AT28C64-12SI

Product Overview

Category

AT28C64-12SI belongs to the category of electrically erasable programmable read-only memory (EEPROM) chips.

Use

This product is commonly used in electronic devices for storing and retrieving data. It provides non-volatile storage, meaning that the data remains even when power is removed.

Characteristics

• Electrically erasable: The AT28C64-12SI can be erased and reprogrammed electronically, making it convenient for updating or modifying stored data.
• High storage capacity: This chip has a storage capacity of 64 kilobits, allowing it to store a significant amount of information.
• Low power consumption: The AT28C64-12SI is designed to operate with low power consumption, making it suitable for battery-powered devices.
• Fast access time: With a speed rating of 120 nanoseconds, this chip allows for quick retrieval of stored data.

Package

The AT28C64-12SI comes in a standard 28-pin plastic dual in-line package (PDIP), which is a common packaging format for integrated circuits.

Essence

The essence of the AT28C64-12SI lies in its ability to provide reliable and non-volatile storage for electronic devices. It offers a high storage capacity, fast access times, and low power consumption.

Packaging/Quantity

This product is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier or manufacturer.

Specifications

• Manufacturer: Atmel Corporation
• Part Number: AT28C64-12SI
• Memory Type: EEPROM
• Memory Size: 64 kilobits
• Access Time: 120 nanoseconds
• Supply Voltage: 5 volts
• Operating Temperature Range: -40°C to +85°C
• Package Type: 28-pin PDIP

Detailed Pin Configuration

The AT28C64-12SI has a total of 28 pins. 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. VSS (Ground)
14. NC (No Connection)
15. DQ0 (Data Input/Output 0)
16. DQ1 (Data Input/Output 1)
17. DQ2 (Data Input/Output 2)
18. DQ3 (Data Input/Output 3)
19. DQ4 (Data Input/Output 4)
20. DQ5 (Data Input/Output 5)
21. DQ6 (Data Input/Output 6)
22. DQ7 (Data Input/Output 7)
23. VCC (Supply Voltage)
24. A8
25. A9
26. A11
27. A10
28. /CE (Chip Enable)

Functional Features

The AT28C64-12SI offers the following functional features:

• Byte-wise programmable: It allows individual bytes to be programmed or erased, providing flexibility in data storage and modification.
• High endurance: This chip can withstand a large number of program/erase cycles, ensuring long-term reliability.
• Data retention: The stored data remains intact for an extended period, even without power supply.
• Hardware and software protection: The AT28C64-12SI provides mechanisms to protect the stored data from accidental modifications.

Advantages and Disadvantages

Advantages

• Non-volatile storage: The AT28C64-12SI retains data even when power is removed, ensuring data integrity.
• Fast access time: With a speed rating of 120 nanoseconds, this chip allows for quick retrieval of stored data.
• Low power consumption: The AT28C64-12SI operates with low power consumption, making it suitable for battery-powered devices.

Disadvantages

• Limited storage capacity: While 64 kilobits is sufficient for many applications, it may not be suitable for storing large amounts of data.
• Limited write endurance: EEPROMs have a limited number of program/erase cycles, and excessive usage can degrade their performance over time.

Working Principles

The AT28C64-12SI utilizes a floating-gate transistor structure to store data. When programming, an electric charge is applied to the floating gate, altering its electrical characteristics. This change determines whether the transistor represents a logical "0" or "1". Erasing the chip involves removing the charge from the floating gate, resetting the transistor's state.

Detailed Application Field Plans

The AT28C64-12SI finds applications in various electronic devices, including but not limited to: