The QD27128A-20 is a 128K (16K x 8) EPROM (Erasable Programmable Read-Only Memory) manufactured by Intel. It is designed for storing non-volatile data in microprocessor-based systems. This memory chip is commonly used to store firmware, boot code, and other critical data that needs to be retained even when the power is turned off.

Applications:

• Embedded Systems: Used for storing firmware in embedded systems such as industrial controllers and consumer electronics.
• Microcontroller Applications: Employed to store program code and data in microcontroller-based devices.
• Instrumentation Equipment: Integrated into test and measurement equipment to store calibration data and software.
• Industrial Control Systems: Utilized in industrial automation to store control algorithms and configuration settings.
• Boot ROMs: Used as boot ROMs in computer systems and other devices to initiate the startup process.

Features:

• 128K (16K x 8) Memory Capacity: Provides ample storage for program code and data.
• EPROM Technology: Can be erased and reprogrammed using ultraviolet light.
• Fast Access Time: Offers a fast access time of 200ns, enabling quick data retrieval.
• Single 5V Power Supply: Operates on a single 5V power supply, simplifying system integration.
• JEDEC Standard Pinout: Adheres to the JEDEC standard pinout for easy interchangeability with other memory devices.

Benefits:

• Non-Volatile Storage: Retains data even when power is removed, ensuring data integrity.
• Reprogrammability: Allows for easy updates and modifications of stored data.
• Fast Data Access: Enables quick retrieval of stored information, improving system performance.
• Easy Integration: Simplifies system design with its single power supply requirement and standard pinout.
• Reliable Performance: Provides reliable data storage for critical applications.

Additional Details:

The QD27128A-20 is typically characterized by its access time, supply voltage, and operating temperature range. It is commonly used in applications where non-volatile storage and reprogrammability are essential. The device's robust design ensures reliable performance in various operating conditions. Detailed technical specifications, including timing diagrams and electrical characteristics, are available in the product datasheet. The '20' in the name indicates an access time of 200ns.