ZIOL2201 datasheet(60/92 Pages) RENESAS

60 / 92 page

IO-Link Compliant HV Line

Driver IC Family

ZIOL2xxx

Datasheet

April 26, 2016

Application Information

ZIOL2xxx application circuits contain usually external components, which are required for overvoltage and reverse

polarity protection. Table 4.1 provides a summary about requires components. The in the following figures used

external components, in particular the special component type and it parameters are mentioned in this table.. The

following schematics show standard application circuits in principle with the focus to the interface part of the

physical level transceiver performed by the ZIOL2xxx Ics..

Figure 4.1

Simplified Application Circuit with the ZIOL2xxx in Device Mode

µC

GND

Vcc

ZIOL2401

AUX_EN

AUX_TX

WURQ

TX_EN

INT_L

RST_L

PFD

VDD

COM_O

VSS

LR_IN

LR_OUT

COM_I

Application

specific

analog

part

AUX_O

Standard

Cable

Device (Sensor)

Vout

DC_RDY

L+

L-

C/Q

AUX_I

AUX_RX

In principle an IO-Link device cable interface (or the interface for a standard sensor/actuator) requires four (one

channel) or six (Two channels) protection diodes. The diodes D4 … D7 are fast clipping schottky diodes. Those

highly recommended diodes damp signal overshoots and make sure that in IO-Link device applications the device

can detect supply power failures as illustrated in Figure 4.3. D2 and D3 provide the reverse polarity protection for

the device unit as shown in Figure 4.1.

Since there is normally no chance in IO-Link master applications to apply the supply voltage in reverse manner,

the reverse polarity protection diodes D2 and D3 can be omitted in master applications (Figure 4.2). With respect

to Figure 4.1 and Figure 4.2 the PFD pin (prior IC Rev B called M_EN pin) is connected to power or ground as it

was required in using Rev A. Using this way of interconnections of the PFD pin requires disabling of the line-fail

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