SUMIT is an electromechanical connectorization specification that enables all common serial and legacy chipset expansion busses for next generation products. It is a stackable, I/O-centric, serial expansion approach that is independent of any particular board form factor. It supports PCIe, USB, LPC, SMBus, and ExpressCard signals on a single high-speed connector. A second connector supports additional PCIe lanes.

Interface signals included in SUMIT™:

• Two x1 channels of PCI Express (including clock and card present)
• One x4 channel of PCI Express (including clock and card present)
• Three USB 2.0 channels
• One ExpressCard channel
• Two SPI/uWire channels
• LPC interface with serial IRQ support
• System Management Bus (SMBus)/I2C with SMD Alert
• Reset and Wake On LAN (WAKE)

The SUMIT™ standard specifies Samtec's Q2 QMS/QFS Series in a one bank (52 pin) orientation for module stacking. Samtec specifically designed the QMS/QFS Series with a 15.24mm stack height for top and bottom board stacking. Q2 has triple the wipe of many high speed mezzanine interconnects making it appropriate for rugged applications.

• ASP-129637-01 - QMS Series (Male)
• ASP-129646-01 - QFS Series (Female)

Samtec also offers precision machined standoffs to limit the impact of tolerance stack up issues in stackable embedded applications.

SO-1524-03-01-02-L – 15.24mm standoff

Samtec is a member of SFF-SIG. For more information on SFF-SIG, please click here.