MC14507CP - Quad 2-Input XOR Gate PIN:s ===== 1 - Input A Gate 1 PDIP14 2 - Input B Gate 1 -------- 3 - Output Gate 1 ____ 4 - Output Gate 2 1a-|o |-Vdd 5 - Input B Gate 2 1b-| |-4a 6 - Input A Gate 2 1X-| |-4b 7 - Vss 2X-| |-4X 8 - Input A Gate 3 2b-| |-3X 9 - Input B Gate 3 2a-| |-3b 10 - Output Gate 3 Vss-|____|-3a 11 - Output Gate 4 12 - Input B Gate 4 13 - Input A Gate 4 14 - Vdd Truth table =========== a b | X ----+--- 0 0 | 0 0 1 | 1 1 0 | 1 1 1 | 0