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74ACTQ153 bảng dữ liệu(PDF) 2 Page - Fairchild Semiconductor |
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74ACTQ153 bảng dữ liệu(HTML) 2 Page - Fairchild Semiconductor |
2 / 7 page www.fairchildsemi.com 2 Functional Description The ACTQ153 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 (S0, S1). The two 4-input multi- plexer 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 (Az, Zb) are forced LOW. The ACTQ153 is the logic implementation of a 2-pole, 4-position switch, where the position of the switch is determined by the logic levels sup- plied to the Select inputs. The logic equations for the out- puts 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) Truth Table H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial 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. Select Inputs Inputs (a or b) Outputs S0 S1 E I0 I1 I2 I3 Z XX H X X X X L LL LL X X X L LL L H X X X H HL L X L X X L HL L X H X X H LH L X X L X L LH L X X H X H HH L X X X L L HH L X X X H H |
Số phần tương tự - 74ACTQ153_01 |
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Mô tả tương tự - 74ACTQ153_01 |
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