If the ATA6628/ATA6630 is in Sleep or Silent Mode and the voltage level at the LIN-bus is in dominant state (VLIN < VBUSdom)
for a time period exceeding tmon (during a short circuit at LIN, for example), the IC switches back to Sleep Mode respectively
Silent Mode. The VS current consumption then is IVSsleep_short or IVSsilent_short (typ. 10µA more than IVSsleep respectively
IVSsilent). After a positive edge at pin LIN the IC switches directly to Fail-safe Mode (see Figure 4-7 on page 13).
Figure 4-7. Short Circuit to GND on the LIN bus During Sleep- or Silent Mode
LIN BUS
VLINL
VBUSdom
IVS
IVSsleep/silent
LIN Pre-wake
LIN dominant state
tmon
tmon
IVSfail
IVSsleep_short /
IVSsilent_short
Mode of
operation Sleep/Silent Mode
Int. Pull-up
Resistor
RLIN
Wake-up Detection Phase Sleep/Silent
Mode
off (disabled)
Fail-Safe Mode
on (enabled)
ATA6628/ATA6630 [DATASHEET]
13
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