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SN74CBTLV3253DG4 Fiches technique(PDF) 8 Page - Texas Instruments

No de pièce SN74CBTLV3253DG4
Description  FET Multiplexer/Demultiplexer
Download  27 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

SN74CBTLV3253DG4 Fiches technique(HTML) 8 Page - Texas Instruments

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2B1
1B1
2A
1A
S0
S1
1OE
2OE
1B2
1B3
1B4
2B2
2B3
2B4
SW
SW
SW
SW
SW
SW
SW
SW
7
9
14
2
1
15
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5
4
3
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SN74CBTLV3253
SCDS039I – DECEMBER 1997 – REVISED SEPTEMBER 2015
www.ti.com
8 Detailed Description
8.1 Overview
The SN74CBTLV3253 device is a dual 1-of-4 high-speed FET multiplexer/demultiplexer. The low ON-state
resistance of the switch allows connections to be made with minimal propagation delay.
The select (S0, S1) inputs control the data flow. The FET multiplexers and demultiplexers are disabled when the
associated output-enable (OE) input is high.
The SN74CBTLV3253 device is fully specified for partial-power-down applications using Ioff. The Ioff feature
ensures that damaging current will not 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.
8.2 Functional Block Diagram
8.3 Feature Description
The SN74CBTLV3253 device is functionally equivalent to the QS3253 and has a 5-
Ω switch connection between
two ports
It also has rail-to-rail switching on data I/O ports as well as Ioff supporting partial-power-down mode operation
8.4 Device Functional Modes
Table 1 lists the functional modes of the SN74CBTLV3253.
Table 1. Function Table
(Each Multiplexer/Demultiplexer)
INPUTS
FUNCTION
OE
S1
S0
L
L
L
A port = B1 port
L
L
H
A port = B2 port
L
H
L
A port = B3 port
L
H
H
A port = B4 port
H
X
X
Disconnect
8
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Copyright © 1997–2015, Texas Instruments Incorporated
Product Folder Links: SN74CBTLV3253


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