AT27C040-70PC

Product Overview

Category

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

Use

This product is commonly used for storing permanent data that needs to be retained even when power is turned off. It is widely utilized in various electronic devices such as computers, gaming consoles, and automotive systems.

Characteristics

• Non-volatile: The stored data remains intact even without power supply.
• High storage capacity: The AT27C040-70PC has a capacity of 4 megabits (512 kilobytes).
• Fast access time: It offers a fast access time of 70 nanoseconds.
• Durable: This PROM chip can withstand multiple write and erase cycles without degradation.

Package

The AT27C040-70PC is available in a 32-pin plastic dual in-line package (PDIP). This package provides easy integration into circuit boards and ensures reliable connections.

Essence

The essence of AT27C040-70PC lies in its ability to store large amounts of data reliably and permanently.

Packaging/Quantity

This product is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier.

Specifications

• Memory Capacity: 4 megabits (512 kilobytes)
• Access Time: 70 nanoseconds
• Supply Voltage: 5 volts
• 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. A8
16. A9
17. A11
18. A10
19. DQ0 (Data Output 0)
20. DQ1 (Data Output 1)
21. DQ2 (Data Output 2)
22. DQ3 (Data Output 3)
23. DQ4 (Data Output 4)
24. DQ5 (Data Output 5)
25. DQ6 (Data Output 6)
26. DQ7 (Data Output 7)
27. CE (Chip Erase)
28. OE (Output Enable)
29. WE (Write Enable)
30. NC (No Connection)
31. GND (Ground)
32. A17

Functional Features

• Easy integration: The AT27C040-70PC can be easily integrated into existing electronic systems due to its standard pin configuration.
• High-speed access: With a fast access time of 70 nanoseconds, it ensures quick retrieval of stored data.
• Reliable data retention: The non-volatile nature of this PROM chip guarantees the long-term retention of stored data.
• Multiple write and erase cycles: It can withstand numerous write and erase cycles without compromising performance.

Advantages and Disadvantages

Advantages

• Large storage capacity
• Fast access time
• Non-volatile memory
• Durable and reliable

Disadvantages

• Limited rewrite capability
• Higher cost compared to other memory technologies

Working Principles

The AT27C040-70PC operates based on the principle of electrical charge trapping. Data is programmed into the memory cells by applying appropriate voltage levels to the control pins. Once programmed, the data remains stored in the memory even when power is removed. The stored data can be accessed by enabling the chip and providing the corresponding address.

Detailed Application Field Plans

The AT27C040-70PC finds applications in various fields, including: 1. Computer systems: Used for storing BIOS (Basic Input/Output System) firmware. 2. Gaming consoles: Stores game data and firmware. 3. Automotive systems: Utilized for storing critical data such as engine control parameters and firmware.

Detailed and Complete Alternative Models

1. AT27C080-90JC: 8 megabit (1 megabyte) PROM chip with a faster access time of 90 nanoseconds.
2. AT27C256R-45PU: 256 kilobit (32 kilobytes) PROM chip with a lower capacity but faster access time of 45 nanoseconds.
3. AT27LV010A-12JC: 1 megabit (128 kilobytes) low-voltage PROM chip with a slower access time of 120 nanoseconds.

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

In conclusion, the AT27C040-70PC is a programmable read-only memory chip that provides reliable and permanent storage of data.