1.00 mm Pitch Mezzanine Plug for IEEE 1386 PMC Cards
The TE Connectivity 5146888-1 is a 64-position plug from the Free Height (FH) series, designed to the IEEE 1386 / PMC mezzanine card standard. It uses a 0.039" (1.00mm) pitch on two rows of center strip contacts, which keeps the board footprint tight for a 64-bit parallel bus. The connector is surface-mount only, with a board guide built into the housing to align the plug during card insertion — without that guide, the fine-pitch contacts can skew on mate. The plug accepts mated stacking heights of 10mm, 12mm, 13mm, or 15mm, which means one board layout can serve different card-to-carrier spacing by swapping the mating receptacle height alone.
Stack Height Selection and Board Spacing
The 5146888-1 plug itself has a height above board of 0.329" (8.35mm). When mated with the corresponding Free Height receptacle, the total stack height falls into one of four options: 10mm, 12mm, 13mm, or 15mm. The actual height depends on the receptacle's own board standoff, not the plug. The plug is the same across all four — only the receptacle changes.
Comparing the 64-Position 5146888-1 with the 84-Position 1-120532-2
The 1-120532-2 is the 84-position sibling in the same Free Height IEEE 1386 family, sharing the same 1.00mm pitch, SMT mounting, and gold-plated center strip contacts. The two parts differ in three ways that matter for selection. First, position count: 84 circuits vs 64, so the 1-120532-2 fits a wider PMC bus or more I/O lines. Third, height above board: 0.250" (6.35mm) on the 84-position part versus 0.329" (8.35mm) on the 64-position, which changes the available stack height range. Both are active parts; neither is a drop-in replacement for the other because the footprint and board keep-out zones differ with the position count.
For BOM planning, the 64-position count and 1.00mm pitch are the critical fit checks; the mating half is the corresponding Free Height receptacle in the desired stack height.