AT27LV040A-90TU

Product Overview

Category

AT27LV040A-90TU belongs to the category of programmable read-only memory (PROM) chips.

Use

This product is primarily used for storing data that needs to be permanently stored and cannot be modified. It is commonly used in various electronic devices such as computers, consumer electronics, and automotive applications.

Characteristics

• Non-volatile: The data stored in AT27LV040A-90TU 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: AT27LV040A-90TU operates on low power, making it suitable for battery-powered devices.
• Reliable: It offers high reliability and durability, ensuring data integrity over an extended period.

Package

AT27LV040A-90TU is available in a standard 32-pin Thin Small Outline Package (TSOP).

Essence

The essence of AT27LV040A-90TU lies in its ability to provide non-volatile storage with fast access times, making it ideal for applications requiring permanent data storage.

Packaging/Quantity

This product is typically packaged in reels or tubes, with each containing a specific quantity of chips. The exact packaging and quantity may vary depending on the manufacturer's specifications.

Specifications

• Storage Capacity: 4 Megabits (512 Kilobytes)
• Access Time: 90 Nanoseconds
• Supply Voltage: 2.7V - 5.5V
• Operating Temperature Range: -40°C to +85°C
• Pin Count: 32

Detailed Pin Configuration

1. A16
2. A15
3. A14
4. A13
5. A12
6. A7
7. A6
8. A5
9. A4
10. A3
11. A2
12. A1
13. A0
14. VSS (Ground)
15. DQ0
16. DQ1
17. DQ2
18. DQ3
19. DQ4
20. DQ5
21. DQ6
22. DQ7
23. CE (Chip Enable)
24. OE (Output Enable)
25. WE (Write Enable)
26. NC (No Connection)
27. NC
28. VCC (Power Supply)
29. RESET
30. BYTE
31. WP (Write Protect)
32. NC

Functional Features

• Chip Enable (CE): Activates the chip for read or write operations.
• Output Enable (OE): Enables the output buffers, allowing data to be read from the chip.
• Write Enable (WE): Enables write operations to the chip.
• Reset (RESET): Resets the chip to its initial state.
• Byte (BYTE): Selects byte-wide or word-wide operation.
• Write Protect (WP): Provides write protection to prevent accidental modification of stored data.

Advantages and Disadvantages

Advantages

• Non-volatile storage ensures data integrity even during power loss.
• Fast access time allows for quick retrieval of data.
• Low power consumption makes it suitable for battery-powered devices.
• High reliability and durability ensure long-term data retention.

Disadvantages

• Limited storage capacity compared to other memory technologies.
• Inability to modify stored data once programmed.

Working Principles

AT27LV040A-90TU utilizes a technology called electrically programmable read-only memory (EPROM). It consists of a grid of memory cells that can be programmed with data using electrical signals. Once programmed, the data remains stored in the memory cells until it is erased or overwritten.

Detailed Application Field Plans

AT27LV040A-90TU finds applications in various fields, including: 1. Computer systems: Used for storing firmware, BIOS, and other critical system data. 2. Consumer electronics: Employed in devices like digital cameras, printers, and set-top boxes for storing configuration settings and firmware. 3. Automotive industry: Utilized in automotive electronic control units (ECUs) for storing calibration data, firmware, and diagnostic information.

Detailed and Complete Alternative Models

1. AT27C010-70PU: 1 Megabit (128 Kilobytes) EPROM chip with a slower access time of 70 nanoseconds.
2. AT28C64B-15PU: 64 Kilobit (8 Kilobytes) EEPROM chip with a faster access time of 15 nanoseconds.
3. AT29C040A-12TC: 4 Megabit (512 Kilobytes) Flash memory chip with an access time of 12 nanoseconds.

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