Datasheet

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DESCRIPTION/ORDERING INFORMATION (CONTINUED)
SN74CBT3253C
DUAL 1-OF-4 FET MULTIPLEXER/DEMULTIPLEXER
5-V BUS SWITCH WITH –2-V UNDERSHOOT PROTECTION
SCDS123B – JULY 2003 – REVISED JANUARY 2007
This device is fully specified for partial-power-down applications using I
off
. The I
off
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 V
CC
through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
ORDERING INFORMATION
T
A
PACKAGE
(1)
ORDERABLE PART NUMBER TOP-SIDE MARKING
QFN – RGY Reel of 1000 SN74CBT3253CRGYR CU253C
Tube of 40 SN74CBT3253CD
SOIC – D CBT3253C
Reel of 2500 SN74CBT3253CDR
Tube of 80 SN74CBT3253CDB
–40 ° C to 85 ° C SSOP – DB CU253C
Reel of 2000 SN74CBT3253CDBR
SSOP (QSOP) – DBQ Reel of 2500 SN74CBT3253CDBQR CU253C
Tube of 90 SN74CBT3253CPW
TSSOP – PW CU253C
Reel of 2000 SN74CBT3253CPWR
(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
A
OE S1 S0
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 X Disconnect
2
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