LTC4332

1

Rev. A

For more information www.analog.com

Document Feedback

TYPICAL APPLICATION

FEATURES

DESCRIPTION

SPI Extender Over Rugged

Differential Link

The LTC®4332 is a point-to-point rugged SPI extender

designed for operation in high noise industrial environ-

ments over long distances. Using a ±60V fault protected

differential transceiver, the LTC4332 can transmit SPI data,

including an interrupt signal, up to 2MHz over two twisted

pair cables. The extended common mode range and high

common mode rejection on the differential link provides

tolerance to large ground differences between nodes.

The LTC4332 provides a control interface using a separate

slave select for configuration and fault monitoring.

Extended SPI Network Over 10m CAT5, 2MHz SCK

APPLICATIONS

n

2MHz SCK Over 10m, Operation Up to 1200m

n

Three Extended Slave Selects

n

Protected from Overvoltage Lines Fault to ±60V

n

±40kV HBM ESD on Link Pins

n

IEC ESD ±6kV and EFT ±4kV on Link Pins

n

Extended Common Mode Range: ±25V

n

Extended Interrupt

n

Separate Programmable SPI Modes

n

3V to 5.5V Supply Voltage

n

1.62V to 5.5V Logic Supply

n

4mm × 5mm 20-Lead QFN Package

n

Industrial Control and Sensors

n

Lighting and Sound System Control

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

110

LTC4332

INT

SCK

SPEED1

MISO

SPEED2

VCC

VL

REMOTE

ON

MOSI

SS1

SS2

SS3

SSC

LINK

A

B

MCU_INT

3.3V

620

10k

620

10k

3.3V

MCU_SCK

MCU_MISO

MCU_MOSI

MCU_SS1

MCU_SS2

MCU_SS3

MCU_SS4

REM_INT

3.3V

REM_SCK

REM_MISO

REM_MOSI

REM_SS1

REM_SS2

REM_SS3

10m

V GROUND LOOP

≤25V PEAK

GND1

GND2

620

620

3.3V

Y

Z

10m

110

620

620

3.3V

LTC4332

INT

SCK

SPEED1

MISO

SPEED2

4332 TA01

VCC

VL

REMOTE

ON

MOSI

SS1

SS2

SS3

LINK

Y

Z

A

B

BYPASS CAPACITORS OMITTED FOR CLARITY