The IS27C512-90PL is a high-performance 512K (64K x 8) Electrically Programmable Read-Only Memory (EPROM) manufactured by ISSI (Integrated Silicon Solution Inc.). It is designed for applications requiring non-volatile storage of data and code.

Applications:

• Embedded systems
• Microcontroller programs
• Firmware storage
• Data logging
• Industrial control
• Instrumentation
• Telecommunications equipment

Features:

• 512K (64K x 8) memory organization
• Fast access time (90ns)
• Single 5V power supply
• TTL compatible inputs and outputs
• Three-state output
• JEDEC standard pinout
• UV erasable

Benefits:

• Provides non-volatile storage for critical data and code.
• Enables fast access to stored information.
• Simplifies system design and reduces component count.
• Interfaces easily with TTL logic circuits.
• Allows for multiple devices to share the same data bus.
• Ensures compatibility with standard EPROM programmers.
• Allows for reprogramming by exposure to ultraviolet light.

Additional Details:

The IS27C512-90PL is a reliable and cost-effective solution for non-volatile storage. The 90ns access time makes it suitable for applications requiring fast data retrieval. The single 5V power supply simplifies system design and reduces power consumption. The TTL compatible inputs and outputs allow for easy interfacing with TTL logic circuits. The three-state output allows for multiple devices to share the same data bus. The JEDEC standard pinout ensures compatibility with standard EPROM programmers. The UV erasable feature allows for reprogramming by exposure to ultraviolet light.

The "90" in the part number indicates an access time of 90 nanoseconds. The "PL" likely refers to the package type, such as a plastic leaded chip carrier. The device requires a 5V power supply for operation. It is programmed using a standard EPROM programmer, and it is erased by exposure to ultraviolet light through a quartz window on the top of the package. Once erased, the memory cells can be reprogrammed with new data. Consult the ISSI datasheet for detailed programming instructions and electrical characteristics.