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SN74CB3Q3253PW Datasheet(PDF) 2 Page - Texas Instruments

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No. de pieza SN74CB3Q3253PW
Descripción Electrónicos  DUAL 1-OF-4 FET MULTIPLEXER/DEMULTIPLEXER 2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI - Texas Instruments

SN74CB3Q3253PW Datasheet(HTML) 2 Page - Texas Instruments

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DESCRIPTION/ORDERING INFORMATION (CONTINUED)
SN74CB3Q3253
DUAL 1-OF-4 FET MULTIPLEXER/DEMULTIPLEXER
2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH
SCDS145A – OCTOBER 2003 – REVISED MARCH 2005
The SN74CB3Q3253 is organized as two 1-of-4 multiplexers/demultiplexers with separate output-enable(1OE,
2OE) inputs. The select (S0, S1) inputs control the data path of each multiplexer/demultiplexer. When OE is low,
the associated multiplexer/demultiplexer is enabled, and the A port is connected to the B port, allowing
bidirectional data flow between ports. When OE is high, the associated multiplexer/demultiplexer is disabled, and
a high-impedance state exists between the A and B ports.
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry prevents damaging
current backflow through the device when it is powered down. The device has isolation during power off.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
ORDERING INFORMATION
TA
PACKAGE(1)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
QFN – RGY
Tape and reel
SN74CB3Q3253RGYR
BU253
SSOP (QSOP) – DBQ
Tape and reel
SN74CB3Q3253DBQR
BU253
–40
°C to 85°C
Tube
SN74CB3Q3253PW
TSSOP – PW
BU253
Tape and reel
SN74CB3Q3253PWR
TVSOP – DGV
Tape and reel
SN74CB3Q3253DGVR
BU253
(1)
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
FUNCTION TABLE
(EACH MULTIPLEXER/DEMULTIPLEXER)
INPUTS
INPUT/OUTPUT
FUNCTION
OE
S1
S0
A
L
L
L
B1
A port = B1 port
L
L
H
B2
A port = B2 port
L
H
L
B3
A port = B3 port
L
H
H
B4
A port = B4 port
H
X
X
Z
Disconnect
2


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