AT27C020-90TU

Product Overview

Category

AT27C020-90TU 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 removed.
• Programmable: The memory can be written to only once during the manufacturing process.
• High capacity: The AT27C020-90TU has a storage capacity of 2 megabits (256 kilobytes).
• Fast access time: The chip operates at a speed of 90 nanoseconds.

Package

The AT27C020-90TU is available in a standard 32-pin plastic dual in-line package (PDIP).

Essence

The essence of this product lies in its ability to provide permanent, non-volatile storage for electronic devices.

Packaging/Quantity

The AT27C020-90TU is typically packaged in reels or tubes and is available in quantities suitable for both small-scale and large-scale production.

Specifications

• Storage Capacity: 2 Megabits (256 Kilobytes)
• Access Time: 90 Nanoseconds
• Supply Voltage: 5V
• Operating Temperature Range: -40°C to +85°C
• Package Type: 32-pin PDIP

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. Q0
16. Q1
17. Q2
18. Q3
19. Q4
20. Q5
21. Q6
22. Q7
23. VCC (Supply Voltage)
24. A8
25. A9
26. A11
27. A10
28. /CE (Chip Enable)
29. NC (No Connection)
30. NC (No Connection)
31. NC (No Connection)
32. NC (No Connection)

Functional Features

• High-speed access: The AT27C020-90TU offers fast access times, allowing for efficient data retrieval.
• Low power consumption: This chip is designed to minimize power usage, making it suitable for battery-powered devices.
• Reliable data retention: The non-volatile nature of the memory ensures that stored data remains intact over long periods.
• Easy integration: The standard pin configuration and package make it compatible with various electronic systems.

Advantages and Disadvantages

Advantages

• Non-volatile storage ensures data integrity.
• Fast access time allows for quick data retrieval.
• Low power consumption prolongs battery life.
• Easy integration into existing electronic systems.

Disadvantages

• The memory can only be programmed once, limiting its flexibility for future updates.
• Limited storage capacity compared to other memory technologies.

Working Principles

The AT27C020-90TU 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. Once programmed, the data remains unchanged until the next programming cycle.

Detailed Application Field Plans

The AT27C020-90TU finds applications in various electronic devices, including but not limited to: - Embedded systems - Automotive electronics - Industrial control systems - Consumer electronics - Medical devices

Detailed and Complete Alternative Models

1. AT27C010-90TU: 1 Megabit (128 Kilobytes) capacity, 90 nanoseconds access time.
2. AT27C040-90TU: 4 Megabit (512 Kilobytes) capacity, 90 nanoseconds access time.
3. AT27C080-90TU: 8 Megabit (1 Megabyte) capacity, 90 nanoseconds access time.

These alternative models offer different storage capacities while maintaining the same access time and package type as the AT27C020-90TU.

In conclusion, the AT27C020-90TU is a programmable read-only memory chip that provides non-volatile storage for electronic devices. With its high-speed access, low power consumption, and reliable data retention, it is suitable for various applications in embedded systems, automotive electronics, industrial control systems, consumer electronics, and medical devices. While it has limitations such as one-time programmability and limited storage capacity, alternative models with varying capacities are available to suit different requirements.