VPX8LXMC3U

VPX8LXMC3U ( VPX 8 Lane XMC 3U 1 position) adapter / carrier converter card provides the ability to install one XMC card into a standard VPX position. Up to 8 PCIe lanes can be used. Gen1-3. Built in Minus 12V supply. User selection for VPWR [5V or 12V] Hi capacity planes for 12V, 5V, and 3.3V. Industrial temperature components. Bezel and Rear IO supported. Internal thermal planes and option for Wedge Lock mounting in conduction cooled applications. Special low jitter clock circuit provided to allow operation with REF CLK [SSC mode] or local clock for NSSC mode. Available now.

P0/J0 on the VPX device provides Power, JTAG, REF CLK, PERST and miscellaneous signals . The JTAG signals are are routed to the XMC [J05]. The 12V rail is used to generate the -12V.

The power supply design utilizes a switching regulator controlling an N channel MOSFET. An LC filter insures clean power at the XMC device. The single connection on J05 will be the limiting factor for the -12V as the supply and filters are over-buiit.

The VPX supplied +12, 5, and 3.3 are bipassed with .1 uF per pin plus 10 uF per rail to supply the XMC . In addition the VPWR rail is supplied by either the 5V or 12V with user selection via FET´s and a three pin header. 20 uF of bulk and .1 uF per pin are provided on the VPWR rail. An ordering option to remove the header and hard select the VPWR voltage is offered.

The XMC installed onto VPX8LXMC3U is interconnected with the PCIe lanes from the J1 connections. Matched length, 100 ohm differential pair routing techniques are employed to allow for trouble free operation. Your VPX system can use spread spectrum clocking, and the built in clocking options allows REF CLK [25 MHz with SSC] or the local NSSC reference clock to be used. Two high precision low jitter clock sources are provided - REF CLK is used with one and an industrial temp crystal on the other. A high speed PCIe clock mux is used to select which reference to use in your application. Shunt controlled.

The PCB is designed for conduction cooling with a 2 oz. "rib plane" tied to the wedge locks and thermal contacts for the XMC. The "-CC"wedge lock option includes the thermal frame between the XMC and VPX8LXMC3U and the wedge locks. Standard models

The Rear IO (J2) connector is carefuly routed to J04 and J06 with options for installing either, neither or both. 100 ohm differential routing with matched length traces. Boards without RIO are supplied without J2.

Alignment guides are supplied to make sure of correct installation. No keying is provided. The alignment guides can be replaced with keyed versions.