schematic: add ESD protection on USB

hardware/geda/symbols/USBLC6-2SC6.sym

@@ -0,0 +1,91 @@
+v 20150930 2
+T 0 0 5 8 0 0 0 0 1
+datasheet=https://www.st.com/resource/en/datasheet/usblc6-2.pdf
+T 0 0 5 8 0 0 0 0 1
+footprint=SOT95P280X145-6N.fp
+B 400 2100 1800 -1700 3 0 1 0 -1 -1 0 -1 -1 -1 -1 -1
+H 3 0 0 0 -1 -1 0 -1 -1 -1 -1 -1 5
+M 1140 1300
+L 1300 1200
+L 1140 1100
+L 1140 1300
+z
+H 3 0 0 0 -1 -1 0 -1 -1 -1 -1 -1 5
+M 1460 1300
+L 1300 1200
+L 1460 1100
+L 1460 1300
+z
+L 1300 1300 1300 1100 3 0 1 0 -1 -1
+L 1300 1300 1220 1380 3 0 1 0 -1 -1
+L 1300 1100 1380 1020 3 0 1 0 -1 -1
+P 0 1400 400 1400 1 0 0
+{
+T 480 1400 9 8 1 1 0 0 1
+pinlabel=IO1_1
+T 480 1400 5 8 0 0 0 2 1
+pintype=pas
+T 320 1400 5 8 1 1 0 6 1
+pinnumber=1
+T 320 1400 5 8 0 0 0 8 1
+pinseq=1
+}
+P 0 1000 400 1000 1 0 0
+{
+T 480 1000 9 8 1 1 0 0 1
+pinlabel=IO2_1
+T 480 1000 5 8 0 0 0 2 1
+pintype=pas
+T 320 1000 5 8 1 1 0 6 1
+pinnumber=3
+T 320 1000 5 8 0 0 0 8 1
+pinseq=3
+}
+P 2600 1400 2200 1400 1 0 0
+{
+T 2120 1400 9 8 1 1 0 6 1
+pinlabel=IO1_2
+T 2120 1400 5 8 0 0 0 8 1
+pintype=pas
+T 2280 1400 5 8 1 1 0 0 1
+pinnumber=6
+T 2280 1400 5 8 0 0 0 2 1
+pinseq=6
+}
+P 2600 1000 2200 1000 1 0 0
+{
+T 2120 1000 9 8 1 1 0 6 1
+pinlabel=IO2_2
+T 2120 1000 5 8 0 0 0 8 1
+pintype=pas
+T 2280 1000 5 8 1 1 0 0 1
+pinnumber=4
+T 2280 1000 5 8 0 0 0 2 1
+pinseq=4
+}
+P 1300 2500 1300 2100 1 0 0
+{
+T 1300 2020 9 8 1 1 90 6 1
+pinlabel=VBUS
+T 1300 2020 5 8 0 0 90 8 1
+pintype=pwr
+T 1300 2180 5 8 1 1 90 0 1
+pinnumber=5
+T 1300 2180 5 8 0 0 90 2 1
+pinseq=5
+}
+P 1300 0 1300 400 1 0 0
+{
+T 1300 480 9 8 1 1 90 0 1
+pinlabel=GND
+T 1300 480 5 8 0 0 90 2 1
+pintype=pwr
+T 1300 320 5 8 1 1 90 6 1
+pinnumber=2
+T 1300 320 5 8 0 0 90 8 1
+pinseq=2
+}
+T 400 2160 5 10 1 1 0 0 1
+refdes=D?
+T 1360 340 9 10 1 1 0 2 1
+device=USBLC6-2SC6