AT27C040-12JI

Product Overview

Category

AT27C040-12JI belongs to the category of programmable read-only memory (PROM) chips.

Use

This product is commonly used for storing permanent data or program code that cannot be modified once programmed.

Characteristics

• Non-volatile: The stored data remains intact even when power is removed.
• High storage capacity: The AT27C040-12JI has a capacity of 4 megabits (512 kilobytes).
• Fast access time: The chip operates at a speed of 120 nanoseconds.
• Low power consumption: It requires minimal power to operate efficiently.

Package

The AT27C040-12JI is available in a 32-pin plastic package, which provides protection and easy integration into electronic circuits.

Essence

The essence of this product lies in its ability to store large amounts of data reliably and securely.

Packaging/Quantity

The AT27C040-12JI is typically packaged in reels or tubes, with each containing a specific quantity of chips. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Memory Capacity: 4 megabits (512 kilobytes)
• Access Time: 120 nanoseconds
• Supply Voltage: 5V
• Operating Temperature Range: -40°C to +85°C
• Package Type: 32-pin plastic package

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. NC (No Connection)
16. Q7
17. Q6
18. Q5
19. Q4
20. Q3
21. Q2
22. Q1
23. Q0
24. VSS (Ground)
25. A14
26. A13
27. A8
28. A9
29. A11
30. A10
31. OE (Output Enable)
32. WE (Write Enable)

Functional Features

• Easy integration: The AT27C040-12JI can be easily connected to microcontrollers or other electronic devices.
• High reliability: The stored data is resistant to accidental erasure or modification.
• Fast access time: The chip allows for quick retrieval of data.

Advantages and Disadvantages

Advantages

• Non-volatile memory ensures data integrity.
• Large storage capacity.
• Low power consumption.
• Fast access time.

Disadvantages

• Inability to modify stored data once programmed.
• Limited write endurance compared to other memory technologies.

Working Principles

The AT27C040-12JI operates based on the principle of electrical charge trapping. During programming, a high voltage is applied to specific memory cells, causing electrons to become trapped in the floating gate. These trapped charges represent the stored data. When reading, the presence or absence of trapped charges is detected, allowing the retrieval of the stored information.

Detailed Application Field Plans

The AT27C040-12JI finds applications in various fields, including: 1. Embedded systems: Used for storing firmware or boot code in microcontrollers. 2. Automotive electronics: Stores critical data such as calibration tables or configuration settings. 3. Industrial control systems: Provides non-volatile memory for storing program instructions or data logs. 4. Consumer electronics: Used in devices like gaming consoles or set-top boxes for storing system software.

Detailed and Complete Alternative Models

1. AT27C080-15PU: 8 megabit (1 megabyte) capacity, 150 nanoseconds access time.
2. AT27LV010A-12JC: 1 megabit (128 kilobytes) capacity, 120 nanoseconds access time.
3. AT27BV020-20VC: 2 megabit (256 kilobytes) capacity, 200 nanoseconds access time.

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

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