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MC74LCX74DTG Datasheet(PDF) 2 Page - ON Semiconductor |
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MC74LCX74DTG Datasheet(HTML) 2 Page - ON Semiconductor |
2 / 8 page MC74LCX74 http://onsemi.com 2 Figure 1. Pinout: 14−Lead (Top View) 13 14 12 11 10 9 8 2 1 34567 VCC CD2 D2 CP2 SD2O2 O2 CD1 D1 CP1 SD1O1 O1 GND Figure 2. Logic Diagram O1 SD1 Q 4 5 D1 D 2 CP1 CP 3 CD1 1 O1 Q 6 SD CD O2 SD2 Q 10 9 D2 D 12 CP2 CP 11 CD2 13 O2 Q 8 SD CD PIN NAMES Pins Function CP1, CP2 Clock Pulse Inputs D1−D2 Data Inputs CD1, CD2 Direct Clear Inputs SD1, SD2 Direct Set Inputs On−On Outputs TRUTH TABLE Inputs Outputs SDn CDn CPn Dn On On Operating Mode L H X X H L Asynchronous Set H L X X L H Asynchronous Clear L L X X H H Undetermined H H ↑ h H L L d dR dR i t H H ↑ l L H Load and Read Register H H ↑ X NC NC Hold H = High Voltage Level h = High Voltage Level One Setup Time Prior to the Low−to−High Clock Transition L = Low Voltage Level l = Low Voltage Level One Setup Time Prior to the Low−to−High Clock Transition NC = No Change X = High or Low Voltage Level and Transitions are Acceptable ↑ = Low−to−High Transition ↑ = Not a Low−to−High Transition For ICC reasons, DO NOT FLOAT Inputs |
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