+C 75400 66200 1 0 0 UBLOX-MAX.sym
+{
+T 75795 71495 5 10 1 1 0 0 1
+refdes=U10
+T 76895 70795 5 10 1 1 0 0 1
+device=U-Blox MAX
+T 75400 66200 5 10 0 1 0 0 1
+footprint=UBLOX-MAX
+}
+N 77400 66000 77400 66200 4
+N 77400 66100 77800 66100 4
+N 77800 66100 77800 66200 4
+N 77400 66100 77000 66100 4
+N 77000 66100 77000 66200 4
+C 80000 70300 1 0 0 gnd.sym
+T 81600 72000 9 10 1 0 0 0 2
+u-blox suggests L5 be
+Murata LQG15HS27NJ02
+T 73000 65500 9 10 1 0 0 0 6
+v_charge can be 4.2 volts
+v_bckp must be 1.4 - 3.6 volts
+i_bckp on the order of 22uA
+
+56k should drop 1.232 volts,
+and consume 27 microwatts
+C 74600 67100 1 180 0 resistor.sym
+{
+T 74300 66700 5 10 0 0 180 0 1
+device=RESISTOR
+T 73700 67200 5 10 1 1 0 0 1
+refdes=R32
+T 74300 67200 5 10 1 1 0 0 1
+value=56k
+T 74600 67100 5 10 0 1 180 0 1
+footprint=0402
+T 74600 67100 5 10 0 1 180 0 1
+vendor=digikey
+T 74600 67100 5 10 0 1 180 0 1
+vendor_part_number=RHM56.0KLCT-ND
+T 74600 67100 5 10 0 1 90 0 1
+loadstatus=smt
+}
+N 74600 67000 75400 67000 4
+C 73800 70500 1 0 0 resistor.sym
+{
+T 74100 70900 5 10 0 0 0 0 1
+device=RESISTOR
+T 74150 70950 5 10 1 1 180 0 1
+refdes=R33
+T 73795 70500 5 10 0 1 0 0 1
+footprint=0402
+T 74300 70800 5 10 1 1 0 0 1
+value=3.3k
+T 73800 70500 5 10 0 1 270 0 1
+vendor_part_number=311-3.30KLRCT-ND
+T 73800 70500 5 10 0 0 270 0 1
+vendor=digikey
+T 73800 70500 5 10 0 1 270 0 1
+loadstatus=smt
+}
+N 73800 70600 73800 70200 4
+T 71500 70800 9 10 1 0 0 0 9
+don't drive reset_n high!
+
+mcp130t is open drain
+with 5k internal pull-up
+
+do we really want 3.3k
+pull-up here? unclear!
+
+don't use reset_n at all?