AT27C020-70JI

Product Overview

Category: Integrated Circuit (IC)

Use: The AT27C020-70JI is a programmable read-only memory (PROM) IC. It is commonly used for storing non-volatile data in electronic systems.

Characteristics: - Non-volatile: Retains stored data even when power is turned off. - High storage capacity: The AT27C020-70JI has a capacity of 2 megabits (256 kilobytes). - Fast access time: The access time is 70 nanoseconds, allowing for quick retrieval of data. - Low power consumption: The IC operates at low power levels, making it suitable for battery-powered devices.

Package: The AT27C020-70JI is available in a 32-pin plastic J-lead chip carrier package.

Essence: The essence of the AT27C020-70JI is its ability to store and retrieve data reliably in various electronic applications.

Packaging/Quantity: The IC is typically sold in reels or tubes, with quantities varying based on customer requirements.

Specifications

• Memory Capacity: 2 megabits (256 kilobytes)
• Access Time: 70 nanoseconds
• Supply Voltage: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Package Type: 32-pin plastic J-lead chip carrier

Pin Configuration

The AT27C020-70JI has a total of 32 pins. The pin configuration is as follows:

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. A8
14. A9
15. A11
16. A10
17. OE#
18. CE#
19. WE#
20. I/O0
21. I/O1
22. I/O2
23. I/O3
24. I/O4
25. I/O5
26. I/O6
27. I/O7
28. VCC
29. GND
30. NC
31. NC
32. NC

Functional Features

• Programmability: The AT27C020-70JI can be programmed using a suitable programming device, allowing users to store custom data.
• Read Operation: The IC supports fast and reliable read operations, enabling efficient retrieval of stored data.
• Non-volatile Storage: The stored data remains intact even when power is disconnected, ensuring data persistence.
• Low Power Consumption: The IC operates at low power levels, making it energy-efficient and suitable for battery-powered devices.

Advantages and Disadvantages

Advantages: - High storage capacity - Fast access time - Non-volatile memory - Low power consumption

Disadvantages: - Limited rewrite capability (PROM) - Requires external programming device for initial data storage

Working Principles

The AT27C020-70JI utilizes a technology called electrically programmable read-only memory (EPROM). It consists of a grid of memory cells that can be individually programmed or erased. During programming, electrical charges are applied to specific memory cells, altering their state to represent the desired data. Once programmed, the data can be read from the memory cells by applying appropriate voltage levels to the IC's pins.

Application Field Plans

The AT27C020-70JI finds applications in various electronic systems, including but not limited to: - Embedded systems - Consumer electronics - Automotive electronics - Industrial control systems

Alternative Models

1. AT27C010-70JI: 1 megabit (128 kilobytes) capacity, similar specifications.
2. AT27C040-70JI: 4 megabit (512 kilobytes) capacity, similar specifications.
3. AT27C080-70JI: 8 megabit (1 megabyte) capacity, similar specifications.

These alternative models offer different storage capacities while maintaining similar characteristics and pin configurations to the AT27C020-70JI.

In conclusion, the AT27C020-70JI is a programmable read-only memory IC with a high storage capacity, fast access time, and low power consumption. It finds applications in various electronic systems and has alternative models available with different storage capacities.