AT28HC256E-70JU-T

Product Overview

Category

AT28HC256E-70JU-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-70JU-T offers fast read and write access times, making it suitable for applications requiring quick data retrieval.
• 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-70JU-T ensures long-term data integrity with its excellent data retention capabilities.
• Robust package: It comes in a JEDEC-standard 32-lead PLCC (Plastic Leaded Chip Carrier) package, ensuring mechanical stability and ease of integration into circuit boards.

Packaging/Quantity

The AT28HC256E-70JU-T is typically packaged in reels or tubes, containing a specified quantity of chips. The exact packaging and quantity may vary depending on the supplier and customer requirements.

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)
• Write endurance: 100,000 cycles
• Data retention: 10 years

Detailed Pin Configuration

The AT28HC256E-70JU-T has a total of 32 pins, which are assigned specific functions. 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)

Please refer to the datasheet for a complete pinout diagram and detailed information on each pin's functionality.

Functional Features

• Byte-wise Read and Write: The AT28HC256E-70JU-T allows individual byte-level read and write operations, providing flexibility in data manipulation.
• Hardware Data Protection: This EEPROM chip incorporates hardware protection mechanisms to prevent accidental data corruption during power fluctuations or system failures.
• Software Write Protection: It supports software-based write protection, allowing specific memory areas to be locked to prevent unauthorized modifications.
• Fast Page Write: The chip supports fast page write operations, enabling efficient programming of multiple bytes within a single page.

Advantages and Disadvantages

Advantages

• High-speed operation facilitates quick data access.
• Low power consumption prolongs battery life in portable devices.
• Large storage capacity accommodates substantial amounts of data.
• Reliable data retention ensures long-term integrity.
• Robust package enhances mechanical stability.

Disadvantages

• Limited write endurance may restrict certain high-write applications.
• Higher cost compared to other non-volatile memory options like Flash memory.

Working Principles

The AT28HC256E-70JU-T utilizes EEPROM technology, which allows for electrically erasing and reprogramming data. It stores information by trapping electrical charges within floating gate transistors. When reading data, the stored charge is detected, and the corresponding binary value is retrieved. During a write operation, the trapped charge is modified or erased using an electrical voltage pulse.

Detailed Application Field Plans

The AT28HC256E-70JU-T finds applications in various fields, including but not limited to:

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

Detailed and Complete Alternative Models

1. AT28C256-15PU: A similar EEPROM chip with a slower access time of 150 nanoseconds.
2. AT24C256C-SSHL-T: An I2C-compatible EEPROM chip with the same storage capacity but different interface and package options.
3. M93C86-WMN6P: A serial EEPROM chip from another manufacturer, offering comparable specifications and functionality.

Please note that the above alternative models are provided as examples, and there may be other suitable alternatives available in the market.

In conclusion, the AT28HC256E-70JU-T is a high-speed, low-power EEPROM chip with a