The 54150-0878 is a 80-way 2-row surface mount vertical SlimStack? Receptacle with gold-plated phosphor bronze contacts and solder tabs. The 54150 series fine-pitch SMT board-to-board connector with speeds up to 20Gbps and pitch sizes ranging from 0.35 to 1.00mm is suitable for board-to-board and signal applications. It is ideal for tight-packaging applications such as mobile phones, SlimStack? fine-pitch connectors offer a wide selection of low-profile, narrow width options in various stack heights and circuit sizes for space savings and design flexibility. It mates with 53949 plug.