LTC4310-1/LTC4310-2



431012f

Typical applicaTion

DescripTion

Hot-Swappable

into signals that are transmitted across an isolation barrier

to another LTC4310. The receiving LTC4310 decodes the

state.Theisolationbarriercanbebridgedbyaninexpensive

Ethernet,orothertransformer,toachievecommunications

across voltage differences reaching thousands of volts, or

it can be bridged by capacitors for lower voltage isolation.

Rise time accelerators provide strong pull-up currents on

SCL and SDA rising edges to meet rise time specifications

for heavily loaded systems. Data and clock Hot Swap™

circuitry prevent data corruption when a card is inserted

into or removed from a live bus. When a bus is stuck low

for 37ms, the LTC4310 turns off its pull-down devices and

generates up to sixteen clocks and a STOP bit in an attempt

to free the bus. Driving EN low sets the LTC4310 in a very

low current shutdown mode to conserve power.

FeaTures

applicaTions

n

Isolated Buses

n

Full Isolation with Inexpensive Ethernet

Transformers or Capacitors

n

Low Voltage Level Shifting

n

100kHz for LTC4310-1

400kHz for LTC4310-2

n

n

±5kV Human Body Model ESD Protection

n

Rise Time Accelerators

n

SDA, SCL Hot-Swapping

n

Very Low Shutdown Current

n

Stuck Bus Disconnect and Recovery

n

Thermal Shutdown

n

10-Lead MSOP and 3mm

× 3mm DFN Packages

n

n

Isolated Power Supplies

n

Positive-to-Negative Rail Communications

n

Power-over-Ethernet

RXP

10/100Base-TX

ETHERNET TRANSFORMER

EPF8119S

RXN

TXP

SDA

SCL

EN

TXN GND

READY

0.01µF

0.01µF

ISOLATED

5V

3.3V

3.3k

3.3k

3.3k

3.3k

LTC4310-1

VCC

SDA2

SCL2

SDA1

SCL1

0.01µF

0.01µF

431012 TA01a

TXP

TXN

RXP

RXN

SDA

SCL

EN

READY

GND

LTC4310-1

VCC

LTC4310 Operating Through

20kV/µs Common Mode Transient

L

, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. Hot Swap is a trademark of Linear Technology Corporation. All other

trademarks are the property of their respective owners.

2µs/DIV

20kV/µs

0V

0V

500V/

DIV

2V/DIV

431012 TA01b

SDA

SCL