AT27C256R-70RC

Product Overview

Category

AT27C256R-70RC belongs to the category of programmable read-only memory (PROM) chips.

Use

This chip is commonly used for storing non-volatile data in electronic devices. It allows users to write data onto the chip during manufacturing and then read it back later.

Characteristics

• Non-volatile: The stored data remains intact even when power is removed.
• High storage capacity: The AT27C256R-70RC can store up to 256 kilobits (32 kilobytes) of data.
• Fast access time: With a speed rating of 70 nanoseconds, it provides quick access to stored information.
• Low power consumption: The chip operates efficiently, consuming minimal power.
• Reliable: It offers high endurance and data retention capabilities.

Package

The AT27C256R-70RC chip is available in a standard dual in-line package (DIP). This package type consists of two parallel rows of pins that can be inserted into a socket on a circuit board.

Essence

The essence of the AT27C256R-70RC chip lies in its ability to store and retrieve data reliably, making it an essential component in various electronic devices.

Packaging/Quantity

The AT27C256R-70RC chip 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 and supplier.

Specifications

• Storage Capacity: 256 kilobits (32 kilobytes)
• Access Time: 70 nanoseconds
• Supply Voltage: 5 volts
• Operating Temperature Range: -40°C to +85°C
• Package Type: Dual In-Line Package (DIP)

Detailed Pin Configuration

The AT27C256R-70RC chip has a total of 28 pins, each serving a specific purpose. The pin configuration is as follows:

1. A0: Address Input
2. A1: Address Input
3. A2: Address Input
4. A3: Address Input
5. A4: Address Input
6. A5: Address Input
7. A6: Address Input
8. A7: Address Input
9. A8: Address Input
10. A9: Address Input
11. A10: Address Input
12. A11: Address Input
13. A12: Address Input
14. A13: Address Input
15. A14: Address Input
16. A15: Address Input
17. /OE: Output Enable
18. /CE: Chip Enable
19. /WE: Write Enable
20. VCC: Supply Voltage
21. DQ0: Data Output
22. DQ1: Data Output
23. DQ2: Data Output
24. DQ3: Data Output
25. DQ4: Data Output
26. DQ5: Data Output
27. DQ6: Data Output
28. DQ7: Data Output

Functional Features

The AT27C256R-70RC chip offers the following functional features:

• Read Operation: The chip allows users to read data stored in its memory cells.
• Write Operation: During manufacturing, data can be written onto the chip using specialized programming equipment.
• Output Enable Control: The /OE pin enables or disables the data output from the chip.
• Chip Enable Control: The /CE pin activates or deactivates the chip for reading or writing operations.
• Write Enable Control: The /WE pin controls the write operation by enabling or disabling it.

Advantages and Disadvantages

Advantages

• Non-volatile storage ensures data retention even without power.
• High storage capacity allows for storing a significant amount of data.
• Fast access time provides quick retrieval of information.
• Low power consumption contributes to energy efficiency.
• Reliable endurance ensures long-term data integrity.

Disadvantages

• Limited write cycles: The chip has a finite number of times it can be written to before it becomes unreliable.
• Lack of flexibility: Once programmed, the data stored on the chip cannot be easily modified or erased.

Working Principles

The AT27C256R-70RC chip utilizes a combination of electronic circuits and memory cells to store and retrieve data. During the manufacturing process, data is written onto the chip using specialized programming equipment. Once programmed, the chip retains the data even when power is removed. When needed, the chip can be accessed to read the stored data.

Detailed Application Field Plans

The AT27C256R-70RC chip finds applications in various fields, including:

1. Embedded Systems: It is used in microcontrollers and other embedded systems to store firmware and configuration data.
2. Automotive Electronics: The chip is employed in automotive electronics for storing critical