LTC4316_15 Datasheet, PDF (1/14 Pages) Linear Technology – Single I2C/SMBus Address Translator

LTC4316
Single I²C/SMBus
Address Translator
Features
n _{Allows Multiple Slaves with the Same Address to}
Coexist on the Same Bus
n _{Resistor Configurable Address Translation}
n _{No Software Programming Required}
n _{Compatible with SMBus, I}²_{C and I}²_{C Fast Mode}
n _{Pass-Through Mode Allows General Call Addressing}
n _{±4kV HBM ESD Ruggedness}
n _{Level Translation for 2.5V, 3.3V and 5V Buses}
n _{Stuck Bus Timeout}
n _{Prevents SDA and SCL Corruption During Live Board}
Insertion and Removal
n _{Support Bus Hot Swap™}
n _{10-Lead MSOP and DFN 3mm × 3mm Packages}
Applications
n _I²_{C, SMBus Address Expansion}
n _{Address Translation}
n _Servers
n _Telecom
Description
The LTC^®4316 enables the hardwired address of one or
more I²C or SMBus slave devices to be translated to a
different address. This allows slaves with the same hard-
wired address to coexist on the same bus. Only discrete
resistors are needed to select the new address and no
software programming is required. Up to 127 different
address translations are available.
The LTC4316 incorporates a pass-through mode which
disables the address translation and allows general call
addressing by the master. The LTC4316 is designed to
automatically recover from abnormal bus conditions like
bus stuck low or premature STOP bits.
PART NUMBER
LTC4316
LTC4317
LTC4318
NUMBER OF INPUT
CHANNELS
1
1
2
NUMBER OF OUTPUT
CHANNELS
1
2
2
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot
Swap is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners. Protected by U.S. Patents, including 6356140, 6650174, 7032051,
7478286. Patent pending.
Typical Application
TRANSLATES BY 0x02
3.3V
SENDS
ADDRESS 0x34
SCL
MASTER
SDA
V_CC
SCLIN SCLOUT
LTC4316
SDAIN SDAOUT
3.3V ENABLE READY
XORL XORH GND
976k 182k
3.3V
5V
RECEIVES
ADDRESS 0x36
SCL
START
BIT
ADDRESS BITS
R/W ACK
BIT BIT
a6
a5
a4
a3
a2
a1
a0
SCLIN
SLAVE
SDA
SDAIN
TRANSLATION
BYTE
0
0
1
1
0
1
0
0 = 0x34
0
0
0
0
0
0
1
0 = 0x02
SDAOUT
0
0
1
1
0
1
1
0 = 0x36
4316 TA01b
4316 TA01a
4316f
For more information www.linear.com/LTC4316
1