Single slot solution providing an NAT-MCH-PHYS with fully user accessible Intel
® Core™ i7 CPU and storage

The NAT-MCH-PHYS and its associated rear-transition module NAT-MCH-RTM, both members of the NAT-MCH family of products, are leveraging additional flexibility and scalability to MTCA.4 systems. This unique combination releases slots normally occupied by processor Advanced Mezzanine Cards (PrAMCs), storage and graphic AMCs by utilizing the space behind the MCH slot(s) in a MicroTCA.4 chassis.

Rear transition module for the NAT-MCH-PHYS

The NAT-MCH-PHYS is a double-width, full-size MCH, with a special clock module providing low jitter and skew, and a PCIe switch module, providing Gen3 (30Gbps) bandwidth at the fat pipe and can be equipped with one or two SATA Flash Drives (SSD).

Carrier for any Type-6 ComExpress modules

The NAT-MCH-RTM is a fully functional ComExpress Carrier in double width full size format, designed for any Type-6 ComExpress module. The I/O as available from the ComExpress is brought to the front panel of the RTM. The NAT-MCH-RTM connects to the NAT-MCH-PHYS via the Zone3 connector.

Single slot solution for management, switching and PCIe root complex

When being equipped with the optional dual core Intel® Core™ i7 Ivy Bridge ComExpress module, the NAT-MCH-RTM becomes the special version NAT-MCH-RTM-COMex-i7. Utilizing the connections over the Zone3 connector, the ComExpress module has direct access to the facilities located on the NAT-MCH-PHYS:
  • a x4 link to the PCIe Gen2 fat pipe switch (Fabric D-G)
  • a 1GbE link to the 1GbE base fabric switch (Fabric A)
  • two SATA connections to the two SSD mounting sites

® Core™ i7 CPU and storage at user's discretion

Thus the NAT-MCH-RTM-COMex-i7 is functioning as fully featured replacement for a PrAMC which would occupy one AMC payload slot instead. The NAT-MCH-RTM-COMex-i7 provides a fully user accessible dual core Intel® Core™ i7 Ivy Bridge incl. ECC 4GB DDR3-1066, offering high resolution graphics on two DisplayPorts, four USB3.0 and an additional 1GbE at the front panel of the NAT-MCH-RTM-COMex-i7. Further extension capabilities are offered by the optional MicroSD card slot or the optional PCIe Mini card slot (including SIM), typically used with wireless applications.

Family of MCH products

The NAT-MCH-RTM is associated to the NAT-MCH family of MCHs which consists of:


Key features
Technical details
Block diagram
Order code
The NAT-MCH-RTM is the standard rear transition module for the NAT-MCH-PHYS and functions as carrier for any Type-6 ComExpress module.
  • mounting slot for any Type-6 ComExpress module
  • I/O of ComExpress slot connected to NAT-MCH-PHYS via Zone3 connector or available at front panel
  • available with optional dual core Intel® Core™ i7 (version NAT-MCH-RTM-COMex-i7)
    • I/O at front panel of RTM:
      • 2x DisplayPort (high resolution graphics)
      • 4x USB3.0
      • 1x GbE at rear pane
    • connections to NAT-MCH-PHYS
      • 2x SATA connection to two SSD slots
      • one x4 PCIe Gen3 link to fat pipe switch (Fabrics D-G)
      • one 1GbE connection to GbE switch (Fabric A)
  • PCIe Mini card slot (including SIM), MicroSD card slot
(NAT-MCH-RTM with mounted dual core Intel® Core™ i7 ComExpress module)

  • ComExpress-Type 6 module


  • dual core Intel® Core™ i7 (Ivy Bridge -i7-3517UE 2C, 17W (ULV), 1.7GHz)


  • ECC 4GB DDR3-1066

Rear Panel Connector

  • 2x DisplayPort (high resolution graphics)
  • 4x USB3.0
  • 1x 1GbE

Interconnect to Network

  • 2x SATA connection to two SSD slots on NAT-MCH-PHYS
  • one x4 PCIe
  • one x4 PCIe Gen3 link to fat pipe switch (Fabrics D-G) on NAT-MCH-PHYS
  • one 1GbE connection to GbE switch (Fabric A) on NAT-MCH-PHYS

  • PCIe Mini card slot (including SIM)
  • MicroSD card slot


  • one 2.5 inch SSD with 128 GB mounted on NAT-MCH-PHYS or two 1.25 inch SSD in RAID mode on request mounted on NAT-MCH-PHYS

Operating System

  • Linux, Windows, WindRiver O/S (VxWorks, Linux, Hypervisor)


  • MTCA.0 R2.0, MTCA.4 R1.0, AMC.0 R2.0, AMC.1, AMC.2, AMC.4, IMPI V1.5 & V2.0 EN60950, UL1950, RoHS
Rev #
Date Last Modified
nat-mch_ds Data sheet and NAT-MCH family overview pdf 1.179 KB 1.4 06-07-2012
nat_mch_rtm_comex_v1x_man_hw  Hardware Manual for RTMs v1.x pdf  551 KB  1.0  23-07-2013
nat_mch_rtm_comex_v2x_man_hw   Hardware Manual for RTMs v2.x pdf  1.3 MB  1.0 04-04-2016

For further documentation on the NAT-MCH (i.e. technical reference manuals) please contact us using the contact form. Thank you.

NAT-MCH-RTM block diagram

Product Code: NAT-MCH - [Options]

-RTM double-width full-size rear transition module and ComExpress carrier Type-6 ComExpress modules
-RTM-COMex-i7 like option -RTM but with dual core Intel® Core™ i7 (Ivy Bridge -i7-3517UE 2C, 17W (ULV), 1.7GHz) ComExpress module 4GB DDR3-RAM



NATView Java based GUI (Graphical User Interface) for monitoring and control of MTCA systems. 2.25 26-08-2016
NBSP-LINUX-NAT-MCH-RTM Ubuntu Linux for NAT-MCH-RTM-COMex-i7 12.0.4 04-2012