Datasheet

© 2005-2012 Microchip Technology Inc. DS22018F-page 15
MCP2021/2/1P/2P
FIGURE 1-7: Typical MCP2022/MCP2022P Application.
FIGURE 1-8: Typical LIN Network Configuration.
LIN Bus
27V
(4)
VBB
LBUS
VREG
TXD
RXD
V
SS
VDD
TXD
RXD
+12
CF
CG
CS/LWAKE
I/O
FAULT/
TXE
I/O
43V
(5)
1kΩ
+12
Master Node Only
+12
220 kΩ
WAKE-UP
Note 1: See Figure 2-3 for correct capacity and ESR for stable operation.
2: C
F is the filter capacitor for the external voltage supply.
3: This diode is only needed if CS/LWAKE is connected to a 12V supply.
4: Transient suppressor diode. Vclamp L = 43V.
5: These components are required for additional load dump protection above 43V.
6: Required if CPU does not have internal pull-up.
(3)
RTP
(5)
100 pF
INT or MCLR
RESET
VDD
(6)
LIN bus
MCP202X
Master
µC
1kΩ
V
BB
Slave 1
µC
Slave 2
µC
Slave n <16
µC
40m
+ Return
LIN bus
LIN bus
MCP202X
LIN bus
MCP202X
LIN bus
MCP202X