AT27C020-55JU-T

Product Overview

Category

AT27C020-55JU-T belongs to the category of programmable read-only memory (PROM) chips.

Use

This product is commonly used in electronic devices for storing non-volatile data that needs to be permanently programmed during manufacturing.

Characteristics

• Non-volatile: The stored data remains intact even when power is turned off.
• Programmable: The memory can be electrically programmed with desired data.
• Read-only: Once programmed, the data cannot be modified or erased.

Package

AT27C020-55JU-T is available in a 32-pin PLCC (Plastic Leaded Chip Carrier) package.

Essence

The essence of AT27C020-55JU-T lies in its ability to provide reliable and permanent storage of data in electronic devices.

Packaging/Quantity

This product is typically packaged in reels containing a specified quantity of chips, such as 1000 units per reel.

Specifications

• Memory Capacity: 2 Megabits (256 Kilobytes)
• Operating Voltage: 5V
• Access Time: 55 nanoseconds
• Operating Temperature Range: -40°C to +85°C
• Data Retention: 20 years

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. /WE (Write Enable)
14. VSS (Ground)
15. NC (No Connection)
16. Q0
17. Q1
18. Q2
19. Q3
20. Q4
21. Q5
22. Q6
23. Q7
24. VCC (Power Supply)
25. A14
26. A13
27. A8
28. A9
29. A11
30. A10
31. /CE (Chip Enable)
32. /PGM (Program)

Functional Features

• High-speed access: The 55 nanosecond access time ensures quick retrieval of data.
• Low power consumption: AT27C020-55JU-T operates efficiently with low power requirements.
• Easy integration: The chip can be easily integrated into various electronic devices due to its standard pin configuration.
• Reliable data retention: The stored data remains intact for up to 20 years, ensuring long-term reliability.

Advantages and Disadvantages

Advantages

• Non-volatile memory ensures data persistence even during power loss.
• Easy programmability allows for efficient customization of data.
• High-speed access enables quick retrieval of information.

Disadvantages

• Once programmed, the data cannot be modified or erased, limiting flexibility.
• Limited storage capacity compared to other memory technologies.

Working Principles

AT27C020-55JU-T utilizes a floating-gate transistor technology to store data. During programming, electrical charges are trapped in the floating gate, altering the transistor's behavior and storing the desired data. When reading, the transistor's behavior is determined by the presence or absence of charge in the floating gate, allowing the retrieval of stored data.

Detailed Application Field Plans

AT27C020-55JU-T finds applications in various electronic devices requiring permanent storage of data, such as: - Embedded systems - Automotive electronics - Industrial control systems - Medical equipment - Consumer electronics

Detailed and Complete Alternative Models

1. AT27C010-45PU: 1 Megabit PROM chip with a 45 nanosecond access time.
2. AT27C040-70PU: 4 Megabit PROM chip with a 70 nanosecond access time.
3. AT27C080-90PU: 8 Megabit PROM chip with a 90 nanosecond access time.
4. AT27C256R-45PU: 256 Kilobit PROM chip with a 45 nanosecond access time.

These alternative models offer different memory capacities and access times to suit specific application requirements.

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