bb/tg.py

   1 # Transmission gate, implemented with CD4016
   2
   3 nodes = ("IN_OUT", "OUT_IN", "CONTROL")
   4
   5 # Quad transmission gate IC
   6 parts_generated = "CD4016"
   7 parts_consumed = ["M1", "M2", "M3", "M4", "M5", "M6"]
   8 parts_kept = []
   9
  10 # Based on http://www.cedmagic.com/tech-info/data/cd4016.pdf
  11 pins = [
  12         { "IN_OUT": ("CD4016", 1), "OUT_IN": ("CD4016", 2), "CONTROL": ("CD4016", 13) }, # SW A
  13         { "IN_OUT": ("CD4016", 4), "OUT_IN": ("CD4016", 3), "CONTROL": ("CD4016", 5) },  # SW B
  14         { "IN_OUT": ("CD4016", 8), "OUT_IN": ("CD4016", 9), "CONTROL": ("CD4016", 6) },  # SW C
  15         { "IN_OUT": ("CD4016",11), "OUT_IN": ("CD4016",10), "CONTROL": ("CD4016",12) },  # SW D
  16        ]
  17
  18 global_pins = { "$G_Vdd": ("CD4016", 14), "$G_Vss": ("CD4016", 7) }