This adapter allows a SOIC-28 Wide (300 mil body, 0.050"/1.27mm pitch) footprint on a motherboard to be soldered to and wired out to DIP-28 plated through holes above, for easy probing and debugging access, or for replacement with a DIP IC. SPECIFICATIONS: PCB dimensions: 0.4 x 1.4 x 0.063 inches. PCB construction: FR-4 UL94V-0. PCB operating temperature range: -40C to +130C. PCB reflow maximum temperature: +260C. PCB Assembly standard: IPC-A-610 Class II. Top side of board fits DIP-28 IC. Bottom side of PCB has SMD pads for the SMD-SMD header that converts to a SOIC-28W footprint. This adapter comes with our HDR-SOICW headers cut to size and pre-installed on the bottom: P/N: HDR-SOICW-80