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74ALVC16821 датащи(PDF) 2 Page - Fairchild Semiconductor |
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74ALVC16821 датащи(HTML) 2 Page - Fairchild Semiconductor |
2 / 6 page www.fairchildsemi.com 2 Connection Diagram Truth Tables H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial (HIGH or LOW, inputs may not float) Z = High Impedance O0 = Previous O0 before LOW-to-HIGH transition of Clock = LOW-to-HIGH transition Functional Description The 74ALVC16821 contains twenty D-type flip-flops with 3-STATE standard outputs. The device is byte controlled with each byte functioning identically, but independent of each other. Control pins can be shorted together to obtain full 20-bit operation. The following description applies to each byte. The twenty flip-flops will store the state of their individual D-type inputs that meet the setup and hold time requirements on the LOW-to-HIGH Clock (CLK) transition. The 3-STATE standard outputs are controlled by the Out- put Enable (OEn) input. When OEn is HIGH, the standard outputs are in the high impedance mode but this does not interfere with entering new data into the flip-flops. Logic Diagrams Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. Inputs Outputs CLK1 OE1 D0–D9 O0–O9 XH X Z LL L LH H L or H L X O0 Inputs Outputs CLK2 OE2 D10–D19 O10–O19 XH X Z LL L LH H L or H L X O0 |
Аналогичный номер детали - 74ALVC16821 |
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Аналогичное описание - 74ALVC16821 |
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