LTC4317
2
Dual I C/SMBus
Address Translator
Fea T Descrip T
n
Allows Multiple Slaves with the Same Address to The LTC 4317 enables the hardwired address of one or more
2
Coexist on the Same Bus I C or SMBus slave device to be translated to a different ad-
n
Resistor Configurable Address Translation dress. This allows slaves with the same hardwired address to
n
No Software Programming Required coexist on the same bus. Only discrete resistors are needed
2 2
n
Compatible with SMBus, I C and I C Fast Mode to select the new address and no software programming is
n
Pass-Through Mode Allows General Call Addressing required. Up to 127 different address translations are available.
n
4kV HBM ESD Ruggedness
The LTC4317 incorporates a pass-through mode which dis-
n
Level Translation for 2.5V, 3.3V and 5V Buses
ables the address translation and allows general call address-
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Stuck Bus Timeout
ing by the master. The LTC4317 is designed to automatically
n
Prevents SDA and SCL Corruption During Live Board
recover from abnormal bus conditions like bus stuck low or
Insertion and Removal
premature STOP bits.
n
Support Bus Hot Swap
n The LTC4317 has two output channels for two different sets
16-Lead DFN 5mm 3mm Package
of slaves. The input channels are tied together to a com-
mon set of pins to reduce the pin count and package size.
a T
NUMBER OF INPUT NUMBER OF OUTPUT
PART NUMBER CHANNELS CHANNELS
2
n
I C, SMBus Address Expansion
LTC4316 1 1
n
Address Translation
LTC4317 1 2
n
Servers
LTC4318 2 2
n
Telecom
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks 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 a T
3.3V 5V
TRANSLATES
V
CC
BY 0x02
SCL SCL
SCLIN SCLOUT1
SLAVE# 1
ADDRESS
MASTER R/W ACK
LTC4317
0x36
START ADDRESS BITS BIT BIT
SDA SDAIN SDAOUT1 SDA
a6 a5 a4 a3 a2 a1 a0
SENDS RECEIVES
SCLIN
ADDRESS 0x34 ADDRESS 0x36
3.3V ENABLE1 READY1
SDAIN 0 0 1 1 0 1 0 0 = 0x34
5V
ENABLE2 READY2
TRANSLATES TRANSLATION
0 0 0 0 0 0 1 0 = 0x02
SCL BYTE
BY 0x04
SCLOUT2
SLAVE# 2
ADDRESS
SDAOUT1 0 0 1 1 0 1 1 0 = 0x36
0x36
4317 TA01b
SDAOUT2
SDA
XORH2
RECEIVES
GND
XORH1 ADDRESS 0x30
XORL2 XORL1
3.3V
845k 61.9k 93.1k
4317 TA01a
4317fa
1
For more information www.linear.com/LTC4317
ion pplica
ions pplica
ion uresLTC4317
a Te Maxi Mu M r a T p in c F T
(Notes 1, 2)
TOP VIEW
Input Supply Voltage V ............................. 0.3V to 6V
CC
GND 1 16 SCLOUT2
Input Voltages
ENABLE2 2 15 SCLIN
ENABLEn ...................................................... 0.3V to 6V
XORH2 3 14 SCLOUT1
XORLn, XORHn ................................0.3V to V + 0.3V
CC
XORL2 4 13 SDAOUT1
17
Output Voltages
GND
XORH1 5 12 SDAIN
READYn ....................................................... 0.3V to 6V
XORL1 6 11 SDAOUT2
Output Currents
V 7 10 READY1
CC
READYn, SDAOUTn ................................................50mA
ENABLE1 8 9 READY2
Input/Output Voltages
DHC PACKAGE
SCLIN, SCLOUTn, SDAIN, SDAOUTn ............ 0.3V to 6V
16-LEAD (5mm 3mm) PLASTIC DFN
T = 150C, = 42C/W
JMAX JA
Operating Temperature Range
EXPOSED PAD (PIN 17) IS GND, PCB CONNECTION OPTIONAL
LTC4317C ................................................ 0C to 70C
LTC4317I .............................................40C to 85C
Storage Temperature Range .................. 65C to 150C
o r Der i n F Ma T
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4317CDHC#PBF LTC4317CDHC#TRPBF 4317 16-Lead (5mm 3mm) Plastic DFN 0C to 70C
LTC4317IDHC#PBF LTC4317IDHC#TRPBF 4317 16-Lead (5mm 3mm) Plastic DFN 40C to 85C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: