AT28C64E-25PC

Product Overview

Category

AT28C64E-25PC belongs to the category of electrically erasable programmable read-only memory (EEPROM) chips.

Use

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

Characteristics

• Electrically erasable: The AT28C64E-25PC can be erased and reprogrammed electronically, making it convenient for updating data.
• Non-volatile: The stored data remains even when power is removed.
• High capacity: This chip has a capacity of 64 kilobits, allowing for substantial data storage.
• Low power consumption: The AT28C64E-25PC operates efficiently with low power requirements.
• Fast access time: With a speed rating of 25 nanoseconds, this chip provides quick data retrieval.

Package

The AT28C64E-25PC is available in a 28-pin plastic dual in-line package (PDIP), which ensures easy integration into circuit boards.

Essence

This EEPROM chip serves as a reliable and efficient means of storing and retrieving data in electronic systems.

Packaging/Quantity

The AT28C64E-25PC is typically packaged in tubes or trays, with each containing a specified quantity of chips. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Capacity: 64 kilobits (8 kilobytes)
• Organization: 8,192 words × 8 bits
• Supply voltage: 4.5V to 5.5V
• Access time: 25 nanoseconds
• Operating temperature range: -40°C to +85°C
• Data retention: 10 years minimum

Detailed Pin Configuration

The AT28C64E-25PC features a 28-pin configuration. The pinout diagram and description of each pin are 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. VCC: Power supply (+5V)
10. A1: Address input
11. A0: Address input
12. CE: Chip enable (active low)
13. OE: Output enable (active low)
14. WE: Write enable (active low)
15. I/O0: Data input/output
16. I/O1: Data input/output
17. I/O2: Data input/output
18. I/O3: Data input/output
19. I/O4: Data input/output
20. I/O5: Data input/output
21. I/O6: Data input/output
22. I/O7: Data input/output
23. NC: No connection
24. GND: Ground
25. A8: Address input
26. A9: Address input
27. A11: Address input
28. A13: Address input

Functional Features

• Byte-wise programmable: The AT28C64E-25PC allows individual bytes to be programmed or erased, providing flexibility in data manipulation.
• High-speed operation: With a fast access time of 25 nanoseconds, this chip enables efficient data retrieval.
• Low power consumption: The AT28C64E-25PC operates with low power requirements, making it suitable for battery-powered devices.
• Extended temperature range: This chip can withstand a wide operating temperature range from -40°C to +85°C, ensuring reliability in various environments.

Advantages and Disadvantages

Advantages

• Electrically erasable and reprogrammable
• Non-volatile data storage
• High capacity for data storage
• Low power consumption
• Fast access time

Disadvantages

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

Working Principles

The AT28C64E-25PC utilizes a floating-gate transistor structure to store data. When programming, an electrical charge is applied to the floating gate, altering its threshold voltage and allowing data to be stored. Erasing is achieved by removing the charge from the floating gate. The chip's control pins (CE, OE, WE) enable the desired operations.

Detailed Application Field Plans

The AT28C64E-25PC finds applications in various fields, including: 1. Microcontrollers: Used for program storage in microcontroller-based systems. 2. Computers: Employed for storing BIOS (Basic Input/Output System) firmware or configuration data. 3. Consumer electronics: Utilized in devices such as smart TVs, set-top