FMC/FMC+ Standard Connectors

Silicon Development Solutions


FMC Standard

The FPGA Mezzanine Card (FMC) was developed and ratified by a consortium of FPGA vendors and end-user members of the VITA 57 working group. FMC is an ANSI standard which defines a compact electro-mechanical expansion interface for a daughter card to an FPGA baseboard or other device with re-configurable I/O capability.

The FMC Standard is essential for FPGA vendors making baseboards and comprehensive development kits to enable Designers to accelerate their application development. FMC products are continually introduced by Supplier companies for targeted market specific applications in industries such as Datacom, Broadcast, Aerospace/Defense, Industrial and Instrumentation. Click here for more information about I/O Design Flexibility with FMC.

FMC Interconnect

VITA standards specify configurations for the VITA 57.4 FPGA Mezzanine Card Plus (FMC+) connector, and the VITA 57.1 FPGA Mezzanine Card (FMC) connector:

FMC+ (VITA 57.4)
  • High Serial Pin Connector (HSPC) with 560 pins (provides 24 GT interfaces)
  • High Serial Pin Connector extension (HSPCe) with 80 pins (provides additional 8 GT interfaces; this connector is optional)
FMC (VITA 57.1)
  • High Pin Count (HPC) 400 I/O high-speed array system
  • Mechanically compatible Low Pin Count (LPC) 160 I/O can also be used with any of the form factors detailed in the standard

The FMC+ and FMC connectors are Application Specific Product (ASP) versions of Samtec's SEARAY™ High-Speed Array system. These FMC connectors are available direct from Samtec and are scalable to high-performance applications as your hardware development effort demands.

Click here for a listing of Samtec FMC Interconnects.

FMC Interconnect Selector

Below is a matrix of Samtec FMC+ and FMC interconnect options available for the FPGA Baseboards and Mezzanine Cards. All Samtec board level interconnects and high-speed cable assemblies listed are available direct from Samtec with no Minimum Order Quantity.

FMC+ Connector Options

Building on FMC, FMC+ employs a larger connector from the SEARAY™ family of high-speed, high-density arrays.  This High Serial Pin Connector (HSPC) has 560 pins arranged in a 14x40 array.  While new FMC+ cards can only plug into new FMC+ carriers due to their larger connectors, original FMC cards will also fit thanks to a customized polarization system providing true backward compatibility.

The FMC+ Standard increases the number of multi-gigabit interfaces from 10 to 24.  In addition, there is an optional extension connector (the High Serial Pin Connector extension, or HSPCe) to boost pin-count by 80 positions, arranged in a 4x20 array. This brings the maximum multi-gigabit interfaces to 32 full duplex channels.  Throughput per multi-gigabit interface has increased to 28 Gbps in each direction.

VITA 57.4, FMC+ Connector – FPGA Baseboard Side Connector
ASP-184329-01 FMC+ Connector, 560 I/O, female
ASP-186899-01 FMC+ Connector, extension, 80 I/O, female (optional)
VITA 57.4, FMC+ Connector – Mezzanine Card Side Connector
ASP-184330-01 FMC+ Connector, 560 I/O, male 10 mm
ASP-188588-01 FMC+ Connector, 560 I/O, male 8.50 mm
ASP-186900-01 FMC+ Connector, extension, 80 I/O, male (optional) 10 mm
ASP-196174-01 FMC+ Connector, extension, 80 I/O, male (optional) 8.50 mm

FMC Connector Options

The (LPC) connectors provide 68 user-defined, single ended signals (or 34 user-defined, differential pairs); (HPC) connectors provide 160 user-defined, single ended signals (or 80 user- defined, differential pairs), 10 serial transceiver pairs and additional clocks; (HPC) and (LPC) use the same mechanical connector body - the only difference is which signals are actually populated. Thus, cards with (LPC) connectors can be plugged into (HPC) sites, and if properly designed, (HPC) cards can offer a subset of functionality when plugged into an (LPC) site.

FPGA Baseboard Side Connector Options
ASP-134486-01 FMC Connector, lead free, (HPC), 400 I/O, female
ASP-134603-01 FMC Connector, lead free, (LPC), 160 I/O, female
Mezzanine Card Side Connector Options
ASP-134488-01 FMC Connector, lead free, (HPC), 400 I/O, male 10 mm
ASP-134602-01 FMC Connector, lead free, (HPC), 400 I/O, male 8.50 mm
ASP-134604-01 FMC Connector, lead free, (LPC), 160 I/O, male 10 mm
ASP-134606-01 FMC Connector, lead free, (LPC), 160 I/O, male 8.50 mm

HDR Cable Assembly Options for FMC

* Other cable lengths available; contact

HDR-153514-01 HDR-153514-02 300 mm*
550 mm*
High Data Rate Cable, (HPC) female to (HPC) male ASP-134486-01 ASP-134488-01 Same Side
HDR-169468-01 HDR-169468-02 300 mm*
550 mm*
High Data Rate Cable, (HPC) female to (HPC) male ASP-134486-01 ASP-134488-01 Opposite Side
HDR-169470-01 HDR-169470-02 300 mm*
550 mm*
High Data Rate Cable, (HPC) male to (HPC) male ASP-134488-01 ASP-134488-01 Same Side
HDR-169472-01 HDR-169472-02 300 mm*
550 mm*
High Data Rate Cable, (LPC) female to (LPC) male ASP-134603-01 ASP-134604-01 Same Side
HDR-169473-01 HDR-169473-02 300 mm*
550 mm*
High Data Rate Cable, (LPC) female to (LPC) male ASP-134603-01 ASP-134604-01 Opposite Side
HDR-169475-01 HDR-169475-02 300 mm*
550 mm*
High Data Rate Cable, (LPC) male to (LPC) male ASP-134604-01 ASP-134604-01 Same Side


Xilinx® and its Alliance Program Members offer the industry's most comprehensive offering of FPGA Development Boards and Design Services to help speed developer’s time-to-revenue over a wide variety of application needs. Xilinx® has selected Samtec High Speed Connector and Cable interconnect Solutions for their latest generation Evaluation Boards featuring the Kintex UltraScale and Virtex UltraScale FPGA’s.


Altera® development kits provide a complete, high-quality design environment for engineers. They simplify the design process and reduce time to market. Altera® has selected Samtec High Speed interconnect solutions for many of their Boards and Kits.

Altera Arria® 10 FPGA Development Board

Samtec Products on FPGA Baseboard:

Altera Arria® 10 FPGA Signal Integrity Kit

Samtec Products on FPGA Baseboard:

Altera® HSMC

The Altera® HSMC defines electrical and mechanical properties of a high speed mezzanine card interface. This specification standardizes the way in which mezzanine cards communicate and connect to host boards. By taking advantage of the high- performance I/O features found in today’s FPGA devices, manufacturers can build a single mezzanine card that will then interface to multiple host boards.

Similarly, they can build a host board that can leverage many different, pre-built, mezzanine cards. The HSMC connectors defined by the specification are based on the 0.50 mm pitch Q Strip® QSH/QTH series high speed board-to-board connectors from Samtec. The Samtec interconnect for the mezzanine card is ASP-122952-01. See the complete HSMC Specification from Altera for further information and recommendations for running both high-frequency and low speed interface signals within the various “banks."

High-Speed Cable Assemblies to Interface with HSMC Connectors:

Custom HDR cable assemblies for HSMC are available in various lengths with a variety of terminal/socket end options and orientations.

Altera Arria V GX FPGA Development Board

Samtec Products on FPGA Baseboard:


Microsemi provides a selection of development kits & boards for FPGA and SoC FPGA designs that include Libero SoC design software, power, and Programming & Debug Tools to begin your next design.

Microsemi PolarFire Evaluation Kit

This kit is ideally suited for high-speed transceiver evaluation, 10Gb Ethernet, IEEE1588, JESD204B, SyncE, SATA and more. The kit connections include a high pin count (HPC) FPGA mezzanine card (FMC), numerous SMAs, PCIe, Dual Gigabit Ethernet RJ45, SFP+ and USB. 

Samtec product on kit:

Microsemi SmartFusion2 Advanced Development Kit

The Advanced Development Kit board has standard and advanced peripherals such as PCIe®x4 edge connector, two FMC connectors for using many off the shelf daughter cards, USB, Philips inter-integrated circuit (I2C), two gigabit Ethernet ports, serial peripheral interface (SPI), and UART. A high precision operational amplifier circuitry on the board helps to measure core power consumption by the device.

Samtec product on kit:


The Expanding FMC Ecosystem

As FMC leverages open platforms and standards, developers are working to further the adaptation of programmable device technologies in the marketplace. Many of these developers are working closely with Samtec to support a variety of applications, including:

  • FMC daughter cards / modules
  • FPGA-based development boards with provisions for FMC expansion
  • FPGA-based networking cards with provisions for FMC expansion, along with optical interfaces
  • FPGA-based characterization platforms with provisions for FMC expansion
  • Embedded systems such as networking development bridge cards

Available from Samtec, some of the key interconnect solutions being used to support these technologies include:

Analog Devices AD-FMCDAQ2-EBZ Evaluation Board

The AD-FMCDAQ2-EBZ is an FMC board for the high speed DAC AD9144 & ADC AD9680. It can be connected to the Xilinx KCU105 FPGA Baseboard to provide a comprehensive platform for rapid prototyping of high performance digital signal procession applications with wideband analog data acquisition.

Samtec Products:

  • VITA 57.1 FMC (HPC) 400 I/O Male Connector (SEARAY™ ASP-134488-01)


Fidus Systems and inrevium's next generation Xilinx® targeted FPGA Mezzanine Card (FMC) utilizes MACOM’s 12G-SDI Chipset to enable 4K60p video.

Samtec Products:

Avnet MicroZed™

Avnet's MicroZed™ provides easy access to the full 108 user I/O available from the MicroZed™ SOM while connecting 75 of the MicroZed™ Programmable Logic (PL) I/O to a LPC VITA 57 FMC expansion slot.

Samtec Products:

  • VITA 57.1 FMC (LPC) 160 I/O Female Connector (SEARAY™ ASP-134603-01)

TechwaY TigerFMC

VITA 57.1 compliant mezzanine card integrates 10 full duplex 10 Gbps optical links for 200 Gbps aggregate bandwidth.

Samtec Products:

  • VITA 57.1 FMC (HPC) 400 I/O Male Connector (SEARAY™ ASP-134488-01)
  • High Speed Edge Card Connector Sets (FireFly™ Connector System UEC5 / UCC8 Series)
  • x12 Bidirectional (12 Tx / 12 Rx) Optical MT Driver (FireFly™ Optical Micro Flyover System™ ECUO Series)

ASIC Development Systems

ASIC Development Systems (not FMC based, contact Samtec for more info)

Samtec interconnect solutions have been chosen by several developers for use in their FPGA-based ASIC development systems. These solutions are an integral part of the companies’ interconnect strategies to manage the high speed serial transceiver I/Os over mezzanine connections (SEARAY™) and high speed cable assemblies.

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Synopsys® | HAPS-DX & HAPS-70 Series Prototyping System

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