MC74F353

DUAL 4-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS The MC54/74F353 is a dual 4-input multiplexer with 3-state outputs. It can select two bits of data from four sources using common Select inputs. The outputs may be individually switched to a high impedance state with a HIGH on the respective Output Enable (OE) inputs, allowing the outputs to interface directly with bus-oriented systems. MC54/74F353 DUAL 4-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS Inverted Version of F253 Multifunction Capability Separate Enables for Each Multiplexer J SUFFIX CERAMIC CASE 620-09 16 1 FUNCTIONAL DESCRIPTION The MC54/74F353 contains two identical 4-input multiplexers with 3-state outputs. They select two bits from four sources selected by common Select inputs (S0, S1).The 4-input multiplexers have individual Output enable (OEa, OEb) inputs which, when HIGH, force the outputs to a high impedance (high Z) state. The logic equations for the outputs are shown below: Za=OEa (I0a S1 S0 +I1a S1 S0 + I2a S1 S0 + I3a S1 S0) Zb=OEb (I0b S1 S0 + I1b S1 S0 + I2bS1S0+I3bS1S0) If the outputs of 3-state devices are tied together, all but one device must be in the high impedance state to avoid high currents that would exceed the maximum ratings. Designers should ensure that Output Enable signals to 3-state devices whose outputs are tied together are designed so that there is no overlap. 16 1 N SUFFIX PLASTIC CASE 648-08 16 1 D SUFFIX SOIC CASE 751B-03 ORDERING INFORMATION C...