2
C/SMBus Address Translators
I
The LTC4316/LTC4317/LTC4318 are I
2
C/SMBus address translators that bridge two or more segments of an I
2
C bus, reading
incoming addresses on the master side and transmitting a different 7-bit I
2
C address to the slave side to avoid address conflicts.
Only discrete resistors are needed to select the new address and no software programming is required. Up to 127 different
address translations are available.
Features
n
n
n
n
n
n
n
n
n
Allows Multiple Slaves with the Same
Address to Coexist on the Same Bus
Resistor Configurable Address
Translation
No Software Programming Required
SMBus, I
2
C and I
2
C Fast Mode
Compatible
Pass-Through Mode Allows General Call
Addressing
±4kV HBM ESD
Level Translation for 2.5V, 3.3V and 5V
Buses
Stuck Bus Timeout
Prevents SDA and SCL Corruption
During Live Board Insertion and
Removal
Part Selection
Part Number
LTC4316
LTC4317
LTC4318
Number of
Input Channels
1
1
2
Number of
Output Channels
1
2
2
Packages
3mm
×
3mm DFN-10, MSOP-10
5mm
×
3mm DFN-16
4mm
×
4mm QFN-20
Timing Diagram Example
START
BIT
a6
SCLIN
SDAIN
TRANSLATION
BYTE
SDAOUT
0
0
0
0
0
0
1
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
0
0
= 0x34
= 0x02
= 0x36
a5
a4
ADDRESS BITS
a3
a2
a1
a0
R/W
BIT
ACK
BIT
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog Devices, Inc.
All other trademarks are the property of their respective owners.
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