AT28HC256E-12SU-T

Product Overview

Category

AT28HC256E-12SU-T 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 AT28HC256E-12SU-T 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.
• Large storage capacity: With a capacity of 256 kilobits (32 kilobytes), this chip provides ample space for storing critical data.
• Reliable data retention: The AT28HC256E-12SU-T ensures data integrity with a guaranteed minimum retention time of 10 years.
• Extended temperature range: It can operate reliably within a wide temperature range of -40°C to +85°C.

Package and Quantity

The AT28HC256E-12SU-T is available in a small form factor surface-mount package. It comes in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Organization: 32K x 8 bits
• Supply Voltage: 2.7V to 5.5V
• Access Time: 120 ns
• Standby Current: 1 µA (typical)
• Operating Temperature Range: -40°C to +85°C
• Interface: Serial Peripheral Interface (SPI)

Pin Configuration

The AT28HC256E-12SU-T has a total of 28 pins. The pin configuration is as follows:

┌───┬───┬───┬───┬───┬───┬───┬───┐ │ 1 │ 2 │ 3 │ 4 │ 5 │ 6 │ 7 │ 8 │ ├───┼───┼───┼───┼───┼───┼───┼───┤ │ 9 │10 │11 │12 │13 │14 │15 │16 │ ├───┼───┼───┼───┼───┼───┼───┼───┤ │17 │18 │19 │20 │21 │22 │23 │24 │ ├───┼───┼───┼───┼───┼───┼───┼───┤ │25 │26 │27 │28 │NC │GND│VCC│NC │ └───┴───┴───┴───┴───┴───┴───┴───┘

Functional Features

• High-speed data transfer: The AT28HC256E-12SU-T supports a Serial Peripheral Interface (SPI) for fast and efficient data transfer.
• Write protection: It offers hardware and software write protection mechanisms to prevent accidental modification of stored data.
• Page write mode: This chip allows multiple bytes of data to be written in a single programming operation, enhancing efficiency.
• Software and hardware reset: The AT28HC256E-12SU-T provides options for both software and hardware resets, ensuring flexibility in system design.

Advantages and Disadvantages

Advantages

• Fast read and write operations enable quick access to data.
• Low power consumption prolongs battery life in portable devices.
• Ample storage capacity for various applications.
• Reliable data retention ensures long-term integrity.
• Wide operating temperature range allows usage in diverse environments.

Disadvantages

• Limited storage capacity compared to higher-capacity EEPROM chips.
• Higher cost per kilobit compared to larger memory chips.
• Requires an external microcontroller or interface for communication.

Working Principles

The AT28HC256E-12SU-T operates based on the principles of EEPROM technology. It utilizes a floating gate transistor structure to store and retrieve data. When data is written, charge is trapped in the floating gate, altering the transistor's behavior. This change can be detected during read operations, allowing stored data to be retrieved accurately.

Detailed Application Field Plans

The AT28HC256E-12SU-T finds application in various fields, including but not limited to: 1. Embedded systems: Used for firmware storage in microcontrollers and system-on-chip (SoC) devices. 2. Automotive electronics: Employed for storing critical data in automotive control units and infotainment systems. 3. Industrial