PCA9306
DUAL BIDIRECTIONAL I2C BUS AND SMBus VOLTAGE-LEVEL TRANSLATOR
www.ti.com
SCPS113–OCTOBER 2004–REVISED APRIL 2005
APPLICATION INFORMATION
(1)
V
DPU
= 3.3 V
200K Ω
PCA9306
EN
(1)
8
7
V
REF1
= 1.8 V
R
PU
R
PU
2
V
V
REF1
REF2
R
PU
R
PU
V
CC
V
CC
3
4
SCL1
SDA1
SCL2
SDA2
6
5
SCL
SCL
2
SW
SW
2
I C Bus
Device
I C Bus
Master
SDA
SDA
GND
1
GND
GND
(1) The applied voltages at V
and V
should be such that V
is at least 1 V higher than V
for best translator operation.
REF1
DPU
REF2
REF1
Figure 2. Typical Application Circuit (Switch Always Enabled)
7