electrons and altering the transistor's