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參數(shù)資料
| 型號： | MCP201 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | LIN Transceiver with Voltage Regulator(帶有集成Vreg的線收發(fā)器) |
| 中文描述： | LIN收發(fā)器和穩(wěn)壓器（帶有集成Vreg的線收發(fā)器） |
| 文件頁數(shù)： | 3/27頁 |
| 文件大?。?/td> | 417K |
| 代理商： | MCP201 |
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2003 Microchip Technology Inc.
Preliminary
DS21730C-page 3
1.0
DEVICE OVERVIEW
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 com-
munications interface between a microcontroller and
the serial network bus. This device will translate the
CMOS/TTL logics 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 ter-
mination resistance of 510
from LIN bus to battery
(510
is the maximum load of the LIN bus, which
corresponds to one Master and 16 Slave nodes).
The MCP201 provides a +5V 50 mA regulated power
supply. This function is short-circuit-protected and it
can generate a thermal shutdown. The regulator has
been specifically designed to operate in the automotive
environment and will survive reverse battery connec-
tions, +40V load dump transients, and double-battery
jumps (see Section 1.6, “Internal Voltage Regulator”).
1.1
Optional External Protection
1.1.1
TRANSIENT VOLTAGE
PROTECTION (LOAD DUMP)
An external 30V zener diode, between V
BAT
and
ground, with a 50
resistor in series with the battery
supply and the V
BAT
pin serve to protect the device from
power transients (see Figure 1-2).This protection is
optional, but should be considered as good engineering
practice.
1.1.2
REVERSE BATTERY PROTECTION
An external reverse battery blocking diode can be used
to provide polarity protection (see Figure 1-2). This pro-
tection is optional, but should be considered as good
engineering practice.
1.2
Internal Protection
1.2.1
ESD PROTECTION
This device meets IEC 1000-4-2:1995 specifications.
1.2.2
GROUND LOSS PROTECTION
The LIN bus specification states that an inactive node
must assume the recessive state. Therefore, loss of
ground effectively forces the LIN line to a hi-impedance
level.
1.2.3
THERMAL PROTECTION
The thermal protection circuit monitors the die temper-
ature and is able to shut down the
LIN transmitter and
voltage regulator. Refer to Table 1-1 for details.
There are two sources for a thermal overload. One is
the voltage regulator, which can have an output over-
load. The other is the LIN transmitter with a short-circuit
to V
BAT
. Checking the TXD and RXD states make it
possible to determine the thermal excursion source
and to shut it down.
TABLE 1-1:
SOURCES OF THERMAL OVERLOAD
TXD
RXD
LIN Transmitter
(1)
Voltage
Regulator
(2)
Comments
x
L
L
H
x
L
H
ok
ok
Normal function
LIN transmitter and regulator shutdown
LIN transmitter shutdown
Regulator shutdown
output overload
short circuit
ok
output overload
ok
output overload
H/L
Legend:
Note 1:
x = Don’t care, L = Low, H = High
LIN transceiver overload current on the LIN pin is > 200 mA.
Voltage regulator overload current on V
REG
is > 50 mA.
2:
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| MCP201-E | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:LIN Transceiver with Voltage Regulator |
| MCP201-E/P | 功能描述:LIN 收發(fā)器 W/ On Board Vreg RoHS:否 制造商:NXP Semiconductors 工作電源電壓: 電源電流: 最大工作溫度: 封裝 / 箱體:SO-8 |
| MCP201-E/SN | 功能描述:LIN 收發(fā)器 W/ On Board Vreg RoHS:否 制造商:NXP Semiconductors 工作電源電壓: 電源電流: 最大工作溫度: 封裝 / 箱體:SO-8 |
| MCP201-EMF | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:LIN Transceiver with Voltage Regulator |
| MCP201-EP | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:LIN Transceiver with Voltage Regulator |
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