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LTC4302-2 Datasheet(PDF) 16 Page - Linear Technology

Part # LTC4302-2
Description  Pin-Selectable, 2-Channel, 2-Wire Multiplexer with Bus Buffers
PDF  20 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4302-2 Datasheet(HTML) 16 Page - Linear Technology

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LTC4312
16
4312f
APPLICATIONS INFORMATION
LTC4312
GND
VCC
VCC2
4312 F10
SCLOUT1
SDAOUT1
SCLOUT2
SDAOUT2
SCLIN
SDAIN
ENABLE1
ENABLE2
ACC
DISCEN
FAULT
ENABLE1
ENABLE2
3.3V
FAULT
R3
10k
R2
10k
R1
10k
C1
0.01μF
C2
0.01μF
3.3V
3.3V
R5
10k
R4
10k
5V
R7
10k
R6
10k
I2C
DEVICE
VOL = 0.6V
I2C
DEVICE
IO CARD
CONNECTOR
I2C
DEVICE
IO CARD
CONNECTOR
Figure 10. SDA, SCL Hot Swap™ and Operation with a Non-Compliant I2C Device
Hot-Swapping
Figure 10 shows the LTC4312 in a typical hot-swapping
application where the LTC4312 is on the backplane and I/O
cards plug into the downstream channels. The outputs must
idle high and the corresponding output channel must be
disabled before an I/0 card can be plugged or unplugged
from an output channel. Figure 10 also shows the use of
a non-compliant I2C device with the LTC4312. The high
noise margin of the LTC4312 supports logic low levels up
to 0.3 • VCC, allowing devices to drive greater than 0.4V
logic low levels on the clock and data lines.



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