Made in USA
The Embedded Solutions Experts


PCIe adapter for XMC

Order This Item
Ordering Options: Please select the board processing, connector and fan options you wish to order.


PCIe4LXMCX1 Description

  • Industrial Temperature
  • PCIe 1-4 Lane Interface
  • XMC Positions with PCIe Interface Supporting Gen1(2.5 Gbps) and Gen 2 (5 Gbps)
  • Plug and Play operation
  • Local Power Supply for 3.3, 5 and -12V Operating from System +12V
  • 1/2 Length PCIe Card
  • "Zero Slot Fan"™ Compatible
  • Bezel and Pn4 I/O for XMC´s
  • 1 Year Warranty Standard. Extended Warranty Available.
  • ROHS and Standard Processing Available
Simple and easy to use. Install PCIe4LXMCX1 into your PCIe system to adapt an XMC card. The XMC can have bezel and or rear IO. Pn4 and/or Pn6 are supported with PCIe8LXMCX1. 8 lanes are routed from the PCIe gold fingers to the XMC position. XMC´s with up to 8 lanes can be used. The PCIe lanes to/from the XMC are routed per PCIe specifications with matched lengths and impedance control.

For superior performance PCIe4LXMCX1 has two cooling cutouts per position for increased airflow to the XMC´s. If your application requires a fan you can order PCIe4LXMCX1-FAN( ) to have fans mounted to your PCIe8LXMCX1. FAN positions are numbered 1-2, position 1 is closest to the PCIe Bezel [left edge in the picture above.] One fan can be mounted per position. Fans can be mounted to blow onto the XMC or to pull air from the XMC (R option.)

The -12V, 5V, and 3.3V for the XMC are regulated on board. The power supply designs utilize switching regulators controlling a MOSFET to convert 12V. An LC filter ensures clean power at the XMC. The Switch uses a small amount of 3.3 and power derived from 3.3V plus 1.0V derived from +12.. The PCIe gold fingers are rated for 1.1A each, and a total of 5.5A on the +12V rail. 55W are available to the XMC´s after power conversion. Please note this is the combined power requirement across the +12, -12, +5, and 3.3V power used by the XMC´s. In most cases 55W is sufficient. PCIe4LXMCX1 has a cable connector to allow additional 12V power to be added to the card. The two supplies are DIODE coupled. In some cases the 12V supply on the backplane will not be adequately routed by the PC causing voltage sag on the 12V. If this occurs use the cable connector to compensate.

The power supplies include the bulk capacitance to properly bypass the FET´s and post conversion voltage rails. In addition the XMC connectors are bypassed with a .1 uF capacitor at each power pin. The power supplies are checked with voltage monitor circuits. The LED´s are not illuminated unless the voltage is within the defined range.

A new feature for revision 03 and later boards is the addition of selection headers to control the power sequencing of the 3.3V and 5V supplies. Some embedded systems reach the enumeration state very rapidly. When operating in a system with fast enumeration the no delay mode should be selected. When operation is in standard setting and reducing the in-rush on the 12V supply is desired the delay mode selection is appropriate. When a power supply is not needed for your system; the power supply can be disabled to reduce in-rush requirements. For example when the installed XMC does not use the 5V.

Three pin headers are supplied. When a shunt is installed in the delayed position the corresponding power supply is enabled based on a local timer and the 12V supply reaching an operating level. In the no delay position the power supply is enabled based on the 12V rail without the added delay. With no shunt installed the power supply is disabled. The revision 1 and 2 boards were effectively operating in the delay mode. Selection options exist to force the selection for users who do not want to be able to change the mode of operation.

The XMC specification calls out "VPWR " which can be either 12V or 5V. PCIe8LXMCX1 has FET switching and a header to allow user selection of either 12V or 5V or neither voltage to be supplied to these 8 pins [per XMC]. Build options are provided to allow "pre selected" voltages on these pins without the headers. The 12V and 5V supplied are part of the same power budget mentioned above. It is suggested the user select the rail definition most efficient for use, or alternatively based on noise the 5V will likely be quieter since it is converted on board and isolated from the 3.3V rail.

The individual pins on the Jn4 (PN4) or Jn6 connectors for each slot are accessible by either a 68 pin SCSI connector or a 64 position DIN connector. The IO are routed with matched length, impedance controlled differential traces suitable for single ended and differential operation. We recommend using our SCSI cable and the HDEterm68 breakout block with the SCSI connector. The industry standard VME IDC [DIN] connector is easy to connect to your system using DINterm64 which is a 64 position terminal strip and the DIN Ribbon Cable 64, a 64 position ribbon cable.

The XMC JTAG connections are routed to a header. Please let us know if you want this header installed. [-JTAG]

The PCIe bus does not have a concept of global addressing. A DIPSWITCH is provided to allow the user to select the Global Address on the XMC position.

PCIe4LXMCX1 Features

1/2 size PCIexpress card with 8 lanes interconnected to the XMC. 1-4 lane operation. 4+ lane connector compatible.
XMC compatible slots
1 XMC Slot provided.
Gen1 and Gen2 compatible.
Global Addressing
Supported with a user DIPSWITCH
Software Interface
Passive design with no SW requirement. XMC register definitions as defined by installed hardware.
Local power supplies provide +5(10A), +12, -12V(4A), +3V(10A) available to XMC´s with adequate +12V input current. Supplies use industrial temperature components, and spreading power planes to manage the thermal load. It is recommended to use the FAN option for high power requirement XMC´s. User selectable power supply enable{on/off, delayed, not delayed] for 3.3V and 5V supplies
PCIe4LXMCX1 has cut-outs to support increased airflow over the XMC´s component side. Optional fan(s) with two mounting positions per XMC position are available and recommended for many applications.
PCIe MSI interrupt scheme is supported
IO Interface
XMC Bezel IO supported at PCIe bracket. Jn4 / Jn6 "user IO" supported with either SCSI or DIN connectors at both positions. See Panduit for mate [120-964-455] or standard SCSI II connector.
XMC, PCIe specification compliant
+3V, +5V, 1.0V, +12V, -12V. LED´s on voltages illuminated via monitoring circuits which check that the voltages are within tolerance.
XMC JTAG connections are tied to a labeled header. Add -JTAG to part number for this option to be installed.
Statement of Volatility
TBD hours. Bellcore. GB 25c

PCIe4LXMCX1 Benefits

PCIe4LXMCX1 offers Gen1 andf Gen2 speeds. Use current and future XMC´s
Make use of existing XMC designs in PCIe applications without paying for the expense of a new design and layout. Quantity discounts are available.
Ease of Use
PCIe4LXMCX1 is easy to use. A passive design without any software requirements. The XMC installed is directly controlled via the PCIe lanes.
The standard versions are built in quantity allowing for rapid addition of "Zero Slot Fans"™ and other options. Send in your order for rapid delivery.
PCIe4LXMCX1 is a 1/2 size PCIe board which conforms to the PCIe mechanical and electrical specifications. Eliminate mechanical interference issues. PCIe4LXMCX1 can be used in all 1/2 and full length PCIe compliant slots.
XMC Compatibility
PCIe4LXMCX1 is XMC compliant per the XMC specification. All Dynamic Engineering XMC Modules are compatible with PCIe4LXMCX1. All other XMC Modules which are compliant with the XMC specification are compatible with PCIe8LXMCX1
PCIe Compatibility
PCIe4LXMCX1 is PCIe compliant. PCIe4LXMCX1 can be expected to work in any PCIe compliant backplane with 8+ lane connectors and 1/2 or full length card positions. PCIe8LXMCX1 has been tested in multiple backplanes.

Part Number: PCIe4LXMCX1
Ordering Options

  • PCIe4LXMCX1 Standard board - for a base version (PCIe4LXMCX1-DIN) and standard processing
  • -FAN( ) Need additional cooling? Order PCIe4LXMCX1-FAN( ) for a pre-installed 12V 5.2CFM fan(s) to maximize cooling and functionality of your card. The fan has been tested with high wattage PrPMC devices. Fan position 1 is closest to the PCIe bezel. Valid Fan options include: (1,1Rz), (2,2Rz), low profile fans with fan direction toward XMC or pulling air from the XMC [R]. An additional option is to use standard height fans with more LFM. 8 CFM fans are available as rear mount only (add -FAN(1,2)R to PN for this option)
  • -ROHS Use ROHS processing. Standard processing is ""leaded"
  • -CC Option to add Conformal Coating
  • -NC Order to receive a PCIe4LXMCX1 with no SCSI or DIN connectors installed.
  • -XIO Order to receive a PCIe4LXMCX1 with Jn6 installed as well as Jn4
  • -XIOExc Order to receive a PCIe4LXMCX1 with Jn6 installed exclusively [no Jn4]
  • -VPWR5V Order to receive a PCIe4LXMCX1 with VPWR forced to 5V instead of user selectable
  • -VPWR12V Order to receive a PCIe4LXMCX1 with VPWR forced to 12V instead of user selectable
  • -5VXXX Order to receive a PCIe4LXMCX1 with 5V supply forced to (replace XXX) No Delay [ND], Delay[DEL], Off[OFF] instead of user selectable
  • -3VXXX Order to receive a PCIe4LXMCX1 with 3.3V supply forced to (replace XXX) No Delay [ND], Delay[DEL], Off[OFF] instead of user selectable
  • -AP Order to receive a PCIe4LXMCX1 with the Alternate high power connector installed for supplemental power. PC standard 2 row by 3 power cable receptical. Pins1,2,3 = +12V. Pins 4,5,6 = GND.
  • Please note that the standard card without the -AP option will work in most situations. Many XMC´s fit within the "gold finger" power budget.
    If you are unsure of your power requirements, we recommend ordering with a Power Connector installed to support your future development, and eliminate the need to install at a later date.

PCIe4LXMCX1 Drivers

Software Support for PCIe4LXMCX1 is not needed. PCIe4LXMCX1 is a passive card, the drivers and application SW associated with the XMC will not need changing based on using this carrier.
Please see the XMC Driver manual for the specifics of operating the installed device.

PCIe4LXMCX1 Manuals

PCIe4LXMCX1 Hardware Design Manual Main product manual with Address and Biitmap information, example use, pinouts, specifications and more.