33661 Datasheet, PDF (17/21 Pages) Freescale Semiconductor, Inc – Local Area Network (LIN) Enhanced Physical Interface with Selectable Slew Rate

TYPICAL APPLICATIONS
TYPICAL APPLICATIONS
The 33661 can be configured in several applications.
Figures 18 and 19 show master and slave node applications.
V_PWR
An additional pullup resistor of 1.0 kΩ in series with a diode
must be added when the device is used in the master node.
33661
VSUP
> 33 kΩ
WAKE
External
Switch
I/O
MCU
V_DD
Regulator
RXD
12 V
V_DD
5.0 V
EN
V_DD
*
RXD
TXD
TXD
* Optional
INH
Control
Control
20 µA
Receiver
30 kΩ
Slope
Control
Figure 18. Master Node Typical Application
Master Node
Pullup
INH
1.0 kΩ
LIN LIN Bus
GND
V_PWR
> 33 kΩ
WAKE
External
Switch
I/O
MCU
EN
V_DD
V_DD
Regulator
RXD
12 V
V_DD
5.0 V
INH
TXD
*
RXD
TXD
* Optional
33661
VSUP
INH
Control
Control
20 µA
INH
Receiver
30 kΩ
LIN ^{LIN Bus}
Slope
Control
GND
Figure 19. Slave Node Typical Application
Analog Integrated Circuit Device Data
Freescale Semiconductor
33661
17