MCP2021-500E/SL MICROCHIP [Microchip Technology], MCP2021-500E/SL Datasheet - Page 5
MCP2021-500E/SL
Manufacturer Part Number
MCP2021-500E/SL
Description
LIN Transceiver with Voltage Regulator
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.MCP2021-500ESL.pdf
(46 pages)
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TABLE 1-1:
1.4
EXAMPLE 1-1:
© 2009 Microchip Technology Inc.
POR
READY
OPERATION
POWER DOWN
TRANSMITTER-
OFF
State
Note 1: See
Typical Applications
2: C
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..
F
OVERVIEW OF OPERATIONAL MODES
Transmitter
is the filter capacitor for the external voltage supply.
Figure 2-3
RXD
TXD
V
TYPICAL MCP2021 APPLICATION
I/O
I/O
DD
OFF
OFF
OFF
OFF
WAKE-UP
ON
220 kΩ
for correct capacity and ESR for stable operation. .
(3)
+12
Receiver
Activity
Activity
Detect
Detect
OFF
ON
ON
100nF
Regulator
Voltage
OFF
OFF
ON
ON
ON
C
G
V
V
TXD
RXD
CS/LWAKE
FAULT/TXE
SS
REG
Read CS/LWAKE, if LOW, then READY,
if HIGH, Operational mode
If CS/LWAKE high level, then Operation
mode
If CS/LWAKE low level, then Power down
If FAULT/TXE low level, then Transmitter-
Off mode
On LIN bus falling, go to READY mode.
On CS/LWAKE high level, go to
Operational mode
If CS/LWAKE low level, then Power down
If FAULT/TXE high, then Operation mode
43V
(5)
+12
V
L
BB
BUS
R
Operation
TP
C
(5)
F
Master Node Only
1 kΩ
MCP2021/2
+12
27V
(4)
DS22018E-page 5
Bus Off state
Normal
Operation
mode
Low Power
mode
Comments
LIN Bus
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