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74F539PC Datasheet(PDF) 2 Page - Fairchild Semiconductor |
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74F539PC Datasheet(HTML) 2 Page - Fairchild Semiconductor |
2 / 6 page www.fairchildsemi.com 2 Unit Loading/Fan Out Truth Table (each half) H = HIGH Voltage Level X = Immaterial L = LOW Voltage Level Z = High Impedance Logic Diagram (one half shown) Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. Pin Names Description U.L. Input IIH/IIL HIGH/LOW Output IOH/IOL A0a–A1a Side A Address Inputs 1.0/1.0 20 µA/−0.6 mA A0b–A1b Side B Address Inputs 1.0/1.0 20 µA/−0.6 mA Ea, Eb Enable Inputs (Active LOW) 1.0/1.0 20 µA/−0.6 mA OEa, OEb Output Enable Inputs (Active LOW) 1.0/1.0 20 µA/−0.6 mA Pa, Pb Polarity Control Inputs 1.0/1.0 20 µA/−0.6 mA O0a–O3a Side A 3-STATE Outputs 150/40 (33.3) −3 mA/24 mA (20 mA) O0b–O3b Side B 3-STATE Outputs 150/40 (33.3) −3 mA/24 mA (20 mA) Function Inputs Outputs OE E A1 A0 O0 O1 O2 O3 High Impedance H X X X Z Z Z Z Disable L H X X On = P Active HIGH L L L L H L L L Output L L L H L H L L (P = L) L L H LLL H L LL H H L L L H Active LOW L L L L L H H H Output L L L H H L H H (P = H) L L H L H H L H L L H HHH H L |
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