AT27C040-70PU

Product Overview

Category

AT27C040-70PU belongs to the category of programmable read-only memory (PROM) chips.

Use

This product is commonly used for storing permanent data or code that needs to be retained even when power is turned off. It is widely utilized in various electronic devices such as computers, microcontrollers, and consumer electronics.

Characteristics

• Non-volatile: The stored data remains intact even without power supply.
• Programmable: The memory can be programmed electrically.
• Read-only: Once programmed, the data cannot be modified.

Package

AT27C040-70PU is available in a 32-pin DIP (Dual Inline Package) format.

Essence

The essence of this product lies in its ability to provide reliable and non-volatile storage for critical data or code in electronic systems.

Packaging/Quantity

AT27C040-70PU is typically packaged in tubes or trays, with each package containing a specific quantity of chips. The exact packaging and quantity may vary depending on the manufacturer.

Specifications

• Operating Voltage: 5V
• Access Time: 70 nanoseconds
• Memory Size: 4 Megabits (512 Kilobytes)
• Organization: 512K x 8 bits
• Erase/Program Cycle Endurance: 10,000 cycles
• Data Retention: 20 years

Detailed Pin Configuration

1. A16 - Address Input
2. A15 - Address Input
3. A12 - Address Input
4. A7 - Address Input
5. A6 - Address Input
6. A5 - Address Input
7. A4 - Address Input
8. A3 - Address Input
9. A2 - Address Input
10. A1 - Address Input
11. A0 - Address Input
12. VPP - Programming Voltage Supply
13. OE - Output Enable
14. CE - Chip Enable
15. WE - Write Enable
16. I/O0 - Data Input/Output
17. I/O1 - Data Input/Output
18. I/O2 - Data Input/Output
19. I/O3 - Data Input/Output
20. I/O4 - Data Input/Output
21. I/O5 - Data Input/Output
22. I/O6 - Data Input/Output
23. I/O7 - Data Input/Output
24. NC - No Connection
25. GND - Ground
26. A8 - Address Input
27. A9 - Address Input
28. A11 - Address Input
29. A10 - Address Input
30. VCC - Power Supply
31. A14 - Address Input
32. A13 - Address Input

Functional Features

• High-speed access: The AT27C040-70PU offers fast access times, allowing for efficient data retrieval.
• Easy integration: The chip can be easily integrated into existing electronic systems due to its standard pin configuration and compatibility with common interfaces.
• Reliable data storage: With non-volatile memory technology, the AT27C040-70PU ensures reliable storage of critical data or code.

Advantages and Disadvantages

Advantages

• Non-volatile storage: The stored data remains intact even during power loss.
• Fast access times: Allows for quick retrieval of data.
• Easy integration: Compatible with standard interfaces, making it easy to integrate into various electronic systems.

Disadvantages

• Limited reprogrammability: Once programmed, the data cannot be modified or erased, limiting flexibility in certain applications.
• Relatively small memory size: With a capacity of 4 Megabits, the AT27C040-70PU may not be suitable for applications requiring larger storage capacities.

Working Principles

The AT27C040-70PU operates based on the principle of electrical programming. The memory cells within the chip are programmed by applying specific voltage levels to the address and control pins while providing the desired data input. Once programmed, the stored data can be read by enabling the output pins.

Detailed Application Field Plans

The AT27C040-70PU finds application in various fields, including:

1. Embedded Systems: Used for storing firmware or boot code in microcontrollers and embedded systems.
2. Computer Systems: Employed for storing BIOS (Basic Input/Output System) code in computer motherboards.
3. Consumer Electronics: Utilized in devices such as gaming consoles, set-top boxes, and digital cameras for storing firmware or configuration data.

Detailed and Complete Alternative Models

1. AT27C080-90PU: A similar PROM chip with double the memory size (8 Megabits).
2. AT28C256-15PU: An EEPROM (Electrically Erasable Programmable Read-Only Memory) chip with a smaller memory size (