* SPICE netlist
C10 IN2 0 4p
XU2 N001 N001 N001 N010 N011 N012 N013 0 NC_01 NC_02 NC_03 IN2 N009 N001 N003 NC_04 LTC6561 ;pnba Vcco)chsel0)Vcc)Vref1)Vref2)Vref3)Vref4)Gnd)In1)In2)In3)In4)O_Mux)chsel1)Out)OutTerm
V1 N001 0 5
C1 N002 0 1
C2 N004 0 1
C3 N005 0 1
C4 N006 0 1
C5 IN1 0 4p
XU1 N001 0 N001 N002 N004 N005 N006 0 IN1 NC_05 NC_06 NC_07 N007 0 N003 NC_08 LTC6561 ;pnba Vcco)chsel0)Vcc)Vref1)Vref2)Vref3)Vref4)Gnd)In1)In2)In3)In4)O_Mux)chsel1)Out)OutTerm
R2 OUT N003 50
A1 N008 0 0 0 0 N009 N007 0 BUF Ref=.5 Trise=1n Vlow=0 Vhigh=5
V4 N008 0 PWL(0 0 50n 0 +.1n 1)
I3 IN1 0 PULSE(0 30u 1.5n .1n .1n 6.5n 300n)
I4 IN2 0 PULSE(0 20u 100n .1n .1n 6.5n 300n)
R3 OUT 0 50
C6 N010 0 1
C7 N011 0 1
C8 N012 0 1
C9 N013 0 1
.tran 200n

* LTspice schematic (.asc)
Version 4
SHEET 1 1552 1664
WIRE 408 -832 120 -832
WIRE 536 -832 408 -832
WIRE 600 -832 536 -832
WIRE 600 -816 600 -832
WIRE 120 -800 120 -832
WIRE 408 -800 408 -832
WIRE -200 -752 -776 -752
WIRE 8 -752 -200 -752
WIRE -776 -736 -776 -752
WIRE -200 -736 -200 -752
WIRE 600 -720 600 -736
WIRE -88 -672 -104 -672
WIRE 8 -672 -24 -672
WIRE -200 -656 -200 -672
WIRE -776 -640 -776 -656
WIRE 600 -592 504 -592
WIRE 632 -592 600 -592
WIRE 776 -592 712 -592
WIRE 776 -576 776 -592
WIRE -88 -512 -104 -512
WIRE 8 -512 -24 -512
WIRE 776 -480 776 -496
WIRE -88 -352 -104 -352
WIRE 8 -352 -24 -352
WIRE -88 -192 -104 -192
WIRE 8 -192 -24 -192
WIRE 120 -112 120 -128
WIRE 216 -112 216 -128
WIRE 312 -112 312 -128
WIRE 408 -32 408 -128
WIRE 408 -32 -24 -32
WIRE -296 -16 -344 -16
WIRE -88 -16 -216 -16
WIRE 568 0 -24 0
WIRE -88 48 -88 16
WIRE 408 96 120 96
WIRE 536 96 536 -832
WIRE 536 96 408 96
WIRE 120 112 120 96
WIRE 408 112 408 96
WIRE -88 240 -104 240
WIRE 8 240 -24 240
WIRE 600 320 600 -592
WIRE 600 320 504 320
WIRE -88 400 -104 400
WIRE 8 400 -24 400
WIRE -88 560 -104 560
WIRE 8 560 -24 560
WIRE -184 640 -728 640
WIRE 8 640 -184 640
WIRE -728 656 -728 640
WIRE -184 656 -184 640
WIRE -88 720 -104 720
WIRE 8 720 -24 720
WIRE -184 736 -184 720
WIRE -728 752 -728 736
WIRE 120 800 120 784
WIRE 216 800 216 784
WIRE 312 800 312 784
WIRE 312 800 216 800
WIRE 536 800 536 96
WIRE 536 800 312 800
WIRE 408 832 408 784
WIRE 568 832 568 0
WIRE 568 832 408 832
FLAG -728 640 IN2
FLAG -184 736 0
FLAG 120 -112 0
FLAG 600 -720 0
FLAG -104 -672 0
FLAG -104 -512 0
FLAG -104 -352 0
FLAG -104 -192 0
FLAG 216 -112 0
FLAG 312 -112 0
FLAG 776 -592 OUT
FLAG -776 -752 IN1
FLAG -200 -656 0
FLAG -88 48 0
FLAG -344 -16 0
FLAG -776 -640 0
FLAG -728 752 0
FLAG 120 800 0
FLAG 776 -480 0
FLAG -104 240 0
FLAG -104 400 0
FLAG -104 560 0
FLAG -104 720 0
SYMBOL cap -200 656 R0
SYMATTR InstName C10
SYMATTR Value 4p
SYMBOL LTC6561 264 416 R0
SYMATTR InstName U2
SYMBOL voltage 600 -832 R0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL cap -24 -688 R90
SYMATTR InstName C1
SYMATTR Value 1
SYMBOL cap -24 -528 R90
SYMATTR InstName C2
SYMATTR Value 1
SYMBOL cap -24 -368 R90
SYMATTR InstName C3
SYMATTR Value 1
SYMBOL cap -24 -208 R90
SYMATTR InstName C4
SYMATTR Value 1
SYMBOL cap -216 -736 R0
SYMATTR InstName C5
SYMATTR Value 4p
SYMBOL LTC6561 264 -496 R0
SYMATTR InstName U1
SYMBOL res 728 -608 R90
SYMATTR InstName R2
SYMATTR Value 50
SYMBOL digital\\buf -88 -80 R0
SYMATTR Value Ref=.5
SYMATTR Value2 Trise=1n
SYMATTR SpiceLine2 Vlow=0 Vhigh=5
SYMATTR InstName A1
SYMBOL voltage -200 -16 R90
SYMATTR InstName V4
SYMATTR Value PWL(0 0 50n 0 +.1n 1)
SYMBOL current -776 -736 R0
SYMATTR Value PULSE(0 30u 1.5n .1n .1n 6.5n 300n)
SYMATTR InstName I3
SYMBOL current -728 656 R0
SYMATTR Value PULSE(0 20u 100n .1n .1n 6.5n 300n)
SYMATTR InstName I4
SYMBOL res 760 -592 R0
SYMATTR InstName R3
SYMATTR Value 50
SYMBOL cap -24 224 R90
SYMATTR InstName C6
SYMATTR Value 1
SYMBOL cap -24 384 R90
SYMATTR InstName C7
SYMATTR Value 1
SYMBOL cap -24 544 R90
SYMATTR InstName C8
SYMATTR Value 1
SYMBOL cap -24 704 R90
SYMATTR InstName C9
SYMATTR Value 1