74244.tex

\documentclass[border=0.2cm]{standalone}
\usepackage{tikz}
\usepackage{circuitikz}
\usepackage{amsmath}
\usepackage{etoolbox}

\renewcommand\familydefault\sfdefault

\ctikzset{
    logic ports=ieee
}

\begin{document}

\newtoggle{left}
\newtoggle{right}

\toggletrue{left}
\toggletrue{right}

\begin{circuitikz}[straight voltages]

\iftoggle{left}{%
    \foreach \i in {1, ..., 4} {
        \node[buffer port] (1a\i) at (0,\i * 2) {};
        \draw (1a\i.up) |- ++(1.5,.75) coordinate (1a\i_join);
        \draw (1a\i.in) -- ++(-2, 0) coordinate (1a\i_label) node[left] {$ \text{1A\i} $};
        \draw (1a\i.out) -- ++(2, 0) node[right] {$ \text{1Y\i} $};
    }

    \foreach \i in {4, ..., 2} {
        \pgfmathtruncatemacro{\ii}{\i-1};
        \draw (1a\i_join) node [circ] {} -- (1a\ii_join);
    }
        

    \draw (1a4) ++ (-1, 2) node[buffer port] (1oe) {};
    \node [notcirc, left] at (1oe.bin) {};
    \draw (1oe.in) -- (1a4_label|-1oe) (1a4_label|-1oe) node[left] {$ \text{1}\overline{\text{OE}} $};
    \draw (1oe.out) -| (1a4_join);
}

\iftoggle{right}{%
    \foreach \i in {1, ..., 4} {
        \node[buffer port] (2a\i) at (8,\i * 2) {};
        \draw (2a\i.up) |- ++(1.5,.75) coordinate (2a\i_join);
        \draw (2a\i.in) -- ++(-2, 0) coordinate (2a\i_label) node[left] {$ \text{2A\i} $};
        \draw (2a\i.out) -- ++(2, 0) node[right] {$ \text{2Y\i} $};
    }

    \foreach \i in {4, ..., 2} {
        \pgfmathtruncatemacro{\ii}{\i-1};
        \draw (2a\i_join) node [circ] {} -- (2a\ii_join);
    }
        

    \draw (2a4) ++ (-1, 2) node[buffer port] (2oe) {};
    \node [notcirc, left] at (2oe.bin) {};
    \draw (2oe.in) -- (2a4_label|-2oe) (2a4_label|-2oe) node[left] {$ \text{2}\overline{\text{OE}} $};
    \draw (2oe.out) -| (2a4_join);
}
    
\end{circuitikz}

\end{document}