MCP201-I/SN Microchip Technology, MCP201-I/SN Datasheet - Page 3

• Manufacturer Part Number: MCP201-I/SN
• Description: IC LIN TXRX ON-BOARD VREG 8SOIC
• Manufacturer: Microchip Technology
• Type: Line Transceiverr

Specifications of MCP201-I/SN

• Package / Case: 8-SOIC (3.9mm Width)
• Number Of Drivers/receivers: 1/1
• Protocol: LIN
• Voltage - Supply: 6 V ~ 18 V
• Mounting Type: Surface Mount
• Operating Supply Voltage: 18 V
• Mounting Style: SMD/SMT
• Supply Current: 1 mA
• Output Voltage: 5V
• Output Current: 50mA
• Supply Voltage Range: 6V To 18V
• Baud Rate: 20Kbaud
• Digital Ic Case Style: SOIC
• No. Of Pins: 8
• Leaded Process Compatible: Yes
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

1.0
The MCP201 provides a physical interface between a
microcontroller and a LIN half-duplex bus. It is intended
for automotive and industrial applications with serial
bus speeds up to 20 Kbaud.
The MCP201 provides a half-duplex, bidirectional
communications interface between a microcontroller
and the serial network bus. This device will translate
the CMOS/TTL logic levels to LIN level logic, and vice
versa.
The LIN specification 1.3 requires that the transceiver
of all nodes in the system be connected via the LIN pin,
referenced to ground and with a maximum external
termination resistance of 510 from LIN bus to battery
supply. The 510
Slave nodes.
The MCP201 provides a +5V 50 mA regulated power
output. The regulator uses a LDO design, is short-
circuit-protected and will turn the regulator output off if
it falls below 3.5V. The MCP201 also includes thermal
shutdown protection. The regulator has been specifi-
cally designed to operate in the automotive environ-
ment and will survive reverse battery connections,
+40V load dump transients and double-battery jumps
(see Section 1.6 “Internal Voltage Regulator”).
1.1
1.1.1
An external 27V transient suppressor (TVS) diode,
between V
with the battery supply and the V
the device from power transients (see Figure 1-2) and
ESD events. While this protection is optional, it should
be considered as good engineering practice.
TABLE 1-1:
 2004 Microchip Technology Inc.
Legend: x = Don’t care, L = Low, H = High
Note 1:
TXD
H
2:
L
DEVICE OVERVIEW
Optional External Protection
BAT
LIN transceiver overload current on the LIN pin is 200 mA.
Voltage regulator overload current on voltage regulator greater than 50 mA.
TRANSIENT VOLTAGE
PROTECTION (LOAD DUMP)
and ground, with a 50 resistor in series
SOURCES OF THERMAL OVERLOAD
corresponds to 1 Master and 16
RXD
H
L
BAT
LIN transmitter shutdown, receiver and voltage regulator active, thermal overload
condition.
Regulator shutdown, receiver active, bus contention.
pin serve to protect
1.1.2
An external reverse-battery-blocking diode can be
used to provide polarity protection (see Figure 1-2).
This protection is optional, but should be considered as
good engineering practice.
1.2
1.2.1
For component-level ESD ratings, please refer to the
maximum operation specifications.
1.2.2
The LIN Bus specification states that the LIN pin must
transition to the recessive state when ground is
disconnected. Therefore, a loss of ground effectively
forces the LIN line to a hi-impedance level.
1.2.3
The thermal protection circuit monitors the die
temperature and is able to shut down the LIN
transmitter and voltage regulator. Refer to Table 1-1 for
details.
There are three causes for a thermal overload. A
thermal shut down can be triggered by any one, or a
combination of, the following thermal overload
conditions.
• Voltage regulator overload
• LIN bus output overload
• Increase in die temperature due to increase in
Driving the TXD and checking the RXD pin makes it
possible to determine whether there is a bus contention
(Rx = low, Tx = high) or a thermal overload condition
(Rx = high, Tx = low).
environment temperature
Note:
Comments
Internal Protection
REVERSE BATTERY PROTECTION
ESD PROTECTION
GROUND LOSS PROTECTION
THERMAL PROTECTION
After recovering from a thermal, bus or
voltage regulator overload condition, the
device will be in the Ready1 mode. In order
to go into Operational mode, CS/WAKE pin
has to be toggled.
MCP201
DS21730D-page 3