PEX8505-AA25BI

Specialized Overview

The PEX8505-AA25BI is a 5-lane, 5-port PCI Express Gen 1 switch manufactured by Broadcom Limited. It features a non-blocking internal crossbar architecture and supports flexible port configurations including x1, x2, and x4 widths. The device operates within an ambient temperature range of -40°C to +85°C and utilizes a PBGA-196 surface-mount package. Key electrical parameters include a maximum power dissipation of 800 mW and a propagation delay of 138 ns. It complies with the PCI Express Base Specification Revision 1.1 and includes integrated SerDes for high-speed differential signaling.

Specialized Feature Summary

• Supports hot-plug capabilities for high availability
• Enables dynamic lane reversal and polarity correction
• Provides granular SerDes control for low-power operation
• Ensures end-to-end packet integrity via CRC

Specialized Applications

• I/O expansion in server systems
• Control plane usage in network infrastructure
• Printer application connectivity

Specialized Procurement Notes

Verify component authenticity through authorized channels as this part is marked as obsolete. Confirm RoHS compliance status and check for Product Change Notifications (PCN) prior to integration. Ensure supply chain stability due to limited availability and potential obsolescence risks associated with discontinued lifecycle stages.

Specialized Selection Notes

Select this component for designs requiring a compact 5-port PCIe Gen 1 solution. Verify that the system design accommodates the PBGA-196 package dimensions and thermal requirements. Ensure compatibility with strapping pin or I2C configuration methods for port width setup.

Specialized Part Context

This component belongs to the PLX Technology ExpressLane family, now under Broadcom. It serves as a bridge for expanding PCIe connectivity in legacy and industrial systems. The AA silicon revision indicates specific manufacturing updates documented in version 1.1 of the data book.

Specialized Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.