AT27C256R-55TC

Product Overview

Category

AT27C256R-55TC 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 allows users to write data onto the chip during manufacturing and then read it multiple times.

Characteristics

• Non-volatile: The stored data remains intact even without power supply.
• High storage capacity: The AT27C256R-55TC has a capacity of 256 kilobits, allowing for significant data storage.
• Fast access time: With a maximum access time of 55 nanoseconds, this chip ensures quick retrieval of data.
• Reliable: The AT27C256R-55TC offers high reliability and endurance, making it suitable for various applications.

Package

The AT27C256R-55TC comes in a standard 28-pin dual in-line package (DIP), which is widely used in electronic devices.

Essence

The essence of AT27C256R-55TC lies in its ability to store and retrieve data reliably, making it an essential component in many electronic systems.

Packaging/Quantity

This product 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.

Specifications

• Capacity: 256 kilobits
• Access Time: 55 nanoseconds
• Supply Voltage: 5V
• Operating Temperature Range: -40°C to +85°C
• Pin Count: 28
• Package Type: DIP

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. A8
13. A9
14. A11
15. A10
16. VCC (+5V Power Supply)
17. /CE (Chip Enable)
18. I/O0
19. I/O1
20. I/O2
21. I/O3
22. I/O4
23. I/O5
24. I/O6
25. I/O7
26. GND (Ground)
27. NC (No Connection)
28. /WE (Write Enable)

Functional Features

• High-speed operation: The AT27C256R-55TC offers fast access times, allowing for efficient data retrieval.
• Easy integration: This chip can be easily integrated into various electronic systems due to its standard pin configuration and package type.
• Low power consumption: The AT27C256R-55TC is designed to consume minimal power, making it suitable for battery-powered devices.
• Reliable data retention: The non-volatile nature of this PROM chip ensures that stored data remains intact over long periods.

Advantages and Disadvantages

Advantages

• Non-volatile memory ensures data retention even without power supply.
• High storage capacity allows for significant data storage.
• Fast access time enables quick retrieval of data.
• Reliable and durable, ensuring long-term performance.

Disadvantages

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

Working Principles

The AT27C256R-55TC operates based on the principle of electrical charge trapping. During programming, a voltage is applied to specific pins to store data as electrical charges in the memory cells. These charges are then read by applying appropriate voltages to retrieve the stored information.

Detailed Application Field Plans

The AT27C256R-55TC finds applications in various fields, including: 1. Embedded systems: Used for storing firmware and configuration data. 2. Automotive electronics: Employed in engine control units (ECUs) and other critical systems. 3. Consumer electronics: Utilized in devices such as gaming consoles and set-top boxes for data storage. 4. Industrial automation: Integrated into programmable logic controllers (PLCs) for storing program instructions.

Detailed and Complete Alternative Models

1. AT28C256-15PU: Similar to AT27C256R-55TC but with a slower access time of 150 nanoseconds.
2. AM29F040B-90JC: Flash memory chip with a larger capacity of 4 megabits.
3. M27C256B-12F1: EPROM chip with a capacity of 256 kilobits and a faster access time of 120 nanoseconds.

These alternative models offer similar functionality to the AT27C256R-55TC but may have different specifications and characteristics.

In conclusion, the AT27C256R-55TC is a reliable and high-cap