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MC74AC352 Arkusz danych(PDF) 2 Page - ON Semiconductor |
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MC74AC352 Arkusz danych(HTML) 2 Page - ON Semiconductor |
2 / 7 page MC74AC352, MC74ACT352 http://onsemi.com 2 FUNCTIONAL DESCRIPTION The MC74AC352/74ACT352 is a dual 4-input multiplexer. It selects two bits of data from up to four sources under the control of the common Select inputs (S0, S1). The two 4-input multiplexer circuits have individual active LOW Enables (Ea, Eb) which can be used to strobe the outputs independently. When the Enables (Ea, Eb) are HIGH, the corresponding outputs (Za, Zb) are forced HIGH. The logic equations for the outputs are shown below: Za = Ea•(I0a•S1•S0+I1a•S1•S0+ I2a•S1•S0+I3a•S1•S0) Zb = Eb•(I0b•S1•S0+I1b•S1•S0+ I2b•S1•S0+I3b•S1•S0) The MC74AC352/74ACT352 can be used to move data from a group of registers to a common output bus. The particular register from which the date came would be determined by the state of the Select inputs. A less obvious application is as a function generator. The MC74AC352/ 74ACT352 can generate two functions of three variables. This is useful for implementing highly irregular random logic. Ea I0a I3a S0 S0 I0b I1b I2b I3b Eb Za Zb 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. I1a I2a |
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