AT27C256R-45PI

Product Overview

Category

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

Use

It is primarily used for storing data that needs to be permanently retained, even when power is turned off. PROM chips are widely used in various electronic devices and systems.

Characteristics

• Non-volatile: The stored data remains intact even without power.
• Programmable: The chip can be programmed with specific data before being installed in a device.
• Read-only: Once programmed, the data cannot be modified or erased.

Package

AT27C256R-45PI comes in a standard integrated circuit (IC) package. The specific package type may vary depending on the manufacturer.

Essence

The essence of AT27C256R-45PI lies in its ability to provide non-volatile storage for critical data in electronic systems.

Packaging/Quantity

The chip is typically sold in reels or tubes, containing a specific quantity of units per package. The exact packaging and quantity may vary based on the supplier.

Specifications

• Model: AT27C256R-45PI
• Memory Capacity: 256 kilobits (32 kilobytes)
• Access Time: 45 nanoseconds
• Supply Voltage: 5 volts
• Operating Temperature Range: -40°C to +85°C
• Pin Count: 28

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
12. /WE
13. /CE
14. I/O0
15. I/O1
16. I/O2
17. I/O3
18. VCC
19. GND
20. NC
21. A8
22. A9
23. A11
24. A10
25. /BYTE
26. /PGM
27. /VPP
28. /ACC

Functional Features

• High-speed access: The chip offers fast access times, allowing for efficient data retrieval.
• Low power consumption: AT27C256R-45PI is designed to operate with minimal power requirements.
• Reliable data retention: The non-volatile nature of PROM ensures that stored data remains intact over extended periods.

Advantages and Disadvantages

Advantages

• Non-volatile storage: Data remains intact even without power.
• Easy integration: Can be easily integrated into various electronic systems.
• Cost-effective: PROM chips are generally more affordable compared to other memory technologies.

Disadvantages

• Limited write capability: Once programmed, the data cannot be modified or erased.
• Lower storage capacity: Compared to other memory types, PROM has relatively lower storage capacity.

Working Principles

AT27C256R-45PI operates based on the principle of electrical charge trapping. During programming, specific bits are selectively charged or uncharged, representing the desired data pattern. These charges are then trapped within the memory cells, ensuring data retention even when power is removed.

Detailed Application Field Plans

AT27C256R-45PI finds applications in various fields, including: 1. Embedded systems 2. Automotive electronics 3. Industrial control systems 4. Medical devices 5. Consumer electronics

Detailed and Complete Alternative Models

1. AT27C512R-70PU
2. AT27C010-70PU
3. AT27C040-90PU
4. AT27C080-90PU
5. AT27C2048-90PU

These alternative models offer similar functionality and characteristics to AT27C256R-45PI, but with varying memory capacities and access times.

In conclusion, AT27C256R-45PI is a programmable read-only memory chip that provides non-volatile storage for critical data in electronic systems. With its high-speed access, low power consumption, and reliable data retention, it finds applications in various fields. While it has limitations in write capability and storage capacity, it remains a cost-effective solution for many applications.