AT28C64B-15SI

Product Overview

Category

AT28C64B-15SI 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

• Non-volatile: The stored data remains even when power is removed.
• Electrically erasable: The memory can be erased and reprogrammed electronically.
• High storage capacity: The AT28C64B-15SI has a capacity of 64 kilobits (8 kilobytes).
• Fast access time: The chip operates at a speed of 150 nanoseconds.

Package

The AT28C64B-15SI is available in a standard 28-pin plastic dual in-line package (PDIP).

Essence

This EEPROM chip allows for reliable and flexible data storage in electronic systems. It offers non-volatile memory that can be easily programmed and erased.

Packaging/Quantity

The AT28C64B-15SI is typically packaged in tubes or trays, with quantities varying based on customer requirements.

Specifications

• Memory Capacity: 64 kilobits (8 kilobytes)
• Access Time: 150 nanoseconds
• Supply Voltage: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Data Retention: 10 years

Pin Configuration

The AT28C64B-15SI has a total of 28 pins, which are assigned specific functions. The pin configuration is as follows:

1. A14
2. A12
3. A7
4. A6
5. A5
6. A4
7. A3
8. A2
9. A1
10. A0
11. /OE (Output Enable)
12. /WE (Write Enable)
13. /CE (Chip Enable)
14. NC (No Connection)
15. DQ0
16. DQ1
17. DQ2
18. DQ3
19. DQ4
20. DQ5
21. DQ6
22. DQ7
23. VCC (Power Supply)
24. GND (Ground)
25. /BYTE (Byte/Word Organization)
26. /WP (Write Protect)
27. /ACC (Access Time Control)
28. NC (No Connection)

Functional Features

• Byte/Word Organization: The AT28C64B-15SI can be configured to operate in either byte or word mode, providing flexibility in data access.
• Write Protection: The /WP pin allows for write protection, preventing accidental modification of stored data.
• Access Time Control: The /ACC pin enables control over the access time, allowing for optimization based on system requirements.

Advantages and Disadvantages

Advantages

• Non-volatile memory ensures data retention even during power loss.
• Electrically erasable and reprogrammable, providing flexibility in data storage.
• High storage capacity suitable for various applications.
• Fast access time allows for efficient data retrieval.

Disadvantages

• Limited endurance: EEPROMs have a limited number of erase/write cycles before failure.
• Relatively higher cost compared to other types of memory.

Working Principles

The AT28C64B-15SI 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 storing the desired data. Erasing is achieved by removing the charge from the floating gate using an electrical pulse. The stored data can be read by applying appropriate voltage levels to the memory cells.

Detailed Application Field Plans

The AT28C64B-15SI finds applications in various fields, including: 1. Microcontrollers: Used for program storage and data retention. 2. Computers: Employed in BIOS chips and firmware storage. 3. Consumer Electronics: Utilized in devices such as gaming consoles, set-top boxes, and smart appliances for non-volatile data storage.

Detailed and Complete Alternative Models

1. AT28C64B-15PU: Similar to AT28C64B-15SI but packaged in a plastic leaded chip carrier (PLCC).
2. AT28C64B-15JU: Similar to AT28C64B-15SI but packaged in a ceramic leaded chip carrier (CLCC).
3. AT28C64B-15TI: Similar to AT28C64B-15SI but operates at an extended temperature range (-40°C to +125°C).

These alternative models offer similar functionality with slight variations in package type or operating temperature range.

In conclusion, the AT28C64B-15SI is a