AT28HC256E-70TI

Product Overview

Category

AT28HC256E-70TI 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 storage of data in various electronic devices such as microcontrollers, computers, and consumer electronics.

Characteristics

• High-speed operation: The AT28HC256E-70TI 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, this chip can store a significant amount of data.
• Reliable data retention: The AT28HC256E-70TI ensures data integrity with its reliable non-volatile memory technology.

Package and Quantity

The AT28HC256E-70TI is available in a standard 28-pin Thin Small Outline Package (TSOP). It is typically sold in reels containing multiple units.

Specifications

• Operating voltage: 2.7V to 5.5V
• Access time: 70 nanoseconds
• Organization: 32,768 words x 8 bits
• Endurance: 100,000 write cycles
• Data retention: 10 years

Pin Configuration

The AT28HC256E-70TI has a total of 28 pins, each serving a specific function. The detailed 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)

Functional Features

• Byte-wise programmable: The AT28HC256E-70TI allows individual bytes to be programmed or erased, providing flexibility in data storage and modification.
• Hardware and software protection: This chip offers various protection mechanisms to prevent unauthorized access or accidental modifications to stored data.
• High reliability: With built-in error correction and detection mechanisms, the AT28HC256E-70TI ensures reliable data storage and retrieval.

Advantages

• Fast operation speed enables quick access to stored data.
• Low power consumption prolongs battery life in portable devices.
• Large storage capacity accommodates a wide range of applications.
• Reliable data retention ensures long-term integrity of stored information.

Disadvantages

• Limited write endurance may require careful management of write cycles in certain applications.
• Higher cost compared to other non-volatile memory options like Flash memory.

Working Principles

The AT28HC256E-70TI utilizes EEPROM technology, which allows for electrically erasing and reprogramming of data. It stores information by trapping electrical charges within floating gate transistors, ensuring data persistence even when power is removed.

Application Field Plans

The AT28HC256E-70TI finds applications in various fields, including: 1. Embedded systems: Used for firmware storage in microcontrollers and system-on-chip devices. 2. Automotive electronics: Enables data storage for engine control units, infotainment systems, and instrument clusters. 3. Industrial automation: Provides non-volatile memory for programmable logic controllers (PLCs) and human-machine interfaces (HMIs). 4. Consumer electronics: Utilized in devices such as smart TVs, set-top boxes, and gaming consoles for data storage and firmware updates.

Alternative Models

For those seeking alternative options, the following EEPROM chips can be considered: 1. AT24C256 - Similar capacity and features, but with a slower access time. 2. AT93C256 - Smaller package size and lower power consumption, but with a reduced operating voltage range.

In conclusion, the AT28HC256E-70TI 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 embedded systems, automotive electronics, industrial automation, and consumer electronics. While it has limitations in terms of write endurance and cost, alternative models like AT24C256 and AT93C256 provide different trade-offs to consider.