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STE12PS Datasheet(PDF) 26 Page - STMicroelectronics

Part # STE12PS
Description  12 channel integrated PSE line manager
PDF  44 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STE12PS Datasheet(HTML) 26 Page - STMicroelectronics

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I2C interface
STE12PS
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4
I2C interface
The STE12PS has an I2C interface to allow the access to the internal device registers. The
external controller can be fully isolated from the Ethernet port thanks to an integrated 3.3V
SMPS power source and using optocouplers on I2C bus.(
Figure 13).
Figure 13.
Isolated ethernet power system using optocouplers for I2C interface
SDAIN
SDAOUT
SCLIN
DGND
OPC 1
OPC 3
3.3V
Digitalground
SCL bus
SDA bus
Controller GND
Controller VDD
INTn
INT bus
OPC 2
OPC 4
SDAIN
SDAOUT
SCLIN
DGND
OPC 1
OPC 3
3.3V
Digitalground
STE12PS
SCL bus
SDA bus
Controller GND
Controller VDD
INTn
INT bus
OPC 2



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