AT27C040-90JC

Product Overview

Category

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

Use

This chip is primarily used for storing data that needs to be permanently stored and cannot be modified. It is commonly used in applications where non-volatile memory is required.

Characteristics

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

Package

AT27C040-90JC is available in a 32-pin PLCC (Plastic Leaded Chip Carrier) package.

Essence

The essence of AT27C040-90JC lies in its ability to store large amounts of data reliably and securely, without the risk of accidental modification or loss.

Packaging/Quantity

This chip is typically sold in reels or tubes, with each reel or tube containing a specific quantity of AT27C040-90JC chips. The exact packaging and quantity may vary depending on the supplier.

Specifications

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

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. VPP
13. OE#
14. CE#
15. WE#
16. I/O0
17. I/O1
18. I/O2
19. I/O3
20. I/O4
21. I/O5
22. I/O6
23. I/O7
24. VCC
25. GND
26. NC
27. NC
28. NC
29. NC
30. NC
31. NC
32. NC

Functional Features

• Easy programming: AT27C040-90JC can be programmed using standard PROM programming equipment.
• High reliability: The stored data is resistant to accidental erasure or modification, ensuring the integrity of the information.
• Fast access time: With a quick access time of 90 nanoseconds, the chip allows for efficient retrieval of data.

Advantages and Disadvantages

Advantages

• Non-volatile memory ensures data retention even during power loss.
• Large storage capacity suitable for storing significant amounts of data.
• Low power consumption makes it ideal for battery-powered devices.
• Fast access time enables quick retrieval of stored data.

Disadvantages

• Data cannot be modified once programmed, limiting its flexibility compared to other types of memory.
• Limited endurance: The number of times the chip can be reprogrammed is finite.

Working Principles

AT27C040-90JC operates based on the principle of electrical charge trapping in floating gate transistors. During programming, a high voltage is applied to the control gate, allowing electrons to tunnel through a thin oxide layer onto the floating gate. This trapped charge alters the transistor's threshold voltage, representing a logical "1" or "0". During read operations, the stored charge is sensed, providing the desired data output.

Detailed Application Field Plans

AT27C040-90JC finds applications in various fields, including: 1. Embedded systems: Used for firmware storage in microcontrollers and other embedded devices. 2. Automotive electronics: Employed for storing critical data such as calibration tables and configuration settings. 3. Industrial control systems: Utilized for storing program code and configuration data in industrial automation equipment. 4. Consumer electronics: Found in devices like gaming consoles, set-top boxes, and digital cameras for storing firmware and data.

Detailed and Complete Alternative Models

Some alternative models to AT27C040-90JC include: - AT27C080-90JC: An 8-megabit version of the same PROM chip. - AT28C010-12PC: A 1-megabit electrically erasable programmable read-only memory (EEPROM) chip. - AM29F040B-90JC: A 4-megabit flash memory chip with similar characteristics.

These alternative models offer different features and capabilities, allowing users to choose the most suitable option based on their specific requirements.

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