AT27C020-55PU

Product Overview

Category

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

Use

It is primarily used for storing data that needs to be permanently written and cannot be modified or erased.

Characteristics

• Non-volatile: The stored data remains intact even when power is turned off.
• High storage capacity: The AT27C020-55PU has a storage capacity of 2 megabits (256 kilobytes).
• Fast access time: It offers a fast access time of 55 nanoseconds.
• Low power consumption: The chip operates on low power, making it energy-efficient.

Package

The AT27C020-55PU comes in a plastic DIP (Dual In-line Package) with 32 pins.

Essence

The essence of AT27C020-55PU lies in its ability to provide non-volatile storage for critical data that requires permanent retention.

Packaging/Quantity

The chip is typically packaged in tubes or trays, with each tube containing multiple units. The exact quantity may vary depending on the supplier.

Specifications

• Storage Capacity: 2 Megabits (256 Kilobytes)
• Access Time: 55 Nanoseconds
• Supply Voltage: 5V ±10%
• Operating Temperature Range: -40°C to +85°C
• Input/Output Compatibility: TTL

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. NC
17. I/O0
18. I/O1
19. I/O2
20. I/O3
21. I/O4
22. I/O5
23. I/O6
24. I/O7
25. VCC
26. GND
27. NC
28. NC
29. NC
30. NC
31. NC
32. NC

Functional Features

• Non-volatile storage: The AT27C020-55PU retains data even when power is disconnected.
• Fast access time: With an access time of 55 nanoseconds, it allows for quick retrieval of stored information.
• Easy integration: The chip can be easily integrated into various electronic systems due to its standard pin configuration.
• Low power consumption: It operates on low power, making it suitable for battery-powered devices.

Advantages and Disadvantages

Advantages

• Permanent data storage
• Fast access time
• Easy integration into electronic systems
• Low power consumption

Disadvantages

• Inability to modify or erase stored data
• Limited storage capacity compared to other memory technologies

Working Principles

The AT27C020-55PU utilizes a technology known as electrically programmable read-only memory (EPROM). It stores data by using electrical charges to trap electrons in specific memory cells. Once programmed, the data remains intact until the chip is replaced.

Detailed Application Field Plans

The AT27C020-55PU finds applications in various fields, including: 1. Embedded systems 2. Automotive electronics 3. Industrial control systems 4. Medical devices 5. Consumer electronics

Detailed and Complete Alternative Models

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

These alternative models offer different storage capacities and access times to cater to specific requirements.

In conclusion, the AT27C020-55PU is a programmable read-only memory chip that provides non-volatile storage for critical data. With its fast access time and low power consumption, it finds applications in various fields. While it has limitations in terms of data modification and storage capacity, alternative models are available to suit different needs.