6

Device description

The STISO620 is a dual high-speed isolated communication channel. It integrates two channels in the same

direction and provides low levels of pulse width distortion in the full operation range.

6.1

Device operation

The device operation is described in the following table:

Table 8. Device operation table

VDD1

VDD2

Tx

Rx

Above UVLO

Above UVLO

H

H

L

L

Below UVLO

Above UVLO

X

L(1)

Above UVLO

Below UVLO

X

Tri-state

Below UVLO

Below UVLO

X

Tri-state

1. Safe state imposed by default.

When both sides of the device are powered (above UVLO threshold), the device operates as an isolated buffer

between the Tx input, and the respective Rx output (see Figure 3).

Figure 3. Timing diagram

TXinput

RXoutput

VDD

TX/ 3

VDD

RX/ 2

VDD

RX/ 2

90 %

10 %

90 %

10 %

t

DLH

t

r

t

W

t

W

1/f

IN

t

f

t

DHL

STISO620

Device description

DS14110 - Rev 2

page 9/20