PEX 8748 General Features 

o 48-lane, 12-port PCIe Gen 3 switch 

 - Integrated 8.0 GT/s SerDes  

o 27 x 27mm2  , 676-pin FCBGA package 

o Typical Power: 8.0 Watts 

PEX 8748 Key Features 

Standards Compliant  

 - PCI Express Base Specification, r3.0 (compatible w/ PCIe r1.0a/1.1 & 2.0) 

 - PCI Power Management Spec, r1.2 

 - Microsoft Vista Compliant 

 - Supports Access Control Services 

 - Dynamic link-width control 

 - Dynamic SerDes speed control 

High Performance  

♦ performancePAK 

 - Read Pacing (bandwidth throttling) 

 - Multicast 9 Dynamic Buffer/FC Credit Pool 

- Non-blocking switch fabric 

- Full line rate on all ports 

- Packet Cut-Thru with 100ns max packet latency (x16 to x16) 

- 2KB Max Payload Size 

Flexible Configuration 

- Ports configurable as x1, x2, x4, x8, x16 

- Registers configurable with strapping 2 pins, EEPROM, I C, or host software 

- Lane and polarity reversal 

- Compatible with PCIe 1.0a PM 

Multi-Host & Fail-Over Support 

- Configurable Non-Transparent (NT) port 

- Failover with NT port 

- Up to 6 upstream/Host ports with 1+1 or N+1 failover to other upstream ports 

Quality of Service (QoS) 

- Eight traffic classes per port 

- Weighted round-robin source port arbitration 

Reliability, Availability, Serviceability 

♦ visionPAK 

 - Per Port Performance Monitoring 

  - Per port payload & header counters 

 - SerDes Eye Capture 9 PCIe Packet Generator 

 - Error Injection and Loopback 

- 3 Hot Plug Ports with native HP Signals 

- All ports hot plug capable thru I² C (Hot Plug Controller on every port) 

- ECRC and Poison bit support 

- Data Path parity 

- Memory (RAM) Error Correction 

- INTA# and FATAL_ERR# signals 

- Advanced Error Reporting 

- Port Status bits and GPIO available 

 • Per port error diagnostics 

- JTAG AC/DC boundary scan