AT28HC256E-90LM/883

Product Overview

Category

AT28HC256E-90LM/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 AT28HC256E-90LM/883 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.
• Extended temperature range: The AT28HC256E-90LM/883 can operate reliably in a wide temperature range, from -55°C to +125°C.
• Durable package: It comes in a hermetic ceramic package, ensuring protection against environmental factors like moisture and mechanical stress.

Packaging/Quantity

The AT28HC256E-90LM/883 is typically packaged in a 28-pin ceramic Dual In-Line Package (DIP). It is available in quantities suitable for both small-scale and large-scale production.

Specifications

• Supply voltage: 4.5V to 5.5V
• Operating current: 30 mA (max)
• Standby current: 100 µA (max)
• Access time: 90 ns
• Data retention: 10 years (minimum)
• Endurance: 100,000 write cycles (minimum)

Pin Configuration

The AT28HC256E-90LM/883 has a total of 28 pins, each serving a specific function. The pin configuration is as follows:

1. A16
2. A15
3. A12
4. A7
5. A6
6. A5
7. A4
8. A3
9. A2
10. A1
11. A0
12. E (Chip Enable)
13. G (Output Enable)
14. Vcc (Power Supply)
15. Q7
16. Q6
17. Q5
18. Q4
19. Q3
20. Q2
21. Q1
22. Q0
23. CE (Chip Enable)
24. OE (Output Enable)
25. WE (Write Enable)
26. NC (No Connection)
27. Vss (Ground)
28. A8

Functional Features

• Byte-wise and page-wise write operations: The AT28HC256E-90LM/883 supports both byte-level and page-level write operations, providing flexibility in data storage.
• Hardware and software protection: This EEPROM chip offers various protection mechanisms to prevent unauthorized access or accidental modification of stored data.
• High reliability: With advanced error correction techniques and robust design, the AT28HC256E-90LM/883 ensures reliable data retention and integrity.

Advantages and Disadvantages

Advantages

• Fast operation speed
• Low power consumption
• Large storage capacity
• Extended temperature range
• Durable package for enhanced protection

Disadvantages

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

Working Principles

The AT28HC256E-90LM/883 utilizes a combination of electrically controlled floating gate transistors and semiconductor technology to store and retrieve data. It employs a series of voltage levels and control signals to perform read, write, and erase operations on specific memory locations.

Detailed Application Field Plans

The AT28HC256E-90LM/883 finds applications in various fields, including: 1. Embedded systems: Used for firmware storage in microcontrollers and other embedded devices. 2. Communication systems: Enables data storage for network routers, switches, and telecommunication equipment. 3. Automotive electronics: Provides non-volatile memory for automotive control units and infotainment systems. 4. Industrial automation: Utilized in programmable logic controllers (PLCs) and industrial monitoring systems. 5. Medical devices: Used for storing critical patient data in medical equipment and devices.

Detailed and Complete Alternative Models

1. AT28C256-15PU: A similar EEPROM chip with a lower access time of 150 ns.
2. AT28HC256E-12PI: Offers a higher endurance of 1,000,000 write cycles.
3. AT28BV256-20TI: Provides a wider operating temperature range (-40°C to +85°C) suitable for harsh environments.

These alternative models offer different specifications and features, allowing users to choose the most appropriate option based on their specific requirements.

*