AT28C64E-20SC

Product Overview

Category

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

Use

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

Characteristics

• Electrically erasable: The AT28C64E-20SC can be erased and reprogrammed electronically, making it convenient for updating stored data.
• Non-volatile: The stored data remains intact even when power is removed.
• High capacity: This chip has a storage capacity of 64 kilobits (8 kilobytes), allowing for significant data storage.
• Low power consumption: The AT28C64E-20SC operates on low power, making it suitable for battery-powered devices.
• Fast access time: With a maximum access time of 200 nanoseconds, this chip ensures quick retrieval of stored data.

Package and Quantity

The AT28C64E-20SC is available in a small outline integrated circuit (SOIC) package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Supply voltage: 2.7V to 5.5V
• Operating temperature range: -40°C to +85°C
• Maximum clock frequency: 20 MHz
• Data retention: 10 years
• Endurance: 100,000 write/erase cycles

Pin Configuration

The AT28C64E-20SC has a total of 28 pins, which are assigned specific functions as follows:

1. A0-A13: Address inputs
2. CE: Chip enable
3. OE: Output enable
4. WE: Write enable
5. VCC: Power supply
6. GND: Ground
7. DQ0-DQ7: Data inputs/outputs

Functional Features

• Byte-wise programmable: The AT28C64E-20SC allows individual bytes to be programmed or erased, providing flexibility in data manipulation.
• Hardware and software protection: This chip offers various protection mechanisms to prevent accidental modification or erasure of stored data.
• Automatic page write: It supports the efficient programming of multiple bytes within a single page.

Advantages and Disadvantages

Advantages

• High storage capacity
• Fast access time
• Low power consumption
• Flexible programming options

Disadvantages

• Limited endurance compared to other memory technologies
• Relatively higher cost per bit compared to some alternatives

Working Principles

The AT28C64E-20SC utilizes a floating-gate transistor structure to store data. When a byte is programmed, charge is trapped in the floating gate, representing a logical "1." Erasing the byte removes the charge, resulting in a logical "0." The state of each memory cell is determined by the presence or absence of charge in its floating gate.

Detailed Application Field Plans

The AT28C64E-20SC finds applications in various fields, including: 1. Embedded systems: Used for firmware storage in microcontrollers and system-on-chip devices. 2. Computer peripherals: Employed for storing configuration data in printers, scanners, and network devices. 3. Automotive electronics: Utilized for data storage in engine control units, infotainment systems, and instrument clusters. 4. Industrial automation: Used for program storage in PLCs (Programmable Logic Controllers) and industrial control systems.

Detailed and Complete Alternative Models

1. AT28C256-15PU: A higher-capacity EEPROM chip with 256 kilobits (32 kilobytes) of storage.
2. AT24C02N: A smaller EEPROM chip with 2 kilobits (256 bytes) of storage, suitable for applications with lower memory requirements.
3. AT93C46A-10SU-2.7: A serial EEPROM chip with 1 kilobit (128 bytes) of storage, designed for space-constrained applications.

These alternative models offer different capacities and features to cater to diverse application needs.

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