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MCP2021A Datasheet(PDF) 13 Page - Microchip Technology

Part # MCP2021A
Description  LIN Transceiver with Voltage Regulator
PDF  46 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP2021A Datasheet(HTML) 13 Page - Microchip Technology

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 2012-2014 Microchip Technology Inc.
DS20002298C-page 13
MCP2021A/2A
1.6
Typical Applications
FIGURE 1-7:
TYPICAL APPLICATION CIRCUIT
FIGURE 1-8:
TYPICAL LIN NETWORK CONFIGURATION
LIN Bus
VBB
LBUS
VREG
TXD
RXD
VSS
VDD
TXD
RXD
Microcontroller
VBAT
CBAT
CREG
CS/LWAKE
I/O
FAULT/TXE
I/O
43V (5)
1k
VBB
Master Node Only
VBAT
220 k
Wake-Up
Note 1:
CREG, the load capacitor, should be ceramic or tantalum rated for extended temperatures, 1.0 – 22 µF.
See Figure 2-1 to select the correct ESR.
2:
CBAT is the filter capacitor for the external voltage supply. Typically 10 x CREG, with no ESR restriction.
See Figure 1-6 to select the minimum recommended value for CBAT. The RTP value is added to the line
resistance.
3:
This diode is only needed if CS/LWAKE is connected to the VBAT supply.
4:
ESD protection diode.
5:
This component is for additional load dump protection.
6:
An external 10 kΩ resistor is recommended for some applications.
(3)
RTP
RESET
RESET
VSS
I/O
(6)
100 nF
MMBZ27V (4)
220 pF
LIN bus
MCP202XA
1k
VBB
40m
+ Return
LIN bus
LIN bus
MCP205X
LIN bus
MCP202XA
LIN bus
MCP2003
Slave 1
(MCU)
Slave 2
(MCU)
Slave n <16
(MCU)
Master
(MCU)



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