M.2 Interposer


M.2 is a specification supporting specifically keyed modules of different lengths that facilitate the addition or expansion of functions via a small form factor. The PCIe M.2 form factor is typically used for PCIe adaptation and small form factor NVMe SSD’s. SerialTek’s M.2 interposer supports all relevant keys, link-widths, and sidebands, including SMBus (e.g., NVMe-MI) from the host or from external / third-party injection or generation tools. SerialTek’s PCIe Gen4 M.2 Interposers with SI-Fi technology are specially designed test adapters that are physically placed in between the M.2 port and an M.2 endpoint to intercept and relay a copy of the high-speed signaling and discrete data lines to the Kodiak PCIe Analysis system in real-time.

M.2 Interposer Overview


  • Dimensions: 154 mm(W) x 34 mm(H) x 232 mm(L) (6 x 1.3 x 9”)
  • Power connector: Molex 87427-0602
  • Analyzer connectors: 2x SFF-8644
  • Device connector: M.2 Socket 3, Key M, 22110, 2280, 2260, 2242, 2230
  • Host module connectors: 2x MCIO 38 pin
  • SMBUS injection connector: 2×5 pin 0.1” header, 3.3 Vdc
  • REFCLK output connectors: 2x U.FL, AC coupled LPHCSL
  • REFCLK output control connector: 2 pin 0.1” header, 3.3 Vdc
  • REFCLK buffer control connector: 3 pin 0.1” header, 3.3 Vdc
  • Sideband signal access connector: 2×9 pin 0.1” header, 3.3 Vdc

M.2 Interposer Sideband Signals


  • GND
  • DEVSLP
  • SUSCLK
  • MFG_DATA
  • MFG_CLOCK
  • 3V3 PCIE HOST
  • INPUT_1
  • INPUT_2
  • INPUT_3
  • LED
  • SMB_CLK
  • SMB_DAT
  • ALERT#
  • PERST#
  • CLKREQ#
  • PEWAKE#
  • PEDET

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