The CY27C256-120PC is a 256 Kbit (32K x 8) CMOS EPROM (Erasable Programmable Read-Only Memory) manufactured by Cypress Semiconductor. This memory chip is designed for storing non-volatile data or program code in embedded systems and other applications where data retention is crucial even without power. The '120' in the part number indicates an access time of 120 nanoseconds, signifying relatively fast data retrieval.

Applications

• Storage of firmware in embedded systems, such as printers and industrial controllers.
• Program storage in microcontroller-based systems.
• Storing configuration data in programmable logic controllers (PLCs).
• Data storage in applications requiring infrequent updates.
• Use in legacy systems where EPROM technology is required.

Features

• 256 Kbit (32K x 8) memory organization: Provides a moderate amount of non-volatile storage.
• Fast access time (120 ns): Enables quick reading of stored data.
• CMOS technology: Ensures low power consumption, suitable for battery-powered applications.
• UV erasable: The memory can be erased using ultraviolet light and then reprogrammed.
• TTL-compatible inputs and outputs: Facilitates easy interfacing with standard logic circuits.
• Single 5V power supply: Simplifies power supply design.
• Available in a DIP (Dual In-line Package): Allows for easy insertion into sockets or through-hole soldering.

Benefits

• Non-volatile data storage: Data is retained even when power is turned off, ensuring reliable system operation.
• Fast data retrieval: The 120 ns access time allows for quick execution of code and data access.
• Low power consumption: Extends battery life in portable or battery-backed systems.
• Reprogrammability: The UV erasable nature of the EPROM allows for updates and modifications to the stored data or code.
• Easy integration: Compatible with standard logic circuits and available in a through-hole package for ease of use.

Additional Details

The CY27C256-120PC requires a single 5V power supply for operation. The EPROM is erased by exposing the chip to ultraviolet light with a wavelength of 2537 Angstroms through the quartz window on the package. Programming is typically done using a dedicated EPROM programmer. Please consult the official Cypress Semiconductor datasheet for detailed electrical specifications, timing diagrams, and programming instructions.