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SN74LVC1T45
www.ti.com SCES515K –DECEMBER 2003–REVISED DECEMBER 2014
5 Description (Continued)
The SN74LVC1T45 is designed so that the DIR input is powered by V
CCA
.
This device is fully specified for partial-power-down applications using I
off
. The I
off
circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
The V
CC
isolation feature ensures that if either V
CC
input is at GND, then both ports are in the high-impedance
state.
NanoFree package technology is a major breakthrough in IC packaging concepts, using the die as the package.
6 Pin Configuration and Functions
Pin Functions
PIN
I/O DESCRIPTION
NAME NO.
V
CCA
1 p SYSTEM-1 supply voltage (1.65 V to 5.5 V)
GND 2 G Device GND
A 3 I/O Output level depends on V
CC1
voltage.
B 4 I/O Input threshold value depends on V
CC2
voltage.
DIR 5 I GND (low level) determines B-port to A-port direction.
V
CCB
6 P SYSTEM-2 supply voltage (1.65 V to 5.5 V)
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