AT27C040-70PI

Product Overview

Category

AT27C040-70PI belongs to the category of programmable read-only memory (PROM) chips.

Use

It is primarily used for storing data that needs to be permanently written and cannot be modified or erased.

Characteristics

• Non-volatile: The stored data remains intact even when power is turned off.
• High density: It can store a large amount of data in a compact chip.
• Fast access time: Allows for quick retrieval of data.
• Low power consumption: Operates efficiently with minimal power requirements.

Package

AT27C040-70PI is available in a 32-pin DIP (Dual In-line Package) format.

Essence

The essence of AT27C040-70PI lies in its ability to provide reliable and non-volatile storage for critical data.

Packaging/Quantity

It is typically packaged in tubes or trays, with each tube or tray containing a specific quantity of chips. The exact packaging and quantity may vary depending on the manufacturer.

Specifications

• Operating voltage: 5V
• Access time: 70ns
• Memory capacity: 4 Megabits (512 Kilobytes)
• Organization: 512K x 8 bits
• Programming voltage: 12.75V
• Erase voltage: 25V
• Temperature range: -40°C to +85°C

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

Functional Features

• Easy programming: The chip can be programmed using standard PROM programming equipment.
• High reliability: AT27C040-70PI offers excellent data retention and endurance characteristics.
• Compatibility: It is compatible with a wide range of microcontrollers and other digital devices.
• Security: The chip features a write protection mechanism to prevent accidental modification or erasure of stored data.

Advantages and Disadvantages

Advantages

• Non-volatile storage ensures data integrity.
• Fast access time allows for quick retrieval of information.
• High-density memory capacity provides ample storage space.
• Low power consumption makes it suitable for battery-powered devices.

Disadvantages

• Once programmed, the data cannot be modified or erased.
• Limited storage capacity compared to other memory technologies.
• Relatively higher cost per bit compared to some alternative memory options.

Working Principles

AT27C040-70PI utilizes a floating gate transistor technology to store data. The data is written to the memory cells by applying a high voltage to the programming pin (VPP) while enabling the write enable (WE#) signal. Once programmed, the data remains stored in the memory cells until explicitly erased using the erase voltage (25V) applied to the chip's erase pin (CE#).

Detailed Application Field Plans

AT27C040-70PI finds applications in various fields, including: 1. Embedded systems 2. Automotive electronics 3. Industrial control systems 4. Medical devices 5. Communication equipment

Detailed and Complete Alternative Models

1. AT27C080-90PU: 8 Megabit (1 Megabyte) PROM chip with a faster access time of 90ns.
2. AT28C256-15PU: 256 Kilobit (32 Kilobyte) EEPROM chip with electrically erasable and programmable capabilities.
3. AM29F040B-90JC: 4 Megabit (512 Kilobytes) flash memory chip with a faster access time of 90ns.

These alternative models offer similar functionality and can be considered as substitutes for AT27C040-70PI in specific applications.

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