|
|
PDF MCP2022P Data sheet ( Hoja de datos )
| Número de pieza | MCP2022P | |
| Descripción | LIN Transceiver | |
| Fabricantes | Microchip | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MCP2022P (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
MCP2021/2/1P/2P
LIN Transceiver with Voltage Regulator
Features:
• The MCP2021/2/1P/2P are Compliant with LIN
Bus Specifications 1.3, 2.1 and are Compliant to
SAE J2602-2
• Support Baud Rates up to 20 kBaudwith
LIN-compatible Output Driver
• 43V Load Dump Protected
• Very Low EMI Meets Stringent OEM Requirements
• Wide Supply Voltage, 6.0V-18.0V Continuous:
- Maximum input voltage of 30V
• Extended Temperature Range: -40 to +125°C
• Interface to PIC® EUSART and Standard USARTs
• Local Interconnect Network (LIN) Bus Pin:
- Internal pull-up resistor and diode
- Protected against ground shorts
- Protected against loss of ground
- High-current drive
• Automatic Thermal Shutdown
• On-Chip Voltage Regulator:
- Output voltage of 5.0V with tolerances of
±3% overtemperature range
- Available with alternate output voltage of
3.3V with tolerances of ±3% overtemperature
range
- Maximum continuous input voltage of 30V
- Internal thermal overload protection
- Internal short circuit current limit
- External components limited to filter capacitor
and load capacitor
• Two Low-Power modes:
- Receiver On, Transmitter Off, Voltage
Regulator On ( 85 µA)
- Receiver Monitoring Bus, Transmitter Off,
Voltage Regulator Off ( 16 µA)
Description:
The MCP2021/2/1P/2P provides a bidirectional, half-
duplex communication physical interface to automotive
and industrial LIN systems that meets the LIN bus
specification Revision 2.1 and SAE J2602-2. The
devices incorporate a voltage regulator with 5V at
50 mA or 3.3V at 50 mA regulated power-supply
outputs.
The regulator is short-circuit protected, and is protected
by an internal thermal shutdown circuit. The device has
been specifically designed to operate in the automotive
operating environment and will survive all specified
transient conditions while meeting all of the stringent
quiescent current requirements.
The MCP2021/2/1P/2P family of devices includes the
following packages.
8-pin PDIP, DFN and SOIC packages:
• MCP2021-330, LIN-compatible driver, 8-pin, 3.3V
regulator, wake up on dominant level of LBUS
• MCP2021-500, LIN-compatible driver, 8-pin, 5.0V
regulator, wake up on dominant level of LBUS
• MCP2021P-330, LIN-compatible driver, 8-pin,
3.3V regulator, wake up at falling edge of LBUS
voltage
• MCP2021P-500, LIN-compatible driver, 8-pin,
5.0V regulator, wake up at falling edge of LBUS
voltage
14-pin PDIP, TSSOP and SOIC packages with RESET
output:
• MCP2022-330, LIN-compatible driver, 14-pin,
3.3V regulator, RESET output, wake up on
dominant level of LBUS
• MCP2022-500, LIN-compatible driver, 14-pin,
5.0V regulator, RESET output, wake up on
dominant level of LBUS
• MCP2022P-330, LIN-compatible driver, 14-pin,
3.3V regulator, RESET output, wake up at falling
edge of LBUS voltage
• MCP2022P-500, LIN-compatible driver, 14-pin,
5.0V regulator, RESET output, wake up at falling
edge of LBUS voltage
2005-2014 Microchip Technology Inc.
DS20002018H-page 1
1 page  
1.0 DEVICE OVERVIEW
The MCP2021/2/1P/2P 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 MCP2021/2/1P/2P 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 2.0 requires that the
transceiver(s) of all nodes in the system be connected
via the LIN pin, referenced to ground, and with a
maximum external termination resistance load of 510Ω
from LIN bus to battery supply. The 510Ωcorresponds
to one Master and sixteen Slave nodes.
The MCP2021/2/1P/2P-500 provides a +5V, 50 mA,
regulated power output. The regulator uses an LDO
design, is short-circuit protected, and will turn the
regulator output off if it falls below 3.5V.
The MCP2021/2/1P/2P also includes
thermal-shutdown protection.
The regulator is specifically designed to operate in the
automotive environment and will survive +43V load
dump transients, double-battery jumps, and reverse
battery connections when a reverse blocking diode is
used. The other members of the
MCP2021/2/1P/2P-330 family output +3.3V at 50 mA
with a turn-off voltage of 2.5V. (See Section 1.6
“Internal Voltage Regulator”).
MCP2021/2 wakes from Power-Down mode on a
dominant level on LBUS. MCP2021P/2P wakes at a
transition from recessive level to dominant level on
LBUS.
1.1 Optional External Protection
1.1.1 REVERSE BATTERY PROTECTION
An external reverse-battery-blocking diode should be
used to provide polarity protection (see Figure 1-6).
1.1.2
TRANSIENT VOLTAGE
PROTECTION (LOAD DUMP)
An external 43V transient suppressor (TVS) diode,
between VBB and ground, with a 50Ω transient protec-
tion resistor (RTP) in series with the battery supply and
the VBB pin, protect the device from power transients
(see Figure 1-6) and ESD events. While this protection
is optional, it is considered good engineering practice.
The resistor value is chosen according to Equation 1-1.
MCP2021/2/1P/2P
EQUATION 1-1:
RTP (VBBmin - 5.5) / 250 mA.
5.5V = VUVLO + 1.0V,
250 mA is the peak current at Power-On when
VBB = 5.5V
1.2 Internal Protection
1.2.1 ESD PROTECTION
For component-level ESD ratings, please refer to the
Section 2.1 “Absolute Maximum Ratings†”.
1.2.2 GROUND LOSS PROTECTION
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 high-impedance level.
1.2.3 THERMAL PROTECTION
The thermal protection circuit monitors the die tem-
perature and is able to shut down the LIN transmitter
and voltage regulator if it detects a thermal overload.
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
environmental temperature
Driving the TXD and checking the RXD pin makes it pos-
sible to determine whether there is a bus contention
(i.e., RXD = low, TXD = high) or a thermal overload con-
dition (i.e., RXD = high, TXD = low).
2005-2014 Microchip Technology Inc.
DS20002018H-page 5
5 Page 
MCP2021/2/1P/2P
TABLE 1-1: OVERVIEW OF OPERATIONAL MODES
State
POR
Ready
Operation
Power-Down
Transmitter-Off
Transmitter Receiver
OFF
OFF
OFF
ON
ON ON
OFF
Activity
Detect
OFF
ON
Voltage
Regulator
Operation
Comments
OFF
ON
Read VBB; if VBB > 5.75V,
proceed to Ready mode
MCP2021/2:
Bus OFF
If CS/LWAKE is high level, then proceed to state
Operation mode.
MCP2021P/2P:
If CS/LWAKE is high level and FAULT/TXE
is high level, then proceed to Operation
mode.
If CS/LWAKE is high level and FAULT/TXE
is low level, then proceed to TXOFF mode.
ON If CS/LWAKE is low level, then proceed to Normal
Power-Down mode.
Operation
If FAULT/TXE is low level or TXD/LBUS
mode
permanent dominant is detected, then
proceed to Transmitter-Off mode.
OFF
On LIN bus falling, go to Ready mode. On
CS/LWAKE high level, go through Ready
mode; then, to either operation or
Transmitter-Off mode (refer to Figure 1-2
and Figure 1-3).
Low-Power
mode
ON If CS/LWAKE is low level, then proceed to
Power-Down mode.
If FAULT/TXE is high, then proceed to
Operation mode.
2005-2014 Microchip Technology Inc.
DS20002018H-page 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MCP2022P.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MCP2022 | LIN Transceiver |  Microchip Technology |
| MCP2022A | LIN Transceiver | Microchip |
| MCP2022P | LIN Transceiver | Microchip |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |