AT28HC64B-90SC

Product Overview

Category

AT28HC64B-90SC belongs to the category of high-speed, low-power Electrically Erasable Programmable Read-Only Memory (EEPROM) chips.

Use

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

Characteristics

• High-speed operation: The AT28HC64B-90SC offers fast read and write operations, making it suitable for applications requiring quick access to stored data.
• Low power consumption: This EEPROM chip is designed to minimize power consumption, making it ideal for battery-powered devices.
• Non-volatile memory: The stored data remains intact even when the power supply is disconnected.
• High endurance: The AT28HC64B-90SC can withstand a large number of erase/write cycles, ensuring long-term reliability.

Package

The AT28HC64B-90SC is available in a small outline SOIC package, which provides ease of integration into various circuit designs.

Essence

The essence of this product lies in its ability to provide reliable, non-volatile data storage with high-speed operation and low power consumption.

Packaging/Quantity

The AT28HC64B-90SC is typically packaged in reels or tubes, containing a specific quantity of chips per package. The exact packaging and quantity may vary depending on the manufacturer's specifications.

Specifications

• Memory capacity: 64 kilobits (8 kilobytes)
• Operating voltage: 2.7V to 5.5V
• Access time: 90 nanoseconds
• Data retention: More than 10 years
• Endurance: Minimum 100,000 erase/write cycles
• Interface: Serial Peripheral Interface (SPI)

Detailed Pin Configuration

The AT28HC64B-90SC has a total of 8 pins, each serving a specific purpose. The pin configuration is as follows:

1. Chip Enable (CE): Enables the chip for read/write operations.
2. Write Enable (WE): Controls the write operation.
3. Output Enable (OE): Enables the output data buffer.
4. Serial Data Input (SI): Receives serial data during write operations.
5. Serial Data Output (SO): Outputs serial data during read operations.
6. Serial Clock (SCK): Provides the clock signal for synchronous communication.
7. Vcc: Power supply voltage.
8. Ground (GND): Common ground reference.

Functional Features

• Random access: Allows direct access to any memory location for read or write operations.
• Byte-level programming: Supports byte-level programming, enabling efficient use of memory space.
• Hardware and software protection: Provides options for hardware and software-based protection of stored data.
• Automatic page write: Facilitates faster write operations by allowing multiple bytes to be programmed in a single operation.

Advantages and Disadvantages

Advantages

• High-speed operation enables quick access to stored data.
• Low power consumption prolongs battery life in portable devices.
• Non-volatile memory ensures data integrity even during power loss.
• High endurance guarantees long-term reliability.
• Compact package allows for easy integration into various circuit designs.

Disadvantages

• Limited storage capacity compared to other memory technologies.
• Relatively higher cost per bit compared to some alternative memory solutions.
• Requires an external microcontroller or interface for communication.

Working Principles

The AT28HC64B-90SC utilizes EEPROM technology, which combines the benefits of both electrically erasable programmable read-only memory (EEPROM) and flash memory. It stores data using floating-gate transistors that can retain charge even when the power supply is disconnected.

During write operations, the desired data is sent serially to the chip, which programs the memory cells accordingly. Reading data involves sending a read command and receiving the data serially from the chip.

Detailed Application Field Plans

The AT28HC64B-90SC finds applications in various fields, including:

1. Microcontrollers: Used for storing firmware, configuration data, and calibration values.
2. Computers: Employed in BIOS chips, expansion cards, and other peripheral devices.
3. Consumer electronics: Utilized in smart TVs, set-top boxes, and gaming consoles for data storage.
4. Automotive: Integrated into electronic control units (ECUs) for storing critical vehicle data.
5. Industrial automation: Used in programmable logic controllers (PLCs) for storing program code and configuration data.

Detailed and Complete Alternative Models

1. AT28C64B-15PU: Similar EEPROM chip with a lower access time of 150 nanoseconds.
2. AT24C64A-10PU-2.7: I2C-compatible EEPROM chip with a capacity of 64 kilobits.
3. M93C66-WMN6P: Serial EEPROM chip with