AND-OR-invert

The 2-1 AOI gate can be represented by the following boolean equation and truth table: Real world examples of an 2-2 AOI gate are found in the CD4085B, SN74LS51, SN5450 logic ICs (see further below).

[4][5][6] The 2-2 AOI gate can be represented by the following boolean equation and truth table: Real world examples of an 3-3 AOI gate is found in the SN74LS51 logic IC (see further below).

Real world examples of an 4-4 AOI gate is found in the CD4048B logic IC (see further below).

AND-OR-invert (AOI) and OAI gates can be readily implemented in CMOS circuitry.

This results in increased speed, reduced power, smaller area, and potentially lower fabrication cost.

Symbol for 2-1 AOI gate. The AND gate has inputs A and B (per table).
Symbol for 2-2 AOI gate
Symbol for 4-4 AOI gate
compound logic gate for (CD + B) A , plus CMOS version.
An AOI21 logic gate in CMOS using a complex gate (left) and standard gates (right)