JST JMD 80-Position Plug — 0.50 mm Pitch, 4.5 mm Stack Height
The JST 80P-JMDSS-G-1-TF(LF)(SN) is the 80-circuit plug half of the JMD board-to-board connector series, using outer shroud contacts on a 0.020" (0.50 mm) pitch in two rows.
80 Positions at 0.50 mm — Routing Density vs Current Trade-off
Eighty circuits on a 0.50 mm pitch means each signal pair occupies about 1.0 mm of board edge per row — the footprint is dense enough that a board layout engineer needs to plan escape routing with fine traces (0.10 mm / 0.10 mm space typical) and likely a via-in-pad strategy for the inner rows. The trade-off at this pitch is per-contact current: the narrow contact beam and fine pitch limit current well below what a 1.00 mm or 2.00 mm pitch connector would carry, so this plug is a signal interconnect, not a power rail. The 80PS-JMDSS-G-1-TF is the right-angle sibling of this same plug — same 80 positions, same 0.50 mm pitch, but with a 4.80 mm mated height and a right-angle orientation that routes the cable parallel to the board instead of perpendicular.
No obsolescence notice or last-time-buy window is on record. Stock both halves or neither: the mating receptacle is the JMD series socket (not listed here), so confirm the receptacle order code against your BOM before committing the plug.