AT28C64E-20PI

Product Overview

Category

AT28C64E-20PI belongs to the category of electrically erasable programmable read-only memory (EEPROM) chips.

Use

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

Characteristics

• Non-volatile: The stored data remains intact even when power is removed.
• Electrically erasable: Data can be erased and reprogrammed electronically.
• High storage capacity: The AT28C64E-20PI has a storage capacity of 64 kilobits (8 kilobytes).
• Low power consumption: This chip operates on low power, making it suitable for battery-powered devices.
• Fast access time: It offers a fast access time of 200 nanoseconds.

Package and Quantity

The AT28C64E-20PI comes in a 28-pin plastic dual in-line package (PDIP). It is typically sold in quantities of one or more.

Specifications

• Memory Capacity: 64 kilobits (8 kilobytes)
• Operating Voltage: 5V
• Access Time: 200 ns
• Interface: Parallel
• Erase/Write Cycles: 10,000 minimum
• Data Retention: 10 years minimum
• Package Type: 28-pin PDIP

Pin Configuration

The AT28C64E-20PI has the following pin configuration:

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 (+5V)
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

Functional Features

• High-speed operation: The AT28C64E-20PI offers fast read and write operations, allowing for efficient data access.
• Easy integration: It can be easily integrated into existing electronic systems due to its standard parallel interface.
• Reliable data storage: The EEPROM technology ensures reliable and long-term data storage without the need for a continuous power supply.
• Flexible programming: The chip supports both byte-level and page-level programming, providing flexibility in data storage.

Advantages and Disadvantages

Advantages

• Non-volatile memory: Data remains intact even during power loss or device shutdown.
• Electrically erasable: Allows for easy reprogramming of data without the need for physical removal.
• High storage capacity: Offers ample space for storing digital information.
• Low power consumption: Ideal for battery-powered devices, as it consumes minimal power during operation.
• Fast access time: Enables quick retrieval and modification of stored data.

Disadvantages

• Limited erase/write cycles: The chip has a finite number of erase/write cycles before it may become unreliable.
• Relatively small storage capacity: Compared to other memory technologies, the AT28C64E-20PI has a relatively modest storage capacity.

Working Principles

The AT28C64E-20PI utilizes EEPROM technology, which allows for non-volatile storage of digital data. It consists of a grid of memory cells that can be individually programmed or erased using electrical signals. When data is written to the chip, it is stored in the memory cells by altering the charge on specific transistors. The stored data can be read back by applying appropriate voltage levels to the address and control pins.

Application Field Plans

The AT28C64E-20PI finds applications in various fields, including:

1. Microcontrollers: Used for storing firmware, configuration data, and program code.
2. Computers: Employed in BIOS chips and other non-volatile memory requirements.
3. Consumer Electronics: Utilized in devices such as set-top boxes, gaming consoles, and smart appliances for data storage.

Alternative Models

Several alternative models with similar functionality are available in the market. Some notable alternatives to the AT28C64E-20