Datasheet

TLE6251-3G
Operation Modes
Data Sheet 13 Rev. 1.1, 2011-06-06
In order to enter the Stand-By mode or the Sleep mode, the EN signal needs to be set to logical “Low” a defined
time after the NSTB pin was set to logical “Low”. Important for the mode selection is the timing between the falling
edge of the NSTB signal and the EN signal. If the logical signal on the EN pin goes low before the transition time
t <
t
hSLP
has been reached, the TLE6251-3G enters into Stand-By mode and the INH pin remains connected to the
V
S
supply. In the case the logical signal on the EN pin goes low after the transition time t > t
hSLP
, the TLE6251-3G
enters into Sleep mode simultaneous with the expiration of the time window
t
hSLP
and the INH becomes
disconnected from the
V
S
supply and is floating. (see Figure 5).
Figure 5 Entering Sleep Mode or Stand-By Mode
The signal on the CAN bus has no impact to mode changes. The operation mode can be changed regardless if
the CAN bus is “Dominant” or “Recessive”.
EN
NSTB
INH
t < t
hSLP
Go-To Sleep
command
Stand-By mode
Normal Operation
mode
t
hSLP
EN
NSTB
INH
t > t
hSLP
Go-To Sleep
command
Sleep mode
Normal Operation
mode
t
hSLP
t
t
t
t
t
t