MCP2021-330E/MF Microchip Technology, MCP2021-330E/MF Datasheet - Page 5

• Manufacturer Part Number: MCP2021-330E/MF
• Description: LIN COMPATIBLE DRIVER, 3.3V REGULATOR, -40C to +125C, 8-DFN, TUBE
• Manufacturer: Microchip Technology

TABLE 1-1:
1.4
EXAMPLE 1-1:
© 2008 Microchip Technology Inc.
POR
READY
OPERATION
POWERDOWN
TRANSMITTER-
OFF
State
Note 1: C
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 for additional load dump protection.
¬
with ESR 0.4Ω - 5Ω. .
G
F
OVERVIEW OF OPERATIONAL MODES
Transmitter
is the filter capacitor for the external voltage supply.
is the load capacitor should be ceramic or tantalum rated for extended temperatures, 1.0-22 µF
RXD
TXD
V
TYPICAL MCP2021 APPLICATION
I/O
I/O
DD
OFF
OFF
OFF
OFF
WAKE-UP
ON
220 kΩ
(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
+12
MCP202X
27V
(4)
DS22018C-page 5
Bus Off state
Normal
Operation
mode
Low Power
mode
Comments
LIN Bus