AT27C020-70TI

Product Overview

Category

AT27C020-70TI belongs to the category of programmable read-only memory (PROM) chips.

Use

This product is commonly used for storing permanent data that needs to be retained even when power is turned off. It is widely utilized in various electronic devices such as computers, microcontrollers, and consumer electronics.

Characteristics

• Non-volatile: The stored data remains intact even without power supply.
• Programmable: The memory can be programmed with specific data.
• Read-only: Once programmed, the data cannot be modified or erased.
• High capacity: The AT27C020-70TI has a storage capacity of 2 megabits (256 kilobytes).

Package

The AT27C020-70TI is available in a 32-pin plastic dual in-line package (PDIP). This package provides mechanical protection and facilitates easy integration into circuit boards.

Essence

The essence of AT27C020-70TI lies in its ability to store large amounts of data permanently, making it ideal for applications requiring non-volatile memory.

Packaging/Quantity

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

Specifications

• Operating Voltage: 5V
• Access Time: 70 nanoseconds
• Organization: 256K x 8 bits
• Erase Time: Not applicable (read-only memory)
• Data Retention: Minimum 10 years
• Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The AT27C020-70TI features a 32-pin configuration. Here is a detailed pinout:

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. D0
18. D1
19. D2
20. D3
21. D4
22. D5
23. D6
24. D7
25. VCC
26. GND
27. NC
28. NC
29. NC
30. NC
31. NC
32. NC

Functional Features

• High-speed access: The AT27C020-70TI 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.
• Easy integration: The 32-pin package and standard pin configuration simplify the integration of this memory chip into various electronic systems.

Advantages and Disadvantages

Advantages

• Non-volatile storage ensures data retention even during power loss.
• Large storage capacity enables the storage of significant amounts of permanent data.
• Fast access times facilitate quick retrieval of stored information.
• Low power consumption makes it suitable for energy-efficient applications.

Disadvantages

• Inability to modify or erase programmed data limits flexibility.
• Limited compatibility with certain applications that require rewritable memory.

Working Principles

The AT27C020-70TI operates based on the principle of electrical charge trapping in a floating gate structure. During programming, an electrical charge is applied to specific memory cells, altering their threshold voltage and storing data. Once programmed, the data remains fixed and can only be read.

Detailed Application Field Plans

The AT27C020-70TI finds applications in various fields, including: 1. Embedded systems: Used for firmware storage in microcontrollers and other embedded devices. 2. Computer systems: Employed for storing BIOS (Basic Input/Output System) code in personal computers. 3. Consumer electronics: Utilized in devices such as gaming consoles, set-top boxes, and digital cameras for permanent data storage.

Detailed and Complete Alternative Models

1. AT27C010-70TI: A similar PROM chip with half the storage capacity (1 megabit).
2. AT27C040-70TI: Offers four times the storage capacity (4 megabits) compared to AT27C020-70TI.
3. AT27C080-70TI: Provides double the storage capacity (8 megabits) of AT27C020-70TI.

These alternative models offer different storage capacities to suit specific application requirements.

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