Patent ID: 9237039
Filing Date: 2016-01-12
CPC Classification: H02H,H04B,H04L,Y10T

Claim Text:
1. A transceiver suitable for IO-Link™ devices, connectable to a cable with at least three wires, comprising: a positive supply pin connectable to a positive supply wire of the cable on which a positive supply voltage is made available; a negative supply pin connectable to a negative supply wire of the cable on which a negative supply voltage is made available; at least one input/output pin connectable to a digital data wire of the cable configured to receive/transmit data signals switching between the positive supply voltage and negative supply voltage from/to IO-Link™ devices connected to the cable; inner functional blocks; an internal positive voltage line; an internal negative voltage line; and a controlled output stage configured to connect said at least one input/output pin to said positive supply pin or to said negative supply pin, including a protection circuit for said inner functional blocks against reverse polarity due to a wrong connection of said positive and negative supply pins to respective wires of the cable; said controlled output stage comprising a driver comprising a first current path extending between a positive supply terminal and the common current terminal of the high-side leg, and a second current path extending between a negative supply terminal and common current terminal of the low-side leg, and being configured to turn on/off said two P-type and two N-type transistors to allow transmission on the digital data wire; said protection circuit comprising a voltage clamper connected between the common current terminal for said high-side leg and the common current terminal for said low-side leg, configured to enter in a conduction state in case of overvoltage on the internal negative and positive supply voltage lines.