Datasheet

TLE6251-3G
Fail Safe Features
Data Sheet 21 Rev. 1.1, 2011-06-06
The under-voltage monitoring on the power supply
V
CC
and V
IO
is combined with an internal filter time. Only if the
voltage drop on each of these two power supplies is longer present as the time
t
Drop
> t
UV(VIO)
(t
Drop
> t
UV(VCC)
) the
operation mode change will be activated (see Figure 12).
Under-voltage events on the power supplies
V
CC
or V
IO
are not indicated by the NERR pin nor by the RxD pin.
Figure 12 Under-Voltage on
V
IO
or V
CC
INH
Normal Operation mode / Receive–Only mode / Stand–By mode
or Go-To Sleep command
t
t
V
CC
Sleep mode
V
CC,UV
t < t
UV(VCC)
t > t
UV(VCC)
INH
t
t
V
IO
V
IO,UV
t < t
UV(VIO)
t > t
UV(VIO)
Normal Operation mode / Receive–Only mode / Stand–By mode
or Go-To Sleep command
Sleep mode