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74AC153 Datasheet(PDF) 2 Page - Hitachi Semiconductor |
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74AC153 Datasheet(HTML) 2 Page - Hitachi Semiconductor |
2 / 10 page HD74AC153 2 Logic Symbol Ea Za S0 S1 Zb I0a I1a I2a I3a I0b I1b I2b I3b Eb Pin Names I 0a to I3a Side A Data Inputs I 0b to I3b Side B Data Inputs S 0, S1 Common Select Inputs E a Side A Enable Input E b Side B Enable Input Z a Side A Output Z b Side B Output Functional Description The HD74AC153 is a dual 4-input multiplexer. It can select two bits of data from up to four sources under the control of the common Select inputs (S 0, S1). The two 4-input multiplexer circuits have individual active-Low Enables ( E a, Eb) which can be used to strobe the outputs independently. When the Enables ( Ea, E b) are High, the corresponding outputs (Za , Zb) are forced Low. The HD74AC153 is the logic implementation of a 2-pole, 4-position switch, where the position of the switch is determined by the logic levels supplied to the two Select inputs. The logic equations for the outputs are shown below. Z a = Ea•(I0a•S1•S0 + I1a•S1•S0 + I2a•S1•S0 + I3a•S1•S0) Z b = Eb•(I0b•S1•S0 + I1b•S1•S0 + I2b•S1•S0 + I3b•S1•S0) |
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