AT28HC256-70JC

Product Overview

Category

AT28HC256-70JC 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
• Low power consumption
• Non-volatile memory
• Large storage capacity
• Reliable data retention
• Easy to interface with other electronic components

Package

AT28HC256-70JC comes in a standard 32-pin PLCC (Plastic Leaded Chip Carrier) package. The package provides mechanical protection and facilitates easy integration into circuit boards.

Essence

The essence of AT28HC256-70JC lies in its ability to store and retrieve digital information reliably, even when the power supply is removed. This makes it an essential component for preserving critical data in electronic systems.

Packaging/Quantity

AT28HC256-70JC is typically sold in reels or tubes, with each reel or tube containing a specific quantity of chips. The exact packaging and quantity may vary depending on the manufacturer and supplier.

Specifications

• Operating Voltage: 2.7V to 5.5V
• Storage Capacity: 256 kilobits (32 kilobytes)
• Access Time: 70 nanoseconds
• Interface: Parallel
• Data Retention: Up to 10 years
• Endurance: 100,000 write cycles

Detailed Pin Configuration

The AT28HC256-70JC chip has a total of 32 pins, which are assigned specific functions. The pin configuration is as follows:

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. A8 - Address Input
10. A9 - Address Input
11. A10 - Address Input
12. A11 - Address Input
13. A12 - Address Input
14. A13 - Address Input
15. A14 - Address Input
16. A15 - Address Input
17. /OE - Output Enable
18. /WE - Write Enable
19. /CE - Chip Enable
20. I/O0 - Data Input/Output
21. I/O1 - Data Input/Output
22. I/O2 - Data Input/Output
23. I/O3 - Data Input/Output
24. I/O4 - Data Input/Output
25. I/O5 - Data Input/Output
26. I/O6 - Data Input/Output
27. I/O7 - Data Input/Output
28. Vcc - Power Supply
29. GND - Ground
30. NC - No Connection
31. NC - No Connection
32. /WP - Write Protect

Functional Features

• High-speed operation allows for quick data access and transfer.
• Low power consumption ensures efficient use of energy in electronic devices.
• Non-volatile memory retains stored data even when the power supply is disconnected.
• Large storage capacity provides ample space for storing critical information.
• Easy interface with other electronic components simplifies integration into various systems.

Advantages and Disadvantages

Advantages

• Fast operation speed enables rapid data processing.
• Low power consumption prolongs battery life in portable devices.
• Reliable data retention ensures data integrity over extended periods.
• Ample storage capacity accommodates a wide range of applications.
• Easy integration with other components simplifies system design.

Disadvantages

• Limited endurance of 100,000 write cycles may be a constraint in certain applications.
• Higher cost compared to other memory technologies like Flash or SRAM.

Working Principles

AT28HC256-70JC utilizes EEPROM technology, which allows for both reading and writing of data. It stores information by trapping electric charges within its memory cells. When data needs to be written, the charges are manipulated using electrical signals. During read operations, the trapped charges are detected and converted back into digital information.

Detailed Application Field Plans

AT28HC256-70JC finds application in various fields, including:

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

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to AT28HC256-70JC include:

1. AT28C256 - Low-power CMOS version