LTC4318

1

4318fa

For more information www.linear.com/LTC4318

Typical applicaTion

FeaTures

DescripTion

Address Translator

The LTC®4318 enables the hardwired address of one or

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 LTC4318 incorporates a pass-through mode which

disables the address translations and allows general call

addressing by the master. The LTC4318 is designed to

automatically recover from abnormal bus conditions like

bus stuck low or premature STOP bits.

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

20-Lead QFN 4mm × 4mm 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.

SCL

SDA

4318 TA01a

3.3V

845k

61.9k

3.3V

3.3V

MASTER #1

SCLOUT1

SDAOUT1

READY1

SCLIN1

SDAIN1

SCLIN2

SDAIN2

ENABLE1

SENDS

ADDRESS 0x34

SCL

SDA

5V

SLAVE# 1

RECEIVES

ADDRESS 0X36

TRANSLATES

BY 0x04

TRANSLATES

BY 0x02

XORL1

XORL2

LTC4318

GND

ENABLE2 READY2

93.1k

SCL

SDA

MASTER #1

SENDS

ADDRESS 0x32

SCLOUT2

SDAOUT2

XORH2

XORH1

SCL

SDA

5V

SLAVE# 2

RECEIVES

ADDRESS 0X36

4318 TA01b

TRANSLATION

BYTE

SDAOUT1

SCLIN1

SDAIN1

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