M27C4002-45XF1

Product Overview

Category

The M27C4002-45XF1 belongs to the category of integrated circuits (ICs) and specifically falls under the category of programmable read-only memory (PROM) chips.

Use

This product is primarily used for storing data that needs to be permanently retained even when power is removed. It is commonly employed in various electronic devices such as computers, consumer electronics, and automotive applications.

Characteristics

• Non-volatile memory: The M27C4002-45XF1 retains stored data even without a power supply.
• High storage capacity: With a capacity of 4 megabits (512 kilobytes), it can store a significant amount of data.
• Fast access time: The chip offers quick access to stored information, ensuring efficient data retrieval.

Package

The M27C4002-45XF1 is available in a standard 32-pin plastic dual in-line package (PDIP). This package provides mechanical protection and facilitates easy integration into circuit boards.

Essence

The essence of the M27C4002-45XF1 lies in its ability to provide non-volatile memory storage with high capacity and fast access times, making it suitable for a wide range of applications.

Packaging/Quantity

The M27C4002-45XF1 is typically packaged in reels or tubes, with each reel or tube containing a specific quantity of chips. The exact packaging and quantity may vary depending on the manufacturer and customer requirements.

Specifications

• Memory Type: Programmable Read-Only Memory (PROM)
• Capacity: 4 Megabits (512 Kilobytes)
• Access Time: 45 Nanoseconds
• Supply Voltage: 5 Volts
• Operating Temperature Range: -40°C to +85°C
• Pin Count: 32
• Package Type: Plastic Dual In-Line Package (PDIP)

Detailed Pin Configuration

The M27C4002-45XF1 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
13. A14 - Address Input
14. A13 - Address Input
15. A8 - Address Input
16. A9 - Address Input
17. A11 - Address Input
18. A10 - Address Input
19. DQ0 - Data Input/Output
20. DQ1 - Data Input/Output
21. DQ2 - Data Input/Output
22. DQ3 - Data Input/Output
23. DQ4 - Data Input/Output
24. DQ5 - Data Input/Output
25. DQ6 - Data Input/Output
26. DQ7 - Data Input/Output
27. CE - Chip Enable
28. OE - Output Enable
29. WE - Write Enable
30. NC - No Connection
31. GND - Ground
32. VCC - Power Supply

Functional Features

The M27C4002-45XF1 offers the following functional features:

• High-speed access: With an access time of 45 nanoseconds, it enables quick retrieval of stored data.
• Easy integration: The chip can be easily integrated into existing circuit designs due to its standard pin configuration and package.
• Non-volatile storage: The M27C4002-45XF1 retains data even when power is removed, ensuring permanent storage.

Advantages and Disadvantages

Advantages

• High storage capacity allows for the storage of large amounts of data.
• Fast access time ensures efficient retrieval of stored information.
• Non-volatile memory ensures data retention even during power loss.
• Easy integration into circuit designs due to standard pin configuration and package.

Disadvantages

• Limited write cycles: PROM chips have a finite number of times they can be programmed, which may restrict certain applications requiring frequent reprogramming.
• Lack of flexibility: Once programmed, the data stored in PROM cannot be modified or erased, limiting its use in applications that require dynamic data storage.

Working Principles

The M27C4002-45XF1 operates based on the principle of electrical charge trapping. During programming, specific memory cells are selectively charged or uncharged to represent binary data. These charges are retained within the memory cells, allowing for non-volatile storage.

During read operations, the addressed memory cell's charge state is detected, and the