ATA6623 ATMEL Corporation, ATA6623 Datasheet - Page 10

• Manufacturer Part Number: ATA6623
• Description: LIN Bus Transceiver with 3.3V Voltage Regulator
• Manufacturer: ATMEL Corporation

5. Fail-safe Features
10
ATA6623/ATA6625 [Preliminary]
• During a short-circuit at LIN to V
• During a short-circuit from LIN to GND the IC can be switched into Sleep or Silent mode. If
• The reverse current is very low < 15 µA at pin LIN during loss of V
• During a short circuit at VCC, the output limits the output current to I
• Pin EN provides a pull-down resistor to force the transceiver into recessive mode if EN is
• Pin RXD is set floating if V
• Pin TXD provides a pull-up resistor to force the transceiver into recessive mode if TXD is
• If TXD is short-circuited to GND, it is possible to switch to Sleep mode via ENABLE after
the power dissipation, the chip temperature exceeds T
The chip cools down and after a hysteresis of T
on high because LIN is high. During LIN overtemperature switch-off, the V
working independently.
the short-circuit disappears, the IC starts with a remote wake-up.
behavior for bus systems where some slave nodes are supplied from battery or ignition.
undervoltage, NRES switches to low and sends a reset to the microcontroller. The IC
switches into Fail-safe mode. If the chip temperature exceeds the value T
output switches off. The chip cools down and after a hysteresis of T
again. Because of Fail-safe mode, the V
switched off from the microcontroller.The microcontroller can then start with normal
operation.
disconnected.
disconnected.
tdom > 20 ms.
Batt
is disconnected.
Battery
, the output limits the output current to I
CC
voltage will switch on again although EN is
hys
, switches the output on again. RXD stays
LINoff
and the LIN output is switched off.
Batt
hys
VCCn
, switches the output on
or GND. This is optimal
. Because of
VCCoff
CC
BUS_LIM
regulator is
4957D–AUTO–07/07
, the V
. Due to
CC