CompactPCI® Serial XMC Module Carrier • PCIe® x8 • Single Ended Signals Rear I/O Option

The SK4-WALTZ is a peripheral slot board for CompactPCI® Serial systems and acts as carrier card for an XMC-style mezzanine module. XMC modules a re specified by ANSI/VITA 42, as an advanced replacement for PMC modules. While using a similar form factor as PMC cards, XMC modules are provided with a PCI Express® interface. The SK4-WALTZ can be used together with 74x149mm2 full length or 74x139mm2 short length XMC mezzanine cards.
The SK4-WALTZ is equipped with a bidirectional 8-lane PCI Express® Gen3 redriver, for optimum high speed signal integrity, and should be installed into a fat pipe peripheral slot of a CompactPCI® Serial backplane. As an option, the SK4-WALTZ can be populated with rear I/O connectors. The XMC carrier connector J16 signals are available across the CompactPCI® Serial backplane connectors P4/P5, and J14 has been routed to P3. The SK4-WALTZ requires at least a single PCI Express® lane from the backplane, passed over across the connector P1 to a PCIe redriver circuit. Up to eight PCI Express® lanes are supported, when the SK4-WALTZ is installed into a CompactPCI® Serial fat pipe peripheral slot (P1/P2 backplane connectors in use). With a total link bandwidth of 64Gbps, even very demanding applications can be realized, such as a 10/40GBps Ethernet or USB 3.1 XMC mezzanine module e.g.
The on-board 8-lane bidirectional redriver is suitable up to 8.0Gbps (PCIe 3.0) data transfer rate per lane, and ensures optimum signal integrity (wider opening with respect to the eye diagrams). The XMC module connector J15 is directly tied to the redriver circuit. In addition, a zero delay PCIe Gen3 clock buffer is provided on-board. The SK4-WALTZ front panel is covered by a 17.5mm protruding metal shell, which allows 149mm full length XMC mezzanine modules to be accommodated.

Downloads & Ressources

General Information

Ordering Information

  • 3U/4HP
  • XMC module carrier up to PCIe x8
  • suitable for 74x149mm size XMC modules
  • rear I/O J14/ rear I/O J14/J16 via P3-P5
  • XMC slot covered by protruding metal shell

Expansion Modules

XMC Mezzanine Modules
XMC Mezzanine Modules
Alternate Low Profile Mezzanine Modules


  • PICMG® CompactPCI® Serial standard (CPCI-S.0) peripheral slot card
  • Single size Eurocard 3U 4HP 100x160mm2
  • CompactPCI® Serial backplane connectors P1 & P2 (fat pipe slot up to PCIe® x8)
  • Optional backplane connectors P3, P4, P5 for rear I/O usage

Simplified Block Diagram

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