TH8065KDCAA MELEXIS [Melexis Microelectronic Systems], TH8065KDCAA Datasheet - Page 17

• Manufacturer Part Number: TH8065KDCAA
• Description: Voltage Regulator with LIN Transceiver and Watchdog
• Manufacturer: MELEXIS [Melexis Microelectronic Systems]

3.6 LIN BUS Transceiver
The TH8065 has an integrated bi-directional bus interface device for data transfer between LIN bus and the
LIN protocol controller.
The transceiver consists of a driver with slew rate control, wave shaping and current limitation and a receiver
with high voltage comparator followed by a debouncing unit.
Transmit Mode
During transmission the data at the pin TxD will be transferred to the BUS driver to generate a bus signal. To
minimize the electromagnetic emission of the bus line, the BUS driver has an integrated slew rate control
and wave shaping unit.
Transmitting will be interrupted in the following cases:
The recessive BUS level is generated from the integrated 30k pull up resistor in serial with an active diode
This diode prevents the reverse current of V
(V
No additional termination resistor is necessary to use the TH8065 in LIN slave nodes. If this IC is used for
LIN master nodes it is necessary that the BUS pin is terminated via an external 1kΩ resistor in series with a
diode to VBAT.
Receive Mode
The data signals from the BUS pin will be transferred continuously to the pin RxD. Short spikes on the bus
signal are suppressed by the implemented debouncing circuit (τ = 2.8µs).
The receive threshold values V
hysteresis of 0.150*V
0.6*V
TH8065 – Datasheet
3901008065
BUS
-
-
-
>V
SUP
Sleep mode
Thermal Shutdown active
Master Reset (V
SUP
will be securely observed.
).
BUS
RxD
VSUP
60%
50%
40%
SUP
CC
. Including all tolerances the LIN specific receive threshold values of 0.4*V
< 3.15V)
V
V
thr_min
thr_max
Figure 7 - Receive mode impulse diagram
thr_max
V
thr_hys
and V
Voltage Regulator with LIN Transceiver and Watchdog
t < t
thr_min
V
thr_cnt
deb_BUS
Page 17 of 40
BUS
are symmetrical to the centre voltage of 0.5*V
during differential voltage between VSUP and BUS
t < t
deb_BUS
TH8065
SUP
May 2006
SUP
Rev 003
with a
and