AT27C040-90JU-T

Product Overview

Category

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

Use

This product is commonly used for storing permanent data or program code that cannot be modified once programmed.

Characteristics

• Non-volatile memory: The stored data remains intact even when power is removed.
• High storage capacity: The AT27C040-90JU-T has a capacity of 4 megabits (512 kilobytes).
• Fast access time: It operates at a speed of 90 nanoseconds, allowing for quick retrieval of data.
• Low power consumption: The chip is designed to consume minimal power during operation.
• Durable: The AT27C040-90JU-T is resistant to environmental factors such as temperature and humidity.

Package

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

Essence

The essence of this product lies in its ability to provide non-volatile storage for critical data or program code in various electronic devices.

Packaging/Quantity

The AT27C040-90JU-T is typically packaged in reels or tubes, with each reel or tube containing a specific quantity of chips. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Memory 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

The AT27C040-90JU-T has a total of 32 pins, which are assigned specific functions. The pin configuration is as follows:

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. NC
25. GND
26. VCC
27. A14
28. A13
29. A8
30. A9
31. A11
32. A10

Functional Features

• Easy programming: The AT27C040-90JU-T can be programmed using standard PROM programming equipment.
• High reliability: The stored data is resistant to accidental erasure or modification.
• Efficient data retrieval: The fast access time ensures quick retrieval of data from the memory chip.
• Low power consumption: The chip operates at low power, making it suitable for battery-powered devices.

Advantages and Disadvantages

Advantages

• Non-volatile storage ensures data integrity.
• High storage capacity allows for storing large amounts of data or program code.
• Fast access time enables quick data retrieval.
• Low power consumption prolongs battery life in portable devices.

Disadvantages

• Inability to modify or update stored data once programmed.
• Limited storage capacity compared to other memory technologies.
• Relatively higher cost per unit compared to some alternative memory options.

Working Principles

The AT27C040-90JU-T utilizes a technology called electrically programmable read-only memory (EPROM). It consists of a grid of memory cells that can be individually programmed with binary data. The programming process involves applying specific voltage levels to the control pins of the chip, which alters the state of the memory cells. Once programmed, the data remains stored in the memory until it is erased or overwritten.

Detailed Application Field Plans

The AT27C040-90JU-T finds applications in various electronic devices that require non-volatile storage for critical data or program code. Some common application fields include:

1. Embedded Systems: The chip can be used in microcontrollers and other embedded systems to store firmware or boot code.
2. Automotive Electronics: It can be employed in automotive applications such as engine control units (ECUs) or infotainment systems.
3. Industrial Control Systems: The AT27C040-90JU-T is suitable for storing configuration data or program code in industrial control systems.
4. Medical Devices: It can be utilized in medical devices for storing patient data or firmware.
5. Consumer Electronics: The chip can be found in devices like gaming consoles, set-top boxes, or digital cameras for storing system software or firmware.

Detailed and Complete Alternative Models

1. AT28C64B-15PU