AT28HC64B-90TC

Product Overview

Category

AT28HC64B-90TC 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 AT28HC64B-90TC offers fast read and write operations, making it suitable for applications requiring quick access to stored data.
• Low power consumption: This EEPROM chip is designed to minimize power consumption, making it ideal for battery-powered devices.
• Non-volatile memory: The stored data remains intact even when the power supply is disconnected.
• High endurance: The AT28HC64B-90TC can withstand a large number of read and write cycles, ensuring long-term reliability.
• Wide operating voltage range: It operates within a voltage range of 2.7V to 5.5V, providing flexibility in different electronic systems.

Package and Quantity

The AT28HC64B-90TC is available in a Thin Small Outline Package (TSOP) with 32 pins. It is typically sold in reels containing multiple units.

Specifications

• Capacity: 64 kilobits (8 kilobytes)
• Organization: 8,192 words x 8 bits
• Access Time: 90 nanoseconds
• Operating Voltage Range: 2.7V to 5.5V
• Standby Current: 10 microamps (max)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The AT28HC64B-90TC has a total of 32 pins, which are assigned specific functions. The pin configuration is as follows:

1. A0
2. A1
3. A2
4. A3
5. A4
6. A5
7. A6
8. A7
9. VCC
10. CE (Chip Enable)
11. OE (Output Enable)
12. WE (Write Enable)
13. I/O0
14. I/O1
15. I/O2
16. I/O3
17. I/O4
18. I/O5
19. I/O6
20. I/O7
21. NC (No Connection)
22. GND
23. NC
24. NC
25. NC
26. NC
27. NC
28. NC
29. NC
30. NC
31. NC
32. NC

Functional Features

• Random access: The AT28HC64B-90TC allows random access to any memory location, enabling efficient data retrieval.
• Byte-wise programming: It supports byte-level programming, allowing selective modification of specific data bytes without affecting the rest of the memory.
• Hardware and software protection: This EEPROM chip provides various protection mechanisms to prevent unauthorized access or accidental modifications to stored data.
• High reliability: With built-in error detection and correction techniques, the AT28HC64B-90TC ensures data integrity and reliable operation.

Advantages and Disadvantages

Advantages

• Fast read and write operations
• Low power consumption
• Non-volatile memory
• High endurance
• Wide operating voltage range

Disadvantages

• Limited storage capacity compared to other memory technologies
• Relatively higher cost per kilobyte compared to larger capacity EEPROMs

Working Principles

The AT28HC64B-90TC utilizes a combination of electronic circuits and floating gate transistors to store and retrieve data. When writing data, an electric charge is applied to the floating gate, altering its electrical characteristics. This charge can be removed during the erasing process, allowing the memory cell to be reprogrammed. During read operations, the stored charge is measured to determine the data value.

Application Field Plans

The AT28HC64B-90TC finds applications in various electronic systems, including but not limited to: - Microcontrollers - Computers and servers - Automotive electronics - Industrial control systems - Consumer electronics (e.g., smartphones, tablets, gaming consoles)

Alternative Models

Several alternative models with similar specifications and functionality are available in the market. Some notable alternatives to the AT28HC64B-90TC include: - AT28C64B-15PU - 24LC64-I/P - M93C66-WMN6TP

These alternatives offer comparable performance and compatibility, providing users with flexibility in choosing the most suitable EEPROM chip for their specific requirements.

In conclusion, the AT28HC64B-90TC is a high-speed, low-power EEPROM chip that offers reliable non-volatile data storage. With its fast operation, low power consumption, and wide operating voltage range, it is well