AT27C020-70PI

Product Overview

Category: Integrated Circuit (IC)

Use: The AT27C020-70PI is a programmable read-only memory (PROM) IC. It is commonly used for storing fixed data or program code that needs to be non-volatile and cannot be modified.

Characteristics: - Non-volatile memory - 2-megabit capacity - High-speed operation - Low power consumption - Durable and reliable

Package: The AT27C020-70PI is available in a 32-pin plastic dual in-line package (PDIP). This package provides easy integration into various electronic circuits and systems.

Essence: The essence of the AT27C020-70PI is its ability to store large amounts of data permanently, making it ideal for applications where data integrity and non-volatility are crucial.

Packaging/Quantity: The AT27C020-70PI is typically packaged in tubes or trays, with each tube or tray containing a specific quantity of ICs. The exact packaging and quantity may vary depending on the manufacturer or supplier.

Specifications

• Memory Capacity: 2 megabits (256 kilobytes)
• Operating Voltage: 5V
• Access Time: 70 nanoseconds
• Input/Output Configuration: 32-bit
• Erase/Program Cycle Endurance: 10,000 cycles
• Data Retention: 20 years

Pin Configuration

The AT27C020-70PI has a total of 32 pins, each serving a specific function. The pin configuration is as follows:

1. A16 - Address Input
2. A15 - Address Input
3. A12 - Address Input
4. A7 - Address Input
5. A6 - Address Input
6. A5 - Address Input
7. A4 - Address Input
8. A3 - Address Input
9. A2 - Address Input
10. A1 - Address Input
11. A0 - Address Input
12. VPP - Programming Voltage Input
13. OE - Output Enable
14. CE - Chip Enable
15. WE - Write Enable
16. I/O0 - Data Input/Output
17. I/O1 - Data Input/Output
18. I/O2 - Data Input/Output
19. I/O3 - Data Input/Output
20. I/O4 - Data Input/Output
21. I/O5 - Data Input/Output
22. I/O6 - Data Input/Output
23. I/O7 - Data Input/Output
24. VCC - Power Supply
25. GND - Ground
26. NC - No Connection
27. NC - No Connection
28. NC - No Connection
29. NC - No Connection
30. NC - No Connection
31. NC - No Connection
32. NC - No Connection

Functional Features

The AT27C020-70PI offers the following functional features:

• High-speed access: With an access time of 70 nanoseconds, it allows for quick retrieval of data.
• Non-volatile storage: The stored data remains intact even when power is removed, ensuring data integrity.
• Easy integration: The 32-pin PDIP package enables easy integration into various electronic circuits and systems.
• Low power consumption: It operates efficiently with low power requirements, making it suitable for battery-powered devices.

Advantages and Disadvantages

Advantages: - Large memory capacity - Non-volatile storage - High-speed operation - Durable and reliable

Disadvantages: - Limited erase/program cycle endurance (10,000 cycles) - Limited data retention period (20 years)

Working Principles

The AT27C020-70PI is based on the principle of electrically programmable read-only memory (EPROM). It utilizes a floating-gate transistor structure to store data. During programming, a high voltage is applied to the VPP pin, allowing electrons to be trapped in the floating gate. These trapped charges determine the stored data. The data can be read by enabling the chip (CE) and output enable (OE) pins.

Detailed Application Field Plans

The AT27C020-70PI finds applications in various fields where non-volatile storage of fixed data or program code is required. Some common application areas include:

1. Embedded Systems: Used for storing firmware or boot code in microcontrollers and microprocessors.
2. Automotive Electronics: Used for storing calibration data, configuration settings, or firmware in automotive control units.
3. Industrial Control Systems: Used for storing program code or configuration data in PLCs (Programmable Logic Controllers) and industrial automation systems.
4. Consumer Electronics: Used for storing firmware or fixed data in devices such as gaming consoles, set-top boxes, and home appliances.

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