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MC74AC377DT Scheda tecnica(PDF) 2 Page - ON Semiconductor |
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MC74AC377DT Scheda tecnica(HTML) 2 Page - ON Semiconductor |
2 / 12 page MC74AC377, MC74ACT377 http://onsemi.com 2 19 20 18 17 16 15 14 2 1 345 67 VCC 13 8 12 9 11 10 O7 D7 D6 O6 O5 D5 D4 O4 CP CE O0 D0 D1 O1 O2 D2 D3 O3 GND Figure 1. Pinout: 20–Lead Packages Conductors (Top View) Figure 2. LOGIC SYMBOL O0 O1 O2 O3 O4 O5 O6 O7 D0 D1 D2 D3 D4 D5 D6 D7 CP CE PIN NAMES PIN FUNCTION D0–D7 Data Inputs CE Clock Enable (Active LOW) Q0–Q7 Data Outputs CP Clock Pulse Input MODE SELECT-FUNCTION TABLE Operating Mode Inputs Outputs Operating Mode CP CE Dn Qn Load ′1′ L H H Load ′0′ L L L Hold (Do Nothing) H X No Change Hold (Do Nothing) X H X No Change H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial = LOW-to-HIGH Clock Transition Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. Figure 3. LOGIC DIAGRAM DQ CP DQ CP DQ CP DQ CP DQ CP DQ CP DQ CP DQ CP D0 D1 D2 D3 D4 D5 D6 D7 O0 O1 O2 O3 O4 O5 O6 O7 CE CP |
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