AT28HC256-12JA

Product Overview

Category

AT28HC256-12JA belongs to the category of high-speed, high-capacity EEPROM (Electrically Erasable Programmable Read-Only Memory) 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 AT28HC256-12JA offers fast read and write access times, making it suitable for applications that require quick data retrieval.
• High capacity: With a storage capacity of 256 kilobits, this EEPROM chip provides ample space for storing critical data.
• Low power consumption: The AT28HC256-12JA is designed to operate efficiently with low power requirements, making it ideal for battery-powered devices.
• Reliable data retention: This chip ensures data integrity by offering excellent data retention capabilities even under harsh environmental conditions.

Package

The AT28HC256-12JA is available in a standard 32-pin plastic dual in-line package (PDIP), which facilitates easy integration into circuit boards.

Essence

The essence of the AT28HC256-12JA lies in its ability to provide reliable and high-speed non-volatile data storage, enabling efficient operation of electronic devices.

Packaging/Quantity

This product is typically packaged in reels or tubes, with each containing a specific quantity of AT28HC256-12JA chips. The exact packaging and quantity may vary depending on the supplier.

Specifications

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

Detailed Pin Configuration

The AT28HC256-12JA features a 32-pin configuration. The pinout is as follows:

1. A0
2. A1
3. A2
4. A3
5. A4
6. A5
7. A6
8. A7
9. VSS (Ground)
10. E (Chip Enable)
11. G (Output Enable)
12. WE (Write Enable)
13. OE (Output Enable)
14. I/O0
15. I/O1
16. I/O2
17. I/O3
18. I/O4
19. I/O5
20. I/O6
21. I/O7
22. VCC (Power)
23. NC (No Connection)
24. NC
25. NC
26. NC
27. NC
28. NC
29. NC
30. NC
31. NC
32. NC

Functional Features

• High-speed operation allows for quick data access and retrieval.
• Low power consumption ensures efficient use of energy resources.
• Reliable data retention capabilities ensure the integrity of stored information.
• Parallel interface simplifies integration into existing electronic systems.

Advantages and Disadvantages

Advantages

• Fast read and write access times enhance overall system performance.
• High storage capacity accommodates large amounts of data.
• Low power consumption prolongs battery life in portable devices.
• Excellent data retention capabilities ensure long-term reliability.

Disadvantages

• Limited compatibility with certain microcontrollers or systems that require different interfaces.
• Relatively higher cost compared to lower-capacity EEPROM chips.
• Sensitivity to extreme environmental conditions may affect performance.

Working Principles

The AT28HC256-12JA operates based on the principles of EEPROM technology. It utilizes electrically controlled floating gate transistors to store and retrieve data. When a write operation is performed, an electric charge is applied to the floating gate, altering its electrical characteristics and storing the desired data. During a read operation, the stored charge is measured, allowing the retrieval of the stored information.

Detailed Application Field Plans

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

1. Microcontroller-based systems: Used for program storage and data logging.
2. Computer systems: Employed for BIOS (Basic Input/Output System) storage and firmware updates.
3. Consumer electronics: Utilized for configuration settings, calibration data, and user preferences storage in devices such as TVs, audio players, and gaming consoles.

Detailed and Complete Alternative Models

1. AT28C256-15PU: Similar to AT28HC256-12JA but operates at a slower speed (150 ns).
2. AT28HC256E-12SI: Offers the same specifications as AT28HC256-12JA but comes in a surface-mount package.
3. AT28HC256-90SU: Provides a higher access time (900 ns) but offers lower power consumption.

These alternative models