AT28HC64B-90JC

Product Overview

Category

AT28HC64B-90JC 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-90JC 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 or interrupted.
• High endurance: The AT28HC64B-90JC can withstand a large number of erase/write cycles, ensuring long-term reliability.

Package

The AT28HC64B-90JC comes in a 32-pin PLCC (Plastic Leaded Chip Carrier) package. This package provides mechanical protection and facilitates easy integration into circuit boards.

Essence

The essence of the AT28HC64B-90JC lies in its ability to store and retrieve data reliably and efficiently, offering a high-speed and low-power solution for non-volatile memory requirements.

Packaging/Quantity

The AT28HC64B-90JC is typically packaged in reels or tubes, with each containing a specific quantity of chips. The exact packaging and quantity may vary depending on the supplier and customer requirements.

Specifications

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

Detailed Pin Configuration

The AT28HC64B-90JC has a total of 32 pins, each serving a specific function. The pin configuration is as follows:

1. Chip Enable (CE)
2. Output Enable (OE)
3. Write Enable (WE)
4. Address Inputs (A0-A14)
5. Data Inputs/Outputs (DQ0-DQ7)
6. Supply Voltage (VCC)
7. Ground (GND)

(Note: The remaining pins are not listed here for brevity.)

Functional Features

• Random access: The AT28HC64B-90JC allows random access to any memory location, enabling efficient data retrieval.
• Byte-wise programming: This EEPROM chip supports byte-wise programming, allowing selective modification of specific data bytes without affecting the entire memory contents.
• Hardware and software protection: The AT28HC64B-90JC provides various protection mechanisms, including write protection and lock bits, to prevent unauthorized modification of stored data.

Advantages and Disadvantages

Advantages

• High-speed operation enables quick access to stored data.
• Low power consumption makes it suitable for battery-powered devices.
• Non-volatile memory ensures data retention even during power interruptions.
• High endurance guarantees long-term reliability.
• Byte-wise programming allows selective modification of data.

Disadvantages

• Limited storage capacity compared to other memory technologies.
• Relatively higher cost per kilobit compared to larger capacity EEPROMs.

Working Principles

The AT28HC64B-90JC utilizes EEPROM technology, which combines the benefits of both Electrically Erasable Programmable Read-Only Memory (EEPROM) and Flash memory. It stores data in floating-gate transistors, which can be electrically programmed and erased.

During write operations, the desired data is transferred to the chip's internal buffer and then programmed into the memory cells. Reading data involves accessing specific memory locations and retrieving the stored information.

Detailed Application Field Plans

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

1. Microcontrollers: Used for storing firmware, configuration settings, and calibration data.
2. Computers: Employed in BIOS (Basic Input/Output System) chips for non-volatile storage of system initialization code.
3. Consumer electronics: Utilized in devices such as smart TVs, set-top boxes, and gaming consoles for data storage and firmware updates.

Detailed and Complete Alternative Models

1. AT28C64B-15PU: A similar EEPROM chip with a lower access time of 150 nanoseconds.
2. AT28HC256-12PC: Offers a higher memory capacity of 256 kilobits (32 kilobytes) with a slightly slower access time of 120 nanoseconds.
3. AT28BV16-20SC: Provides a smaller memory capacity of 16 kilobits (2 kilobytes) but operates at a faster access time of 20 nanoseconds.

(Note: