OrCAD PSpice. Анализ электрических цепей

+ DtoA3="DtoA_STD" DtoA4="DtoA_STD"

+ tswhl1=1.373ns tswlh1=3.382ns

+ tswhl2=1.346ns tswlh2=3.424ns

+ tswhl3=1.511ns tswlh3=3.517ns

+ tswhl4=1.487ns tswlh4=3.564ns

+ DIGPOWER="DIGIFPWR"

+ )

.model 10 STD ОС uio (

+ drvh = 1MEG drv1 = 104

+ AtoD1="AtoD_STD" AtoD2="AtoD_STD_NX"

+ AtoD3="AtoD_STD" AtoD4="AtoD_STD_NX"

+ DtoA1="DtoA_STD_OC" DtoA2="DtoA_STD_OC"

+ DtoA3="DtoA_STD_OC" DtoA4="DtoA_STD_OC"

;tsw values measured with 33 0 ohm pull up

+ tswhl1=2.617ns tswlh1=1.432ns

+ tswhl2=2.598ns tswlh2=1.460ns

+ tswhl3=2.747ns tswlh3=1.589ns

+ tswhl4=2.732ns tswlh4=1.615ns

+ DIGPOWER="DIGIFPWR"

+ )

7400 стандартная подсхема AtoD

.subckt AtoD STD A D DPWR DGND params; CAPACITANCES

CO A DGND D074 DGTLHET IO_STD

C1 A DGND {CAPACITANCE=0.1pF}

DO DGND a D74CLMP

D 1 2 D74

D2 2 DGND D74

R1 DPWR 3 4k

Q1 1 3 A 0 Q74 ; substrate should be DGND

.ends

.subckt AtoD_STD_NX A D DPWR DGND params: CAPACITANCE = 0

CO A DGND D074_NX DGTLNET = D IO_STD

C1 A DGND {CAPACITANCE+0.1pF}

D0 DGND a D74CLMP

D1 1 2 D74

D2 2 DGND D74

R1 DPWR 3 4k

Q1 1 3 A 0 Q74 ; substrate should be DGNC

.ends

7400 стандартная подсхема DtoA

.subckt DtoA_STD D A DPWR DGND

+ params: DRVL=0 DRVH=0 CAPACITANCE=0

M1 A DGND DPWR DIH74 DGTLNET=DIO_STD

C1 A DGND {CAPACITANCE=0.1pF}

.ends

7400 подсхема DtoA с открытым коллектором

.subckt DtoA_STD_OC D A DPWR DGND

+ params: DRVL=0 DRVH=0 CAPACITANCE=0

N1 A DGND DPWR DIN74_ОС DGTLNET=D IO_STD_OC

C1 A DGND {CAPACITANCE=0.1pF}

.ends

7400 Модели цифровых входов/выходов (I/O)

.model DIN74 dinput (

+ s0name="0" s0tsw=3.5ns s0rlo=7.13 s0rhi = 389 ; 7ohm, 0.09v

+ s1name ="1" s1tsw=5.5ns s1rlo = 467 s1rhi = 200; 140ohm, 3.5v

+ s2name="X" s2tsw=3.5ns s2rlo=42.9 s2rhi = 116 ;31.3011m, 1.35v

+ s3name="R" s3tsw=3.5ns s3rlo=42.9 s3rhi = 116 ; 31.3ohm, 1.35v

+ s4name="F" s4tsw=3.5ns s4rlo=42.9 s4rhi=116 ; 31.3ohm, 1.35v

+ s5name="Z" s5tsw=3.5ns s5rlo=200K s5rhi=200K

+ )

.model DIN74_OC dinput (

+s0name="0" s0tsw=3.5ns s0rlo=7.13 s0rhi=389 ; 7ohm, 0.09v

+ s1name="l" s1tsw=5.5ns s1rlo=200K s1rhi=200K

+ s2name="X" s2tsw=3.5ns s2rlo=42.9 s2rhi = 116 ;31.3ohm, 1.35v

+ s3name="R" s3tsw = 3.5ns s3rlo = 42.9 s3rhi = 116; 31.3011m, 1,35v

+ s4name="F" s4tsw = 3.5ns s4rlo = 42.9 s4rhi = 116 ; 31.3ohm, 1.35v

+ s5name="Z" s5tsw=5.5ns s5rlo=200K s5rhi=200K

+ )

.model D074 doutput (

+ s0narae="X" s0vlo = 0 .8 s0vhi=2.0

+ s1name="0" s1vlo = -1.5 s1vhi = 0.8

+ s2name="R" s2vlo=0.8 s2vhi = 1.4

+ s3name="R" s3vlo=1.3 s3vhi=2.0

+ s4name="X" s4vlo=0.8 s4vhi=2.0

+ s5name="1" s5vlo=2.0 s5vhi=7.0

+ s6name="F" s6vlo=1.3 s6vhi=2.0

+ s7name="F" s7vlo=0.8 s7vhi=1.4

+ )