MCP2021/2
EXAMPLE 1-3:
TYPICAL MCP2022 APPLICATION
+12
+12
(5)
RTP
WAKE-UP
(5)
Master Node Only
+12
CF
43V
CG
220 kΩ
VBB
VDD
VREG
TXD
TXD
1 kΩ
LIN Bus
RXD
I/O
RXD
LBUS
(4)
27V
CS/LWAKE
FAULT/TXE
(3)
I/O
1 kΩ
MCLR
RESET
VSS
100 nF
5V
Note 1: See Figure 2-3 for correct capacity and ESR for stable operation.
2: CF is the filter capacitor for the external voltage supply.
3: This diode is only needed if CS/LWAKE is connected to 12V supply.
4: Transient suppressor diode. Vclamp L = 43V.
5: These components are required for additional load dump protection above 43V.
FIGURE 1-3:
TYPICAL LIN NETWORK CONFIGURATION
40m
+ Return
LIN bus
1 kΩ
VBB
LIN bus
MCP202X
LIN bus
MCP202X
LIN bus
MCP202X
LIN bus
MCP202X
Slave 1
µC
Slave 2
µC
Slave n <16
µC
Master
µC
© 2009 Microchip Technology Inc.
DS22018E-page 7
MICROCHIP [ MICROCHIP ]
