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33399 Schematic ( PDF Datasheet ) - Freescale Semiconductor

Teilenummer 33399
Beschreibung Local Interconnect Network (LIN) Physical Interface
Hersteller Freescale Semiconductor
Logo Freescale Semiconductor Logo 




Gesamt 19 Seiten
33399 Datasheet, Funktion
Freescale Semiconductor
Technical Data
Document Number: MC33399
Rev. 10.0, 4/2013
Local Interconnect Network
(LIN) Physical Interface
33399
Local interconnect network (LIN) is a serial communication
protocol designed to support automotive networks in conjunction with
controller area network (CAN). As the lowest level of a hierarchical
network, LIN enables cost-effective communication with sensors and
actuators when all the features of CAN are not required. This device
is powered by SMARTMOS technology.
The 33399 is a physical layer component dedicated to automotive
sub-bus applications. It offers communication speed from 1.0 kbps to
20 kbps, and up to 60 kbps for programming mode. It has two
operating modes: Normal and Sleep.
The 33399 supports LIN protocol specification 1.3.
Features
• Nominal operation from VSUP 7.0 to 18 V DC, functional up to
27 V DC battery voltage and capable of handling 40 V during load
dump
• Active bus waveshaping to minimize radiated emission
±5.0 kV ESD on LIN Bus Pin, ±4.0 kV ESD on other pins
• 30 kinternal pull-up resistor
• Ground shift operation and ground disconnection Fail-safe at
module level
• An unpowered node does not disturb the network
• 20 µA in Sleep mode
• Wake-up capability from LIN Bus, MCU command and dedicated
high voltage wake-up input (interface to external switch)
• Interface to MCU with CMOS compatible I/O pins
• Control of external voltage regulator
LIN PHYSICAL INTERFACE
EF SUFFIX (PB-FREE)
98ASB42564B
8 PIN SOICN
ORDERING INFORMATION
Device
(Add R2 Suffix for
Tape and Reel)
Temperature
Range (TA)
Package
MC33399PEF
-40 to 125 °C
8 SOICN
VPWR
Regulator
12 V
5.0 V
MCU
33399
VSUP WAKE
INH
GND
EN
TXD
RXD LIN
Figure 1. 33399 Simplified Application Diagram
Freescale Semiconductor, Inc. reserves the right to change the detail specifications,
as may be required, to permit improvements in the design of its products.
© Freescale Semiconductor, Inc., 2006-2013. All rights reserved.
LIN Bus






33399 Datasheet, Funktion
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 3. Static Electrical Characteristics (continued)
Characteristics noted under conditions 7.0 V VSUP 18 V, -40C TA 125C, GND = 0 V unless otherwise noted. Typical
values noted reflect the approximate parameter means at TA = 25 °C under nominal conditions unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max Unit
LIN PIN (VOLTAGE EXPRESSED VERSUS VSUP VOLTAGE)
Low Level Bus Voltage (Dominant State)
TXD LOW, VLIN = 40 mA
High Level Voltage (Recessive State)
TXD HIGH, IOUT = 1.0 A
Internal Pullup Resistor to VSUP (4)
-40 °C TA 70 °C
70 °C < TA 125 °C
Current Limitation
TXD LOW, VLIN = VSUP
Leakage Current to GND
Recessive State, VSUP - 0.3 V VLIN VSUP (4)
VSUP Disconnected, -18 V VLIN 18 V (Excluding Internal Pull-up
Source)
VSUP Disconnected, VLIN = -18 V (Including Internal Pull-up Source)
VSUP Disconnected, VLIN = +18 V (Including Internal Pull-up Source)
LIN Receiver, Low Level Input Voltage
TXD HIGH, RXD LOW
LIN Receiver, High Level Input Voltage
TXD HIGH, RXD HIGH
LIN Receiver Threshold Center
(VLINH - VLINL) / 2
LIN Receiver Input Voltage Hysteresis
VLINH - VLINL
LIN Wake-up Threshold Voltage
INH OUTPUT PIN
VDOM
VREC
RPU
I LIM
I LEAK
0.0 —
0.85 VSUP
20 30
35 49
50 150
0.0 —
-40 —
V
1.4
V
k
47
60
mA
200
A
10
40
V LINL
V LINH
V LINTH
V LINHYS
V LINWU
— -600 —
— 15 —
0 VSUP
— 0.4 VSUP
0.6 VSUP
— VSUP/2
VSUP
0.05 VSUP — 0.15 VSUP
3.5 4.5 6.0
V
V
V
V
V
High Level Voltage (Normal Mode)
Leakage Current (Sleep Mode)
0 < VINH < VSUP
VWUH
I LEAK
VSUP -0.8
0.0
VSUP
5.0
V
A
WAKE INPUT PIN
Typical Wake-Up Threshold (EN = 0 V, 7.0 V VSUP 18 V) (5)
HIGH-to-LOW Transition
LOW-to-HIGH Transition
Wake-up Threshold Hysteresis
WAKE Input Current
VWAKE 14 V
VWAKE > 14 V
VWUTH
VWUHYS
I WU
0.3 VSUP
0.4 VSUP
0.1 VSUP
0.43 VSUP 0.55 VSUP
0.55 VSUP 0.65 VSUP
0.16 VSUP 0.2 VSUP
— 1.0 5.0
— — 100
V
V
A
Notes
4. A diode structure is inserted with the pullup resistor to avoid parasitic current path from LIN to VSUP.
5. When VSUP is greater than 18 V, the wake-up voltage thresholds remain identical to the wake-up thresholds at 18 V.
33399
Analog Integrated Circuit Device Data
6 Freescale Semiconductor

6 Page









33399 pdf, datenblatt
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
As described below and depicted in Figure 10 and Table 5
on page 13, the 33399 has two operational modes, normal
and sleep, and one transitional mode, Awake.
NORMAL MODE
This is the normal transmitting and receiving mode. All
features are available.
SLEEP MODE
In this mode the transmission path is disabled and the
device is in low power mode. Supply current from VSUP is
20 µA typical. Wake-up can occur from LIN bus activity, as
well as from node internal wake-up through the EN pin and
the WAKE input pin.
DEVICE POWER-UP (AWAKE TRANSITIONAL
MODE)
At system power-up (VSUP rises from zero), the 33399
automatically switches into the “Awakemode (refer to
Figure 10 below and Table 5 on page 13. It switches the INH
pin in HIGH state to VSUP level. The microcontroller of the
application then confirms the Normal mode by setting the EN
pin HIGH.
DEVICE WAKE-UP EVENTS
The device can be awakened from Sleep mode by three
wake-up events:
• LIN bus activity
• Internal node wake-up (EN pin)
• Wake-up from WAKE pin
Figures 7, 8, and 9 on page 9 show device application
circuit and detail of wake-up operations.
Wake-up from LIN Bus (Awake Transitional Mode)
A wake-up from the LIN pin switching from recessive to
dominant state (switch from VSUP to GND) can occur. This
is achieved by a node sending a wake-up frame on the bus.
This condition internally wakes up the interface, which
switches the INH pin to a HIGH level to enable the voltage
regulator. The device switches into the Awake mode. The
microcontroller and the complete application power up. The
microcontroller must switch the EN pin to a HIGH level to
allow the device to leave the Awake mode and turn it into
Normal mode in order to allow communication on the bus.
Wake-up from Internal Node Activity (Normal Mode)
The application can internally wake-up. In this case, the
microcontroller of the application sets the EN pin in the HIGH
state. The device switches into Normal mode.
Wake-up from WAKE Pin (Awake Transitional Mode)
The application can wake up with the activation of an
external switch. Refer to Table 1, 8-SOICN Pin Definitions on
page 3.
VPWR < 7.0 V
Power-Up/
Down
VPWR > 7.0 V
VPWR < 7.0 V
VPWR < 7.0 V
Sleep
LIN Bus or WAKE Pin
Wake-up
Awake
EN HIGH
EN HIGH (Local Wake-up Event)
Normal
1.0 to 20
kbps
EN LOW
Note Refer to Table 5 for explanation.
Figure 10. Operational and Transitional Modes State Diagram
33399
12
Analog Integrated Circuit Device Data
Freescale Semiconductor

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