728980JG8

Overview

The Renesas 728980JG8 is a digital bus switch IC housed in a 44-pin PLCC package. It functions as a 256x256 microprocessor interface with an 8-bit data bus and output channels. The device supports ST-BUS protocol, organizing 256 channels into 8 serial inputs and 8 serial outputs within 125μs wide frames containing 32 channels each. It utilizes a 4.096 MHz serial interface clock and includes internal serial-to-parallel converters for data storage.

Feature Summary

• Supports ST-BUS protocol with 256-position data memory
• Integrates serial-to-parallel conversion capabilities
• Provides dedicated serial input and output streams

Applications

• Microprocessor interface systems
• ST-BUS compliant signal routing
• Digital bus switching applications

Procurement Notes

Verify the manufacturer designation carefully, as the component is historically associated with IDT before acquisition by Renesas. Confirm that the specific suffix JG8 corresponds to the required PLCC-44 packaging variant. Ensure compatibility with the specified 4.096 MHz clock frequency and frame structure requirements for your design.

Selection Notes

Select this component when a high-density digital bus switch is required for ST-BUS architectures. It is suitable for designs needing parallel data conversion from serial streams. Verify that the 44-pin PLCC form factor fits the target PCB layout constraints and that the voltage levels align with the system specifications.

Part Context

This part belongs to the family of digital bus switches designed for microprocessor interfaces. It facilitates data transfer between serial buses and parallel processing units. The technology relies on internal counters and memory buffers to manage data flow efficiently within defined frame periods.