AT28HC256F-70LI

Product Overview

Category

AT28HC256F-70LI 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 AT28HC256F-70LI 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-70LI can operate reliably within a wide temperature range, making it suitable for use in harsh environments.
• High endurance: This chip supports a high number of erase/write cycles, ensuring long-term reliability.

Package and Quantity

The AT28HC256F-70LI is available in a 28-pin plastic dual in-line package (PDIP). 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
• Access time: 70 nanoseconds
• Organization: 32K x 8 bits
• Interface: Serial Peripheral Interface (SPI)
• Data retention: 10 years

Pin Configuration

The AT28HC256F-70LI features a 28-pin configuration with the following pin assignments:

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)

Functional Features

• Random access: The chip allows random access to any memory location, enabling efficient data retrieval.
• Byte-level operations: It supports byte-level read and write operations, providing flexibility in managing data.
• Hardware and software protection: The AT28HC256F-70LI offers various protection mechanisms to prevent unauthorized access or accidental modification of stored data.
• High-speed programming: This EEPROM chip supports fast programming operations, reducing overall system latency.

Advantages and Disadvantages

Advantages

• High-speed operation enables quick access to stored data.
• Low power consumption prolongs battery life in portable devices.
• Large storage capacity accommodates a wide range of applications.
• Extended temperature range ensures reliable performance in harsh environments.
• High endurance guarantees long-term reliability.

Disadvantages

• Limited storage capacity compared to other non-volatile memory options like Flash memory.
• Higher cost per bit compared to some alternative memory technologies.

Working Principles

The AT28HC256F-70LI utilizes EEPROM technology, which allows for non-volatile data storage. It uses a combination of floating-gate transistors and electrically controlled gates to store and retrieve data. The chip's internal circuitry manages the reading, writing, and erasing of data based on the control signals received from the host device.

Detailed Application Field Plans

The AT28HC256F-70LI finds application in various fields, including: 1. Embedded systems: Used for storing firmware, configuration data, and critical parameters in microcontrollers and embedded systems. 2. Automotive electronics: Employed in automotive control units for storing calibration data, fault codes, and other essential information. 3. Industrial automation: Utilized in programmable logic controllers (PLCs) and industrial equipment for data logging, configuration storage, and firmware updates. 4. Consumer electronics: Integrated into devices such as smart TVs, set-top boxes, and gaming consoles to store user preferences, settings, and firmware.

Detailed and Complete Alternative Models

1. AT28C256-15PU: A similar EEPROM chip with a capacity of 256 kilobits, operating at a slower speed of 150 nanoseconds.
2. AT24C256C-SSHL-T: An I2C-compatible EEPROM chip with the same capacity, offering a different interface option.
3. M93C86-WMN6TP: A serial EEPROM chip with a capacity of 16 kilobits, suitable for smaller-scale applications.

These alternative models provide options based on specific requirements, such as interface compatibility, speed, and storage capacity.

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