AT27C040-90JU

Product Overview

Category

AT27C040-90JU belongs to the category of programmable read-only memory (PROM) chips.

Use

This product is commonly used in electronic devices for storing permanent data that cannot be modified or erased. It is widely utilized in various applications such as microcontrollers, embedded systems, and consumer electronics.

Characteristics

• Non-volatile: The stored data remains intact even when power is turned off.
• High storage capacity: The AT27C040-90JU has a capacity of 4 megabits (512 kilobytes).
• Fast access time: With an access time of 90 nanoseconds, it provides quick retrieval of data.
• Low power consumption: This chip operates on low power, making it suitable for battery-powered devices.

Package

The AT27C040-90JU is available in a 32-pin plastic J-lead chip carrier (PLCC) package.

Essence

The essence of this product lies in its ability to store large amounts of data permanently, ensuring reliable and secure information storage.

Packaging/Quantity

The AT27C040-90JU is typically packaged in reels containing multiple units. The exact quantity per reel may vary depending on the manufacturer's specifications.

Specifications

• Memory Capacity: 4 Megabits (512 Kilobytes)
• Access Time: 90 Nanoseconds
• Supply Voltage: 5V ±10%
• Operating Temperature Range: -40°C to +85°C
• Package Type: PLCC-32

Detailed Pin Configuration

1. A16
2. A15
3. A12
4. A7
5. A6
6. A5
7. A4
8. A3
9. A2
10. A1
11. A0
12. /OE (Output Enable)
13. /CE (Chip Enable)
14. VSS (Ground)
15. DQ0
16. DQ1
17. DQ2
18. DQ3
19. DQ4
20. DQ5
21. DQ6
22. DQ7
23. VCC (+5V Power Supply)
24. /WE (Write Enable)
25. /PGM (Program Enable)
26. /BYTE (Byte Mode Select)
27. NC (No Connection)
28. NC
29. NC
30. NC
31. NC
32. NC

Functional Features

• High-speed data access: The AT27C040-90JU offers fast read access, allowing for efficient retrieval of stored information.
• Easy integration: This PROM chip can be easily integrated into existing electronic systems due to its standard pin configuration and compatibility with common interfaces.
• Reliable data retention: The non-volatile nature of the AT27C040-90JU ensures that the stored data remains intact over extended periods without the need for power supply.

Advantages and Disadvantages

Advantages

• Large storage capacity
• Fast access time
• Low power consumption
• Easy integration into existing systems
• Reliable data retention

Disadvantages

• Data cannot be modified or erased once programmed
• Limited flexibility compared to other memory types

Working Principles

The AT27C040-90JU operates based on the principle of electrical programming. During the manufacturing process, the desired data is programmed into the memory cells using high voltage signals. Once programmed, the data remains permanently stored in the memory cells until the chip is replaced.

Detailed Application Field Plans

The AT27C040-90JU finds applications in various fields, including:

1. Microcontrollers: Used for storing firmware and program code in microcontroller-based systems.
2. Embedded Systems: Utilized for permanent data storage in embedded systems, such as industrial control systems and automotive electronics.
3. Consumer Electronics: Integrated into devices like gaming consoles, set-top boxes, and digital cameras to store system software and configuration data.

Detailed and Complete Alternative Models

1. AT27C080-90JU: A similar PROM chip with double the capacity (8 Megabits).
2. AT27C020-70JU: A lower capacity PROM chip (2 Megabits) with a slower access time (70 nanoseconds).
3. AT27C256R-45JU: A smaller capacity PROM chip (256 Kilobits) with a faster access time (45 nanoseconds).

These alternative models provide options with varying capacities, access times, and package types to suit different application requirements.

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