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  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP2025 Datasheet

LIN Transceiver

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MCP2025 pdf
MCP2025
LIN Transceiver with Voltage Regulator
Features:
• Compliant with LIN Bus Specifications Version
1.3, 2.1 and with SAE J2602-2
• Supports Baud Rates up to 20 kBaud
• 43V Load Dump Protected
• Maximum Continuous Input Voltage: 30V
• Wide LIN-Compliant Supply Voltage: 6.0-18.0V
• Extended Temperature Range: -40°C to +125°C
• Interface to PIC® EUSART and Standard USARTs
• Wake-Up on LIN Bus Activity or Local Wake Input
• Local Interconnect Network (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: 90 µA (typical)
- Power Down: 4.5 µA (typical)
• MCP2025 On-Chip Voltage Regulator:
- Output Voltage of 5.0V or 3.3V
at 70 mA Capability with Tolerances of ±3%
Over the Temperature Range
- Internal Short-Circuit Current Limit
- External Components Limited to Filter
Capacitor and Load Capacitor
• Automatic Thermal Shutdown
• High Electromagnetic Immunity (EMI), Low
Electromagnetic 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
Applications”, Version 1.3, May 2012
• Multiple Package Options, Including Small
4x4 mm DFN Package
Description:
The MCP2025 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
at 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.
The MCP2025 family members include:
- MCP2025-500, 8-pin, LIN driver with 5.0V
regulator
- MCP2025-330, 8-pin, LIN driver with 3.3V
regulator
Package Types
VBB
CS/LWAKE
VSS
LBUS
MCP2025
PDIP, SOIC
18
27
36
45
VREG
RESET
TXD
RXD
MCP2025
4x4 DFN
VBB 1
CS/LWAKE 2
VSS 3
LBUS 4
8 VREG
EP 7 RESET
9 6 TXD
5 RXD
2012-2014 Microchip Technology Inc.
DS20002306B-page 1



  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP2025 Datasheet

LIN Transceiver

No Preview Available !

MCP2025 pdf
MCP2025
MCP2025 Block Diagram
Short-Circuit
Protection
VREG
Internal Circuits
VREG
RXD
4.2V
CS/LWAKE
TXD
Thermal
Protection
Voltage
Regulator
Wake-Up Logic
and
Power Control
Ratiometric
Reference
Bus Wake-Up
RESET
VBB
Slope Control
Thermal and
Short-Circuit
Protection
Bus
Dominant
Timer
~ 30 k
LBUS
VSS
DS20002306B-page 2
2012-2014 Microchip Technology Inc.



  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP2025 Datasheet

LIN Transceiver

No Preview Available !

MCP2025 pdf
MCP2025
1.0 DEVICE OVERVIEW
The MCP2025 provides a physical interface between a
microcontroller and a LIN half-duplex bus. It is intended
for automotive and industrial applications with serial
bus baud rates up to 20 kBaud. This device will
translate the CMOS/TTL logic levels to LIN logic levels,
and vice versa.
The device offers optimum EMI and ESD performance
and it can withstand high voltage on the LIN bus. The
device supports two low-power modes to meet
automotive industry power consumption requirements.
The MCP2025 also provides a +5V or 3.3V regulated
power output at 70 mA.
1.1 Modes of Operation
The MCP2025 works in five modes: Power-On Reset,
Power-Down, Ready, Operation and Transmitter Off.
For an overview of all operational modes, please refer
to Table 1-1. For the operational mode transition,
please refer to Figure 1-1.
FIGURE 1-1:
STATE DIAGRAM
POR(2)
VREG OFF
RX OFF
TX OFF
VBB > VON
CS/LWAKE = 0
READY
VREG ON
RX ON
TX OFF
CS/LWAKE = 1 &TXD = 1
VREG_OK = 1(1)
CS/LWAKE = 1 OR
Voltage Rising Edge on LBUS
CS = 1 &TXD = 0&
TX OFF
VREG ON
RX ON
TX OFF
CS/LWAKE = 0
&TXD = 0
POWER-DOWN
VREG OFF
RX OFF
TX OFF
CS/LWAKE = 1&
TXD = 1&
No Fault(3)
CS/LWAKE = 0 or
Fault detected(3)
OPERATION
VREG ON
RX ON
TX ON
Note 1: VREG_OK: Regulator Output Voltage > 0.8VREG_NOM.
2: If the voltage on pin VBB falls below VOFF, the device will enter Power-On Reset mode from all other
modes, which is not shown in the figure.
3: Faults include TXD/LBUS permanent dominant, LBUS short to VBB, thermal protection and VREG_OK is
false.
2012-2014 Microchip Technology Inc.
DS20002306B-page 3




Part Number MCP2025
Description LIN Transceiver
Maker Microchip Technology
Total Page 30 Pages
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