LT3960

1

Rev. B

For more information www.analog.com

Document Feedback

TYPICAL APPLICATION

FEATURES

DESCRIPTION

I2C to CAN-Physical

Transceiver

The LT®3960 is a robust high speed transceiver that

extends a single-master I2C bus through harsh or noisy

environments at up to 400kbps using the CAN-physical

layer. One LT3960 sits near the I2C master, creating from

SCL and SDA equivalent differential buses (I2CAN) on

two twisted pairs. At the other end of the twisted pairs, a

second LT3960 recreates the I2C bus locally for any slave

I2C devices. A built-in 3.3V LDO powers both the I2C and

I2CAN buses from a single input supply from 4V to 60V.

Alternatively, the LT3960 can be powered directly from a

3.3V or 5V supply.

The LT3960 is available in a 10-lead MSOP package.

I2CAN Bus Link with Large Ground Loop Voltage

APPLICATIONS

n

Protected from Overvoltage Line Faults to ±40V

n

Up to 400kbps I2C Communications

n

4V to 60V Power Supply Range with Internal 3.3V

Regulator

n

3.3V or 5V Bus Voltage

n

Extended Common Mode Range (±36V)

n

Current Limited Drivers with Thermal Shutdown

n

Power-Up/Down Glitch Free Driver Outputs

n

Low Current Shutdown Mode

n

Transmit Data Dominant Timeout Function

n

E- and J-Grades Available

n

Available in a 10-Lead MSOP Package

n

AEC-Q100 Qualification in Progress

n

Industrial Networking

n

Automotive Networking

n

Remote Sensors

All registered trademarks and trademarks are the property of their respective owners.

120

2.2µF

10k

10k

120

120

120

2.2µF

10k

10k

LT3960

VIN

3960 TA01

VCC

SDA

SCL

EN/MODE

VCC

3.3V

CANSDAH

CANSDAL

CANSCLH

CANSCLL

GND

LT3960

VIN

VCC

SDA

SCL

EN/MODE

VCC

5V

VIN

4V TO 60V

CANSDAH

CANSDAL

CANSCLH

CANSCLL

GND

GND1

GND2

AC GROUND

LOOP ≤ 36V PEAK (VCC = 5V)

< 25V PEAK (VCC = 3.3V)

SDA

SCL

FLOAT = SLAVE

SDA

SCL

HIGH = MASTER

Receiving I2C Traffic Across ±25V

Common-Mode Differential

10µs/DIV

SDA(MASTER)

5V/DIV

SDA (SLAVE)

5V/DIV

GND1–GND2

20V/DIV

3960 TA01b

SLAVE-MODE LT3960

POWERED BY INTERNAL LDO (VCC = 3.3V)