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PDF 33399 Data sheet ( Hoja de datos )
| Número de pieza | 33399 | |
| Descripción | Local Interconnect Network (LIN) Physical Interface | |
| Fabricantes | Freescale Semiconductor | |
| Logotipo |  |
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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 k internal 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
1 page  
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 3. Static Electrical Characteristics
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
VSUP PIN (DEVICE POWER SUPPLY)
Supply Voltage Range
Supply Current in Sleep Mode
VLIN > VSUP -0.5 V, VSUP < 14 V
14 V VSUP < 18 V
Supply Current in Normal Mode
Recessive State
Dominant State, Total Bus Load > 500
Supply Undervoltage Threshold
RXD OUTPUT PIN (LOGIC)
VSUP
IS1
IS2
IS(REC)
IS(DOM)
VSUP_UV
7.0
—
—
—
—
5.5
13.5
20
—
—
—
6.4
18 V
A
50
150
mA
2.0
3.0
6.8 V
Low-Level Output Voltage
IIN 1.5 mA
High-Level Output Voltage
IOUT
VOL
VOH
V
0.0 — 0.9
V
3.75 — 5.25
TXD INPUT PIN (LOGIC)
Low-Level Input Voltage
High-Level Input Voltage
Input Voltage Threshold Hysteresis
Pullup Current Source
1.0 V < VTXD < 4.0 V, VEN = 5.0 V
VIL — — 1.5 V
VIH 3.5 — — V
VINHYST
100
550
800 mV
IPU A
-50 — -25
EN INPUT PIN (LOGIC)
Low-Level Input Voltage
High-Level Input Voltage
Input Voltage Threshold Hysteresis
EN Low-Level Input Current
VIN = 1.0 V
High-Level Input Current
VIN = 4.0 V
Pulldown Current
1.0 V < EN < 4.0 V
VIL — — 1.5 V
VIH 3.5 — — V
VINHYST
100
480
800 mV
IIL A
5.0 20 30
IIH A
— 20 40
IPD A
— 20 —
Analog Integrated Circuit Device Data
Freescale Semiconductor
33399
5
5 Page 
INHIBIT OUTPUT PIN (INH)
The INH pin controls an external switchable voltage
regulator having an inhibit input. This pin is a high side switch
structure to VSUP. When the device is in the Normal mode,
the inhibit high side switch is turned ON and the external
voltage regulator is activated. When the device is in Sleep
mode, the inhibit switch is turned OFF and disables the
voltage regulator (if this feature is used).
A wake-up event on the LIN bus line will switch the INH pin
to VSUP level. Wake-up output current capability is limited to
280 µA. INH can also drive an external MOSFET connected
to an MCU IRQ or XIRQ input to generate an interrupt. See
the typical application illustrated in Figure 13, page 15.
WAKE INPUT PIN (WAKE)
The WAKE pin is a high voltage input used to wake up the
device from Sleep mode. WAKE is usually connected to an
external switch in the application. The typical WAKE
thresholds are VSUP/2.
The WAKE pin has a special design structure and allows
wake-up from both HIGH-to-LOW or LOW-to-HIGH
transitions. When entering the Sleep mode, the LIN monitors
the state of the WAKE pin and stores it as a reference state.
The opposite state of this reference state will be the wake-up
event used by the device to re-enter Normal mode.
An internal filter is implemented (50 s typical filtering time
delay). The WAKE pin input structure exhibits a high
impedance with extremely low input current when voltage at
this pin is below 14 V. When voltage at the WAKE pin
exceeds 14 V, input current starts to sink into the device. A
series resistor should be inserted in order to limit the input
current, mainly during transient pulses. Recommended
resistor value is 33 k.
Important The WAKE pin should not be left open. If the
wake-up function is not used, WAKE should be connected to
GND to avoid false wake-up.
FUNCTIONAL DESCRIPTION
INTRODUCTION
Analog Integrated Circuit Device Data
Freescale Semiconductor
33399
11
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet 33399.PDF ] | |
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