LTC4317

1

4317fa

For more information www.linear.com/LTC4317

Typical applicaTion

FeaTures

DescripTion

Address Translator

The LTC®4317 enables the hardwired address of one or more

dress. This allows slaves with the same hardwired address to

coexist on the same bus. Only discrete resistors are needed

to select the new address and no software programming is

required.Upto127differentaddresstranslationsareavailable.

The LTC4317 incorporates a pass-through mode which dis-

ables the address translation and allows general call address-

ing by the master. The LTC4317 is designed to automatically

recover from abnormal bus conditions like bus stuck low or

premature STOP bits.

TheLTC4317hastwooutputchannelsfortwodifferentsets

of slaves. The input channels are tied together to a com-

mon set of pins to reduce the pin count and package size.

PART NUMBER

NUMBER OF INPUT

CHANNELS

NUMBER OF OUTPUT

CHANNELS

LTC4316

1

1

LTC4317

1

2

LTC4318

2

2

applicaTions

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

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

16-Lead DFN 5mm × 3mm Package

n

n

Address Translation

n

Servers

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.

4317 TA01b

TRANSLATION

BYTE

SDAOUT1

SCLIN

SDAIN

ADDRESS BITS

START

a6

a5

a4

a3

a2

a1

a0

0

1

1

0

1

0

0

= 0x34

0

0

0

0

0

1

0

= 0x02

0

0

0

0

1

1

0

1

1

0

= 0x36

R/W

BIT

ACK

BIT

SCL

SDA

4317 TA01a

3.3V

845k

61.9k

3.3V

3.3V

MASTER

SCLOUT1

SDAOUT1

READY1

SCLIN

SDAIN

ENABLE1

SENDS

ADDRESS 0x34

SCL

SDA

5V

SLAVE# 1

ADDRESS

0x36

RECEIVES

ADDRESS 0x36

TRANSLATES

BY 0x04

TRANSLATES

BY 0x02

XORL1

XORL2

LTC4317

GND

ENABLE2 READY2

93.1k

SCLOUT2

SDAOUT2

XORH2

XORH1

SCL

SDA

5V

RECEIVES

ADDRESS 0x30

SLAVE# 2

ADDRESS

0x36