MCP2003-E/MD Microchip Technology, MCP2003-E/MD Datasheet

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MCP2003-E/MD

Manufacturer Part Number
MCP2003-E/MD
Description
TXRX LIN BUS BIDIRECT 8DFN
Manufacturer
Microchip Technology
Type
Transceiverr
Datasheets

Specifications of MCP2003-E/MD

Package / Case
8-DFN
Number Of Drivers/receivers
1/1
Protocol
LIN
Voltage - Supply
6 V ~ 27 V
Mounting Type
Surface Mount
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Operating Supply Voltage
6 V to 27 V
Supply Current
90 uA
Output Voltage
400mV
Output Current
200mA
Supply Voltage Range
6V To 27V
Baud Rate
20Kbaud
Digital Ic Case Style
DFN
No. Of Pins
8
Peak Reflow Compatible (260 C)
Yes
Rohs Compliant
Yes
Leaded Process Compatible
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
INTRODUCTION
This technical brief gives a description of how to set the
MCP2003 in Power-Down mode in the case of a LIN
bus loss, which means the voltage level on LBUS falls
down to VIL. This situation could happen if the bus
Master microcontroller disconnects the termination
pull-up resistor (typically 1 kΩ) from the bus to reduce
the current consumption in the bus Power-Down state.
Additionally, this technical brief describes the wake-up
procedure when the Master puts the LIN bus back into
Operation mode.
FIGURE 1:
The MCP2003 can be put in Power-Down mode from
Operation mode or Transmitter-Off mode (T
on the falling edge on CS.
On bus activity, or when CS is set to ‘1’, the device will
immediately wake up from Power-Down mode and
enter Ready mode.
Bus activity means that L
down to V
time (tBDB).
© 2011 Microchip Technology Inc.
Author:
IL
Frank Ziegenhorn
Microchip Technology Inc.
for longer than the Bus Activity Debounce
MCP2003 Power-Down Mode and Wake-Up
Handling in the Case of LIN Bus Loss
MCP2003 Block Diagram.
BUS
voltage has dropped
OFF
Mode)
Holding the MCP2003 in power down in the case of LIN
bus loss is called “Forced Power-Down mode” in the
further description of this document.
THEORY OF OPERATION
The
communication physical interface for automotive and
industrial LIN systems to meet the LIN bus specification
Revision 2.1 and SAE J2602. The MCP2003 provides
a physical interface between a microcontroller and LIN
bus.
This could be caused by the following events:
• Loss/short to GND
• Wake-up sequence
• Sync break
This behavior is necessary to react immediately on a
LIN bus disconnection or LBUS short circuit to ground
(e.g. cable break or wrong plug-in). Additionally, the
device also wakes up on a LIN bus loss situation, which
could be an undesired behavior in certain LIN bus
systems.
MCP2003
is
TB3067
a
bidirectional,
DS93067A-page 1
half-duplex

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MCP2003-E/MD Summary of contents

Page 1

... BUS down to V for longer than the Bus Activity Debounce IL time (tBDB). © 2011 Microchip Technology Inc. Holding the MCP2003 in power down in the case of LIN bus loss is called “Forced Power-Down mode” in the further description of this document. THEORY OF OPERATION The MCP2003 ...

Page 2

... Falling Edge on LIN Note: * TXD = 0 before raising CS to ‘1’. FIGURE 2: Entering MCP2003 Power-Down Mode From Operation Mode or Transmitter-Off Mode. The Forced Power-Down mode sequence is used to enter Power-Down mode without activating the transceiver to reduce the current consumption of the transceiver. After the device is in Ready mode, this path ...

Page 3

... Microcontroller is powered TXD L BUS Power Down State Mode after Master Sleep instruction FIGURE 3: Switching Timing Diagram for the Forced Power-Down Mode Sequence. © 2011 Microchip Technology Inc x2CS >= 100ns CSactive >= 100µs TXD to 0 forced externally LIN bus disconnected Ready Transmitter OFF ...

Page 4

... TXEN = 0; #else RCSTA = 0; #endif WaitTimeTx2CS(); CSPIN = 1; WaitTimeCSactive(); CSPIN = 0; } /**********************************************************************/ /**********************************************************************/ ® FIGURE 4: PIC Microcontroller Code Example for Forced Power-Down Mode. DS93067A-page also usable refer to data sheet */ /* -> transceiver activated but refer to data sheet */ /* -> transceiver in SLEEP mode © 2011 Microchip Technology Inc ...

Page 5

... PICtail, REAL ICE, rfLAB, Select Mode, Total Endurance, TSHARC, UniWinDriver, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. ...

Page 6

... Philippines - Manila Tel: 63-2-634-9065 Fax: 63-2-634-9069 Singapore Tel: 65-6334-8870 Fax: 65-6334-8850 Taiwan - Hsin Chu Tel: 886-3-6578-300 Fax: 886-3-6578-370 Taiwan - Kaohsiung Tel: 886-7-213-7830 Fax: 886-7-330-9305 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 © 2011 Microchip Technology Inc. 08/04/10 ...

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