Datasheet

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APPLICATION INFORMATION
V
CC1
V
CC1
V
CC2
SYSTEM-1 SYSTEM-2
V
CC1
1
2
3
4
8
7
6
5
V
CC2
V
CC2
SN74LVC2T45
DUAL-BIT DUAL-SUPPLY BUS TRANSCEIVER
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS
SCES516I – DECEMBER 2003 – REVISED MARCH 2007
The following shows an example of the SN74LVC2T45 being used in a unidirectional logic level-shifting
application.
PIN NAME FUNCTION DESCRIPTION
1 V
CCA
V
CC1
SYSTEM-1 supply voltage (1.65 V to 5.5 V)
2 A1 OUT1 Output level depends on V
CC1
voltage.
3 A2 OUT2 Output level depends on V
CC1
voltage.
4 GND GND Device GND
5 DIR DIR GND (low level) determines B-port to A-port direction.
6 B2 IN2 Input threshold value depends on V
CC2
voltage.
7 B1 IN1 Input threshold value depends on V
CC2
voltage.
8 V
CCB
V
CC2
SYSTEM-2 supply voltage (1.65 V to 5.5 V)
Figure 2. Unidirectional Logic Level-Shifting Application
15
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