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74ACT399 Arkusz danych(PDF) 2 Page - Fairchild Semiconductor |
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74ACT399 Arkusz danych(HTML) 2 Page - Fairchild Semiconductor |
2 / 9 page www.fairchildsemi.com 2 Functional Description The AC/ACT399 is a high-speed quad 2-port register. It selects four bits of data from either of two sources (Ports) under control of a common Select input (S). The selected data is transferred to a 4-bit output register synchronous with the LOW-to-HIGH transition of the Clock input (CP). The 4-bit D-type output register is fully edge-triggered. The Data inputs (I0x, I1x) and Select input (S) must be stable only a setup time prior to and hold time after the LOW-to- HIGH transition of the Clock input for predictable operation. Function Table H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial = LOW-to-HIGH Clock Transition Logic Diagram 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 S I0 I1 CP Q Q LL X LH LH X HL HX L LH HX H HL |
Podobny numer części - 74ACT399 |
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Podobny opis - 74ACT399 |
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