The Rochester Electronics N82C288-12 is a CMOS Bus Controller designed as a direct replacement for the Intel 82C288. It is a critical component in older Intel-based microprocessor systems, responsible for managing the flow of data and control signals on the system bus. Rochester Electronics specializes in providing long-term support and continuing manufacturing of end-of-life semiconductors, ensuring availability for legacy systems and applications.

Applications

• Legacy Computer Systems: Used in older PC motherboards and industrial computers.
• Industrial Control Systems: Employed in older automated manufacturing equipment and control systems.
• Military and Aerospace Systems: Supports mission-critical systems that require long-term component availability.
• Telecommunications Equipment: Used in older telecommunications infrastructure.
• Embedded Systems: Supports embedded systems based on older Intel microprocessors.

Features

• CMOS Technology: Low power consumption compared to older NMOS versions.
• Bus Control Logic: Generates all necessary control signals for memory and I/O access.
• Direct Replacement: Pin-compatible replacement for the Intel 82C288.
• Long-Term Availability: Manufactured by Rochester Electronics to ensure continued supply.
• 12 MHz Operation: Supports bus clock frequencies up to 12 MHz.

Benefits

• System Maintenance: Enables continued operation of legacy systems by providing a critical component.
• Reduced Redesign Costs: Avoids costly system redesigns by providing a drop-in replacement.
• Extended Product Lifecycles: Extends the lifespan of existing equipment and systems.
• Guaranteed Performance: Meets or exceeds the performance specifications of the original part.
• Reduced Risk of Obsolescence: Mitigates the risk of system failure due to component obsolescence.

Additional Details

The N82C288-12 generates all the necessary control signals for interfacing a microprocessor to memory and I/O devices. These control signals include memory read (MRDC), memory write (MWTC), I/O read (IORC), and I/O write (IOWC). It typically operates in conjunction with other bus support chips, such as bus transceivers and address latches, to form a complete bus interface. Key specifications include the timing characteristics of the control signals, the power supply voltage requirements, and the operating temperature range. The device is typically packaged in a DIP (Dual In-line Package) for through-hole mounting. Refer to the datasheet for detailed timing diagrams, pinout information, and application notes.