PR21555BB

Overview

The Altera PR21555BB is a specialized integrated circuit designed as a PCI-to-PCI bridge interface. It operates within a voltage supply range of 3V to 3.6V and utilizes a 304-PBGA package with dimensions of 31x31 mm. This component facilitates connectivity between PCI buses, serving as a critical interface element in systems requiring reliable data transfer between peripheral components.

Feature Summary

• Provides dedicated hardware bridging functionality between two PCI bus segments
• Operates reliably within standard 3V to 3.6V power supply specifications

Applications

• Connecting multiple PCI expansion slots in industrial computing systems
• Enabling communication between PCI peripherals in embedded control architectures
• Facilitating data routing in legacy PCI-based server infrastructure

Procurement Notes

Verify the specific revision level and manufacturing date code against current Intel/Altera product lifecycle notices. Confirm that the 304-PBGA footprint matches the target PCB design. Ensure compatibility with existing system BIOS or firmware configurations for proper enumeration of downstream PCI devices.

Selection Notes

Select this component when a dedicated hardware solution for PCI-to-PCI bridging is required rather than software-based arbitration. Consider the 304-PBGA package size constraints and thermal requirements. Evaluate if the fixed 3V-3.6V operating range aligns with the system's power delivery network capabilities.

Part Context

This part belongs to Altera's specialized interface portfolio, distinct from their FPGA lines. It addresses specific interconnect needs in complex electronic systems where direct PCI slot expansion or segmentation is necessary without utilizing general-purpose programmable logic resources.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult Intel/Altera official cross-reference guides for potential obsolescence alternatives.