AT27C512R-90RA

Product Overview

Category

AT27C512R-90RA belongs to the category of programmable read-only memory (PROM) chips.

Use

This product is commonly used for storing permanent data or code that needs to be retained even when power is turned off. It is widely utilized in various electronic devices such as computers, microcontrollers, and consumer electronics.

Characteristics

• Non-volatile: The stored data remains intact even without power supply.
• Programmable: The memory can be written or programmed with specific data.
• Read-only: Once programmed, the data cannot be modified or erased.

Package

AT27C512R-90RA is available in a standard dual in-line package (DIP), which consists of 28 pins.

Essence

The essence of this product lies in its ability to provide reliable and non-volatile storage for critical data or code in electronic systems.

Packaging/Quantity

AT27C512R-90RA is typically packaged in tubes or trays, with each containing a specified quantity of chips. The exact packaging and quantity may vary depending on the manufacturer.

Specifications

• Memory Capacity: 512 kilobits (64 kilobytes)
• Access Time: 90 nanoseconds
• Supply Voltage: 5 volts
• Operating Temperature Range: -40°C to +85°C
• Data Retention: Minimum 10 years

Pin Configuration

The detailed pin configuration of AT27C512R-90RA is as follows:

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. /CE (Chip Enable)
13. NC (No Connection)
14. D0
15. D1
16. D2
17. D3
18. D4
19. D5
20. D6
21. D7
22. VCC (Supply Voltage)
23. /PGM (Program)
24. /VPP (Programming Voltage)
25. A8
26. A9
27. A11
28. A13

Functional Features

• High-speed access: The 90 nanosecond access time ensures quick retrieval of data.
• Low power consumption: AT27C512R-90RA operates efficiently with low power requirements.
• Easy integration: The chip can be easily integrated into existing electronic systems due to its standard pin configuration and package.

Advantages and Disadvantages

Advantages

• Non-volatile memory ensures data retention even during power loss.
• Reliable storage solution for critical data or code.
• Easy to integrate into various electronic devices.
• Low power consumption.

Disadvantages

• Once programmed, the data cannot be modified or erased, limiting flexibility.
• Limited storage capacity compared to other memory technologies.

Working Principles

AT27C512R-90RA utilizes a technology called electrically programmable read-only memory (EPROM). It consists of a grid of memory cells that can be individually programmed with specific data using electrical signals. Once programmed, the data remains stored in the memory until it is read or accessed.

Detailed Application Field Plans

AT27C512R-90RA finds applications in various fields, including: 1. Computer systems: Used for storing BIOS (Basic Input/Output System) code. 2. Microcontrollers: Provides non-volatile storage for firmware and program code. 3. Consumer electronics: Utilized for storing fixed data such as device configurations or calibration values.

Detailed and Complete Alternative Models

Some alternative models to AT27C512R-90RA include: 1. AT28C64B-15PU: 64 kilobit (8 kilobyte) EEPROM chip with a 150 nanosecond access time. 2. M27C256B-12F1: 256 kilobit (32 kilobyte) EPROM chip with a 120 nanosecond access time. 3. SST39SF010A-70-4C-PHE: 1 megabit (128 kilobyte) Flash memory chip with a 70 nanosecond access time.

These alternative models offer different capacities, access times, and memory technologies to suit specific application requirements.

In conclusion, AT27C512R-90RA is a programmable read-only memory chip that provides reliable and non-volatile storage for critical data or code in electronic systems. Its characteristics, specifications, pin configuration, functional features, advantages, disadvantages, working principles, application field plans, and alternative models make it a versatile choice for various applications.