The AM27C128-90JC is a 128K-bit (16K x 8) CMOS EPROM (Erasable Programmable Read-Only Memory) manufactured by Advanced Micro Devices (AMD). It is a non-volatile memory device that can be electrically programmed by the user. The '90' in the part number indicates a 90ns access time, signifying its speed.

Applications

• Firmware storage in embedded systems
• Boot code storage
• Program storage for microcontrollers
• Lookup tables
• Character generators

Features

• 128K-bit (16K x 8) organization
• Fast access time: 90 ns
• Single 5V power supply
• CMOS technology for low power consumption
• Electrically programmable
• UV erasable
• Three-state outputs

Benefits

• Non-volatile storage of program code and data
• Fast access time for quick data retrieval
• Low power consumption minimizes heat generation
• Easy to program and erase
• Suitable for a wide range of applications

Additional Details

The AM27C128-90JC is programmed by applying a high voltage to the programming pins. The memory can be erased by exposing it to ultraviolet (UV) light through a quartz window on the top of the package. The device is available in a 28-pin ceramic DIP package with a quartz window. The three-state outputs allow multiple devices to share the same data bus.

The CMOS technology used in the AM27C128-90JC results in low power consumption, making it suitable for battery-powered applications. The fast access time ensures quick data retrieval, which is critical for real-time embedded systems. The device's electrically programmable and UV erasable nature allows for easy prototyping and development. It's a reliable solution for storing program code and data in a variety of applications. Due to its age, it's typically found in legacy equipment and older designs.

When using the AM27C128-90JC, ensure proper handling to avoid electrostatic discharge (ESD) damage. Follow the manufacturer's recommendations for programming and erasure to ensure reliable operation.