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31 54F191SJCQB Up/Down Binary Counter with Preset and Ripple Clock 179K NSC 2969883
32 54F191SJCX Up/Down Binary Counter with Preset and Ripple Clock 179K NSC 2727695
33 54F191SJMQB Up/Down Binary Counter with Preset and Ripple Clock 179K NSC 2969927
34 54F191SJMX Up/Down Binary Counter with Preset and Ripple Clock 179K NSC 2969913
35 54F191SMQB Up/Down Binary Counter with Preset and Ripple Clock 179K NSC 2771928
36 54F191SMX Up/Down Binary Counter with Preset and Ripple Clock 179K NSC 2727694