AT27C2048-90JI

Product Overview

Category

AT27C2048-90JI belongs to the category of programmable read-only memory (PROM) chips.

Use

This product is commonly used in electronic devices for storing permanent data that cannot be modified or erased. It provides non-volatile storage capabilities, making it ideal for applications where data integrity is crucial.

Characteristics

• Non-volatile: The stored data remains intact even when power is removed.
• High capacity: The AT27C2048-90JI has a capacity of 2,048 kilobits (256 kilobytes).
• Fast access time: With a speed rating of 90 nanoseconds, it ensures quick retrieval of data.
• Low power consumption: Designed to operate efficiently with minimal power requirements.

Package

The AT27C2048-90JI comes in a standard 32-pin plastic dual in-line package (PDIP). This package offers easy integration into various electronic circuits and systems.

Essence

The essence of AT27C2048-90JI lies in its ability to provide reliable and secure storage of data that remains unalterable throughout the lifetime of the device.

Packaging/Quantity

This product is typically packaged in tubes or trays, with each containing a specific quantity of chips. The exact packaging and quantity may vary depending on the manufacturer's specifications.

Specifications

• Capacity: 2,048 kilobits (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. E (Chip Enable)
13. G (Output Enable)
14. Vcc (+5V Power Supply)
15. Q7
16. Q6
17. Q5
18. Q4
19. Q3
20. Q2
21. Q1
22. Q0
23. CE (Program Enable)
24. OE (Output Enable)
25. WE (Write Enable)
26. NC (No Connection)
27. NC
28. NC
29. NC
30. NC
31. NC
32. GND (Ground)

Functional Features

• Read-only memory: The AT27C2048-90JI is designed for read-only operations, ensuring data integrity.
• High-speed access: With a fast access time of 90 nanoseconds, it enables quick retrieval of stored data.
• Low power consumption: This chip operates efficiently with low power requirements, making it suitable for battery-powered devices.
• Reliable storage: The non-volatile nature of the PROM ensures that data remains intact even during power loss or device shutdown.

Advantages and Disadvantages

Advantages

• Non-volatile storage ensures data integrity.
• High capacity allows for storing large amounts of permanent data.
• Fast access time enables quick retrieval of information.
• Low power consumption prolongs battery life in portable devices.

Disadvantages

• Inability to modify or erase stored data limits flexibility.
• Limited write cycles compared to other memory technologies.
• Relatively higher cost per bit compared to other memory options.

Working Principles

The AT27C2048-90JI operates based on the principle of electrical charge trapping. During programming, the memory cells are selectively charged or uncharged to represent binary data. Once programmed, the stored data remains fixed until the chip is replaced.

Detailed Application Field Plans

The AT27C2048-90JI finds applications in various fields, including: 1. Embedded systems: Used for firmware storage in microcontrollers and other embedded devices. 2. Automotive electronics: Employed for storing critical data such as calibration parameters and configuration settings. 3. Medical devices: Utilized for storing patient data, device configurations, and firmware updates. 4. Industrial control systems: Used for storing program code and configuration data in PLCs and other industrial automation equipment.

Detailed and Complete Alternative Models

1. AT27C010-70PU: 1-megabit (128-kilobyte) PROM with a speed rating of 70 nanoseconds.
2. AT27LV010A-12JC: 1-megabit low-voltage PROM with a speed rating of 120 nanoseconds.
3. AT28C64B-15PU: 64-kilobit (8-kilobyte) EEPROM with a speed rating of 150 nanoseconds.

These alternative models offer different capacities, access times, and memory technologies to suit specific application requirements.

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