22-lane, 16-port PCIe System Interconnect Switch

The 89HPES22H16 is a member of the IDT PRECISE family of PCI Express switching solutions. The PES22H16 is a 22-lane, 16-port peripheral chip that performs PCI Express packet switching with a feature set optimized for high-performance applications such as servers, storage, and communications/networking. It provides connectivity and switching functions between a PCI Express upstream port and up to fifteen downstream ports and supports switching between downstream ports.

• High Performance PCI Express Switch
  • Sixteen maximum switch ports
  • Two x4 ports
  • Fourteen x1 ports
  • Twenty-two 2.5 Gbps embedded SerDes
• Supports pre-emphasis and receive equalization on per-port basis
  • Delivers 88 Gbps (11 GBps) of aggregate switching capacity
  • Low-latency cut-through switch architecture
  • Support for Max Payload Size up to 2048 bytes
  • Supports two virtual channels and eight traffic classes
  • PCI Express Base Specification Revision 1.1 compliant
• Flexible Architecture with Numerous Configuration Options
  • Port arbitration schemes utilizing round robin algorithms
  • Automatic per port link width negotiation from x4 to x2 or x1
  • Automatic lane reversal on all ports
  • Automatic polarity inversion on all lanes
  • Supports locked transactions, allowing use with legacy software
  • Ability to load device configuration from serial EEPROM
  • Ability to control device via SMBus
• Highly Integrated Solution
  • Requires no external components
  • Incorporates on-chip internal memory for packet buffering and queuing
  • Integrates twenty-two 2.5 Gbps embedded full duplex SerDes, 8B/10B encoder/decoder (no separate transceivers needed)
• Reliability, Availability, and Serviceability (RAS) Features
  • Redundant upstream port failover capability
  • Supports optional PCI Express end-to-end CRC checking