AT28HC256F-12LM/883

Product Overview

Category

AT28HC256F-12LM/883 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 communication systems.

Characteristics

• High-speed operation: The AT28HC256F-12LM/883 offers fast read and write operations, making it suitable for applications that require quick access to stored data.
• Low power consumption: This EEPROM chip is designed to minimize power consumption, making it ideal for battery-powered devices.
• Large storage capacity: With a capacity of 256 kilobits (32 kilobytes), this chip provides ample space for storing critical data.
• Extended temperature range: The AT28HC256F-12LM/883 is capable of operating reliably in extreme temperature conditions, ranging from -55°C to +125°C.

Package

The AT28HC256F-12LM/883 comes in a 28-pin ceramic leadless chip carrier (CLCC) package. This package ensures durability and efficient heat dissipation.

Essence

The essence of the AT28HC256F-12LM/883 lies in its ability to store and retrieve data reliably, quickly, and with low power consumption.

Packaging/Quantity

This product is typically packaged in tubes or trays, with each containing a specific quantity of chips. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Organization: 32K x 8 bits
• Supply voltage: 2.7V to 5.5V
• Access time: 120 ns
• Standby current: 10 µA (typical)
• Operating temperature range: -55°C to +125°C
• Data retention: 10 years

Detailed Pin Configuration

The AT28HC256F-12LM/883 has a total of 28 pins, each serving a specific purpose. 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 chip allows random access to any memory location, enabling efficient data retrieval.
• Byte-wise programming: The AT28HC256F-12LM/883 supports byte-wise programming, allowing individual bytes to be written without affecting the rest of the memory.
• Hardware and software protection: This EEPROM chip provides various protection mechanisms to prevent accidental writes or unauthorized access to stored data.
• High endurance: With a minimum of 100,000 write cycles, this chip ensures long-term reliability and durability.

Advantages and Disadvantages

Advantages

• Fast read and write operations
• Low power consumption
• Large storage capacity
• Extended temperature range
• Efficient heat dissipation due to CLCC package

Disadvantages

• Relatively higher cost compared to other non-volatile memory options
• Limited endurance compared to some newer memory technologies

Working Principles

The AT28HC256F-12LM/883 utilizes a combination of electronic circuits and floating gate transistors to store and retrieve data. When data is written, an electric charge is trapped in the floating gate, altering the transistor's behavior. This alteration allows the chip to retain the written data even when the power supply is removed. During read operations, the stored charge is sensed, and the corresponding data is retrieved.

Detailed Application Field Plans

The AT28HC256F-12LM/883 finds applications in various fields, including:

1. Microcontrollers: Used for storing firmware, configuration data, and critical parameters.
2. Computers: Employed in BIOS chips, expansion cards, and other memory-dependent components.
3. Communication systems: Utilized for storing network settings, encryption keys, and firmware updates.

Detailed and Complete Alternative Models

1. AT28C256: Similar to the AT28HC256F-12LM/883 but with a slower access time of 200 ns.
2. AT28HC256E: Offers an extended temperature range of -40°C to +85°C.
3. AT28HC256L: Low-power variant with reduced standby current.

These alternative models provide options based on specific requirements such as speed, temperature range, and power consumption.

In conclusion, the AT28HC256F-12LM/883 is a high-speed, low-power EEPROM chip that offers large storage capacity and reliable data retention. Its versatility makes it suitable for various applications in microcontrollers, computers