4 layers160 × 161.8 mm

Acquisition board
open-ephys/oe-acquisition-board-gen3
3rd Generation Open Ephys USB Acquisition Board
360 parts1
Boards in 2 GitHub repositories, designed in KiCad, that use the TMUX136RSER by Texas Instruments (-40℃~+125℃ 1.6pF 100ps 2 2.3V~4.8V 2:1 5.7Ω 6.1GHz UQFN-10(1.5x2) Analog Switches, Multiplexers ROHS). See how each wires it, with its parts, size, README and files; the TMUX136RSER’s symbol, footprint and pinout are on its own page.

open-ephys/oe-acquisition-board-gen3
3rd Generation Open Ephys USB Acquisition Board

vl9i/spe-converter
Open-Source SPE-to-Ethernet converter board with SFP, RJ45, H-MTD and MATEnet