Subcircuit files for ICs by Yogeswaran I

[yogesh09070]

Related Issues

Integrated Circuits (ICs) are essential building blocks in electronic circuit design. Adding this subcircuit to eSim expands the available component library, enabling users to accurately simulate and analyze circuits using this IC.

Purpose

This PR adds 8 new subcircuit components to library/SubcircuitLibrary/, each in a separate commit:

IC	Description
74HCT594	8-bit serial-in, serial or parallel-out shift register
74LS112	Dual JK negative-edge-triggered flip-flop with preset and clear
74LS150	16-to-1 data selector/multiplexer
74LS298	Quad 2-input multiplexer with storage
74LS379	Quad D flip-flop with complementary outputs
74LS399	Quad 2-port register
74hc589	8-bit parallel-in/serial-out shift register
CD4095BMS	CMOS gated J-K master-slave flip-flop

Files included per component

• .cir - SPICE netlist
• .sub - Subcircuit definition
• .kicad_sch - KiCad schematic
• .cir.out - Simulation output
• _Previous_Values.xml - eSim project metadata

Approach

For each IC, the schematic was designed in eSim using KiCad. ERC was performed to check for errors. The netlist was generated and converted from KiCad to NgSpice format with the required component values assigned. The input/output waveforms were then verified against the corresponding datasheet and functional behavior to ensure correct operation.
Each component folder contains the corresponding .cir, .sub, .kicad_sch, .cir.out, and _Previous_Values.xml files.