The P28F256A-200 is a 256K (32K x 8) Flash Memory device manufactured by Intel. This is a parallel flash memory, meaning data is accessed and written in parallel rather than serially. It is a non-volatile memory, retaining data even when power is removed. The -200 indicates an access time of 200ns. This part is commonly used in embedded systems and older computer systems where quick access and low power consumption are important.

Applications

• Embedded systems firmware storage
• BIOS storage in older PCs
• Programmable logic controllers (PLCs)
• Industrial control systems
• Data logging systems

Features

• Fast access time (200ns)
• Non-volatile data storage
• Single 5V power supply
• Erase and program capability
• Sector erase architecture
• TTL compatible inputs/outputs

Benefits

• Allows for quick program execution in embedded systems.
• Data is retained even when power is off, ensuring reliable operation.
• Simplified power supply requirements reduce system complexity.
• Firmware updates and data storage are possible without replacing the chip.
• Efficient memory utilization with sector erase capability.
• Easy integration with other TTL logic devices.

Technical Specifications

The P28F256A-200 operates with a single 5V power supply. It has an access time of 200 nanoseconds. The memory is organized as 32,768 bytes (32K x 8). It features a sector erase architecture, allowing individual sectors to be erased and reprogrammed without affecting other parts of the memory. It is housed in a DIP (Dual In-line Package). The device also includes features like protection against accidental programming and erasure. The operating temperature range is typically from 0°C to 70°C. Detailed electrical characteristics, timing diagrams, and programming algorithms are available in the Intel datasheet.

While it's an older component, the P28F256A-200 continues to be valuable in legacy systems and specific embedded applications where its characteristics meet the design requirements. Its non-volatility and relatively fast access time make it a suitable choice for storing boot code, configuration data, and other critical information.