AT27C256R-45JC

Product Overview

Category

AT27C256R-45JC belongs to the category of programmable read-only memory (PROM) chips.

Use

This product is primarily used for storing data that needs to be permanently written and cannot be modified or erased. It is commonly employed in applications where non-volatile memory is required.

Characteristics

• Non-volatile: The stored data remains intact even when power is removed.
• High storage capacity: The AT27C256R-45JC has a capacity of 256 kilobits (32 kilobytes).
• Fast access time: With a speed of 45 nanoseconds, it provides quick data retrieval.
• Low power consumption: The chip operates on low power, making it suitable for battery-powered devices.

Package

The AT27C256R-45JC comes in a 28-pin plastic dual in-line package (PDIP).

Essence

The essence of this product lies in its ability to store data permanently, ensuring reliable and secure information retention.

Packaging/Quantity

The AT27C256R-45JC is typically packaged in tubes or trays, with quantities varying based on customer requirements.

Specifications

• Memory Capacity: 256 kilobits (32 kilobytes)
• Access Time: 45 nanoseconds
• Supply Voltage: 4.5V - 5.5V
• Operating Temperature Range: -40°C to +85°C
• Package Type: 28-pin PDIP

Detailed Pin Configuration

1. A14
2. A12
3. A7
4. A6
5. A5
6. A4
7. A3
8. A2
9. A1
10. A0
11. /OE (Output Enable)
12. /WE (Write Enable)
13. /CE (Chip Enable)
14. VSS (Ground)
15. Q7
16. Q6
17. Q5
18. Q4
19. Q3
20. Q2
21. Q1
22. Q0
23. VCC (Supply Voltage)
24. A8
25. A9
26. A11
27. A10
28. A13

Functional Features

• Non-volatile storage: The AT27C256R-45JC retains data even when power is disconnected.
• High-speed access: With an access time of 45 nanoseconds, it enables quick retrieval of stored information.
• Easy integration: The chip can be easily integrated into various electronic systems due to its standard pin configuration.
• Low power consumption: It operates on low power, making it suitable for energy-efficient devices.

Advantages and Disadvantages

Advantages

• Permanent data storage
• Fast access time
• Easy integration into existing systems
• Low power consumption

Disadvantages

• Data cannot be modified or erased once programmed
• Limited storage capacity compared to other memory technologies

Working Principles

The AT27C256R-45JC utilizes a technology called electrically programmable read-only memory (EPROM). It consists of a grid of memory cells that can be individually programmed by applying specific electrical voltages. Once programmed, the data remains stored in the memory cells until the chip is replaced.

Detailed Application Field Plans

The AT27C256R-45JC finds applications in various fields, including:

1. Embedded Systems: Used for firmware storage in microcontrollers and other embedded devices.
2. Automotive Electronics: Employed for storing critical data such as calibration parameters and firmware in automotive control units.
3. Industrial Automation: Utilized for storing configuration settings and program code in industrial automation systems.
4. Consumer Electronics: Used in devices like gaming consoles, set-top boxes, and digital cameras for storing firmware and data.

Detailed and Complete Alternative Models

1. AT27C512R-45JC: A similar PROM chip with double the storage capacity (512 kilobits).
2. AT28C256-15PU: An electrically erasable programmable read-only memory (EEPROM) chip with the same storage capacity and a slower access time of 150 nanoseconds.
3. AM29F040B-90JC: A flash memory chip with a larger storage capacity (4 megabits) and faster access time (90 nanoseconds).

(Note: The alternative models mentioned above are just a few examples and not an exhaustive list.)

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