The AM28F010-90PI is a 1 Mbit (128K x 8) Flash memory device manufactured by Advanced Micro Devices (AMD). It is designed for applications requiring non-volatile, in-system reprogrammability.

Applications:

• Embedded Systems: Storage of firmware, boot code, and configuration data.
• Industrial Control Systems: Non-volatile storage of control programs and parameters.
• Networking Equipment: Storage of network operating systems and configuration settings.
• Telecommunications Equipment: Storage of system software and call processing routines.
• BIOS Storage: Used in early PC systems for storing the Basic Input/Output System.

Features:

• 1 Mbit (128K x 8) Memory Organization: Provides 1,048,576 bits of storage.
• 90ns Access Time: Allows for fast data retrieval.
• Single 5V Power Supply: Simplifies power supply requirements.
• Sector Erase: Enables selective erasure of memory blocks.
• In-System Reprogrammability: Allows for updates without removing the device.
• TTL Compatible Inputs/Outputs: Facilitates easy interfacing with other logic circuits.

Benefits:

• Non-Volatile Storage: Retains data even when power is removed.
• In-System Programmability: Allows for easy updates and modifications.
• Fast Access Time: Ensures quick data access.
• Sector Erase Capability: Enables efficient memory management.
• High Reliability: Provides dependable data storage.

The 'PI' likely refers to the package type, which is probably a Plastic DIP (Dual In-line Package). The '90' indicates a 90 nanosecond access time. This Flash memory part offered significant advantages over EPROMs in terms of in-system programmability and faster erase times. AMD's AM28F010 was a popular choice in the late 1980s and early 1990s for applications where firmware updates were frequently required. While newer, higher-density Flash memory technologies are now available, the AM28F010-90PI remains relevant for legacy systems and certain niche applications. It represents a significant step in the evolution of non-volatile memory technologies.