TH8061 Datasheet, PDF (18/36 Pages) Melexis Microelectronic Systems – Voltage Regulator with integrated LIN Transceiver

TH8061
Voltage Regulator with integrated LIN Transceiver
Input TxD
The 5V input TxD controls directly the BUS level:
TxD = low
->
TxD = high ->
BUS = low (dominant level)
BUS = high (recessive level)
The TxD pin has an internal pull up resistor connected to VCC. This guarantees that an open TxD pin
generates a recessive BUS level.
MCU
VCC
IPU_TXD
VCC
RPU_TXD
TxD
Typ.
15k
RC-Filter
(10ns)
TH8061
Figure 13 - TxD input circuitry
Output RxD
The received BUS signal will be output to the RxD pin:
BUS < V_{thr_cnt} – 0.5 * V_{thr_hys}
->
BUS > V_{thr_cnt} + 0.5 * V_{thr_hys}
->
RxD = low
RxD = high
This output is a push-pull driver between VCC and GND with an output current of 1mA.
TH8061
VCC
RxD
MCU
Figure 14 - RxD output circuitry
TH8061 – Datasheet
3901008061
Page 18 of 36
June 2004
Rev 007