AT28HC256-12TA

Product Overview

Category

AT28HC256-12TA 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 AT28HC256-12TA 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 operate efficiently with minimal power consumption, extending battery life in portable devices.
• Large storage capacity: With a capacity of 256 kilobits (32 kilobytes), the AT28HC256-12TA provides ample space for storing critical data.
• Reliable data retention: The EEPROM technology ensures that data remains intact even when power is disconnected.
• Robust package: The chip is housed in a compact and durable package, protecting it from external factors such as moisture and physical damage.

Packaging/Quantity

The AT28HC256-12TA is typically available in surface mount packages, such as SOIC (Small Outline Integrated Circuit) or PDIP (Plastic Dual In-Line Package). It is commonly sold in reels or tubes containing multiple units.

Specifications

• Operating voltage: 2.7V to 5.5V
• Access time: 120 ns
• Organization: 32K x 8 bits
• Interface: Serial I2C
• Write endurance: 100,000 cycles
• Data retention: 10 years
• Operating temperature range: -40°C to +85°C

Detailed Pin Configuration

The AT28HC256-12TA has a total of 28 pins, which are assigned specific functions. Here is a detailed pin configuration:

1. A0 - Address Input
2. A1 - Address Input
3. A2 - Address Input
4. A3 - Address Input
5. A4 - Address Input
6. A5 - Address Input
7. A6 - Address Input
8. A7 - Address Input
9. VSS - Ground
10. A8 - Address Input
11. A9 - Address Input
12. A10 - Address Input
13. A11 - Address Input
14. A12 - Address Input
15. A13 - Address Input
16. A14 - Address Input
17. WP - Write Protect
18. SDA - Serial Data Input/Output
19. SCL - Serial Clock Input
20. VCC - Power Supply
21. NC - No Connection
22. NC - No Connection
23. NC - No Connection
24. NC - No Connection
25. NC - No Connection
26. NC - No Connection
27. NC - No Connection
28. NC - No Connection

Functional Features

• Byte-wise Read and Write: The AT28HC256-12TA allows individual bytes to be read from or written to, providing flexibility in data manipulation.
• Page Write Mode: This feature enables multiple bytes to be programmed simultaneously, improving overall write performance.
• Software and Hardware Protection: The chip supports both software and hardware protection mechanisms to prevent unauthorized access or modification of stored data.
• Sequential Read: The EEPROM supports sequential read operations, allowing for efficient retrieval of consecutive data bytes.

Advantages and Disadvantages

Advantages

• High-speed operation facilitates quick data access.
• Low power consumption extends battery life in portable devices.
• Large storage capacity accommodates ample data.
• Reliable data retention ensures data integrity.
• Robust packaging protects the chip from external factors.

Disadvantages

• Limited write endurance of 100,000 cycles.
• Higher cost compared to other non-volatile memory options.

Working Principles

The AT28HC256-12TA utilizes EEPROM technology, which allows for electrically erasing and reprogramming data. It consists of a grid of memory cells that can be individually addressed for read or write operations. The chip uses a combination of electrical signals and control logic to perform these operations accurately and efficiently.

Detailed Application Field Plans

The AT28HC256-12TA finds applications in various fields, including:

1. Microcontrollers: Used for storing firmware, configuration data, and calibration parameters.
2. Computers: Employed in BIOS (Basic Input/Output System) chips for storing system settings and boot code.
3. Consumer Electronics: Utilized in devices such as smart TVs, set-top boxes, and gaming consoles for storing user preferences, settings, and firmware updates.

Detailed and Complete Alternative Models

1. AT28C256-15PU: Similar to the AT28HC256-12TA, this model offers a capacity of 256 kilobits with a slightly slower access time of