
2012 Microchip Technology Inc.
DS22298A-page 1
MCP2021A/2A
Features
The MCP2021A/2A is compliant with:
- LIN Bus Specifications Version 1.3, and 2.x.
- SAE J2602-2
Support Baud Rates up to 20 kBaud
43V Load Dump Protected
Maximum Continuous Input Voltage of 30V
Wide LIN Compliant Supply Voltage, 6.0 - 18.0V
Extended Temperature Range: -40 to +125°C
Interface to PIC EUSART and Standard USARTs
Wake-up on LIN Bus Activity or Local Wake Input
LIN Bus Pin
- Internal Pull-up Termination Resistor and
Diode for Slave Node
- Protected Against VBAT Shorts
- Protected Against Loss of Ground
- High Current Drive
TXD and LIN Bus Dominant Time-out Function
Two Low-Power Modes
- TRANSMITTER OFF Mode: 9
A (typical)
- POWER DOWN Mode: 4.5A (typical)
Output Indicating Internal RESET State (POR or
SLEEP Wake)
MCP2021A/2A On-chip Voltage Regulator
- Output Voltage of 5.0V or 3.3V 70 mA
Capability withTolerances of ±3% Over
Temperature Range
- Internal Short Circuit Current Limit
- Only External Filter and Load Capacitors
Needed
Automatic Thermal Shutdown
High Electromagnetic Immunity (EMI), Low Elec-
tromagnetic Emission (EME)
Robust ESD Performance: ±15 kV for LBUS and
VBB pin (IEC61000-4-2)
Transient Protection for LBUS and VBB Pins in
Automotive Environment (ISO7637)
Meets Stringent Automotive Design Requirements
Including “OEM Hardware Requirements for LIN,
CAN and FlexRay Interfaces in Automotive Appli-
cations”, Version 1.2, March 2011
Multiple Package Options Including Small
4x4 mm DFN
Description
The MCP2021A/2A provides a bidirectional, half-
duplex communication physical interface to meet the
LIN bus specification Revision 2.1 and SAE J2602-2.
The device incorporates a voltage regulator with 5V or
3.3V 70 mA regulated power supply output. The device
has been designed to meet the stringent quiescent
current requirements of the automotive industry and
will survive +43V load dump transients, and double
battery jumps.
Package Types (Top View)
MCP2021A
PDIP, SOIC
VREG
CS/LWAKE
TXD
1
2
3
4
8
7
6
5
RXD
FAULT/TXE
VBB
LBUS
VSS
MCP2021A
4x4 DFN
VREG
CS/LWAKE
TXD
RXD
FAULT/TXE
VBB
LBUS
VSS
1
2
3
4
8
7
6
5
EP
9
MCP2022A
PDIP, SOIC, TSSOP
VREG
CS/LWAKE
TXD
1
2
3
4
14
13
12
11
RXD
FAULT/TXE
VBB
LBUS
VSS
RESET
5
10
NC
6
9
NC
7
8
NC
* Includes Exposed Thermal Pad (EP).
LIN Transceiver with Voltage Regulator