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MC74AC253NMOTOROLAN/a25avaiDual 4 Input Multiplexer with 3 State Outputs
MC74ACT253NMOTON/a25avaiDual 4 Input Multiplexer with 3 State Outputs


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MC74AC253N-MC74ACT253N
DUAL 4-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS
- -The MC74AC253/74ACT253 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. Multifunctional Capability Noninverting 3-State Outputs Outputs Source/Sink 24 mA ′ACT253 Has TTL Compatible Inputs
VCC
OEb S0 I3b I2b I1b I0b Zb
OEa S1 I3a I2a I1a I0a Za GND
PIN NAMES

I0a–I3a Side A Data Inputs
I0b–I3b Side B Data Inputs
S0, S1 Common Select Inputs
OEa Side A Output Enable Input
OEb Side B Output Enable Input
Za, Zb 3-State Outputs
TRUTH TABLE

Address inputs S0 and S1 are common to both sections.
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
LOGIC SYMBOL
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