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OrCAD used release
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ST1843 PSpice macromodel had been developed by using Cadence OrCAD v17.4-2019 S007 
Windows SPB 64-bit Edition.



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Install and Use the macromodel
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ST1843 PSpice macromodel is inside the folder ST1843_ORCAD_LIB: 

1) ST1843_maromodel.lib:  Cadence OrCAD PSpice encrypted macromodel circuit file for ST1843;

2) ST1843_maromodel.OLB:  Cadence OrCAD PSpice symbol library for ST1843;

In order to use this macromodel the user has to add the above .OLB library 
to the "Place Part" window and link the .lib into the simulation state.



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Simulation suggestions
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In Cadence OrCAD PSpice Simulation State Options --> Gate Level Simulation Settings --> set 
DIGINITSTATE=0 instead of “don’t care X”, to initialize all flip-flops to low state;
in Simulation State Options --> Analog Simulation --> set AUTOCONVERGE=ON also. 


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Sample Testbench Application
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The folder ST1843_ORCAD_TESTBENCH contains the OrCAD project tb.opj with sample 
testbenches applications to simulate ST1843 macromodel contained in ST1843_ORCAD_LIB.




