Connecting people now and in the future
Automotive Ethernet
AEC-Q200 100BASE-TX and
1000BASE-T Ethernet Magnetics
Product Training
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Automotive Ethernet
The Automotive Market place is now becoming an expanding arena for showcasing the flexibility
and adaptiveness of traditional IEEE 802.3 Ethernet in the automotive environment.
The demand for more bandwidth is driven by the motorist and their needs:
INFOTAINMENT
- Audio, Video, SatNav, Phone, Media, Web connectivity
ADVANCED DRIVER
ASSIST (ADAS)
- Camera Systems (Park4U, Surround View) Lane change, Speed,
Braking and Blind spot and Collision warnings
ELECTRIC VEHICLE
- Battery Management system (BMS) – Cell protection and
Charge level display
CONNECTED/
SELF DRIVE CAR
- Car to Car and Car to Curb communication, Adaptive cruise
control and Self parking
All these added features and applications need fast, reliable connection between a variety of
sensors and control units.
Pulse Electronics has launched the “HMxxxxNL” series of AEC-Q200 Automotive
qualified parts for these applications
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AEC-Q Explained
What is AEC-Q?
 AEC-Q stands for the Automobile Engineering Council and the “Q” refers to the Quality
program that unifies the Automobile Industry across all the continents. It covers all electronic
components that can be used in the automotive market and is a set of accelerated stress
tests which have to be passed.
AEC-Q100
Covers Active components (Silicon diode, Processors, PHYs, LEDs)
AEC-Q200
Covers Passive components (Inductors, Resistors, Capacitor, etc.)
Note: Pulse products fall under AEC-Q200 requirements
What does it do?
 Each type of component has a specific table of requirements which have to be meet in
design, production, and if any changes are made.
The five major tests for Pulse “HM” series of transformers are :
Temperature exposure 1000 hours at maximum operating limit (i.e. 105oC)
Thermal Shock
1000 cycles from lower to upper limit (i.e. -40oC to +125oC)
Moisture exposure
1000 hours 85oC/85% RH
Mechanical Vibration
5gs for 20mins, 12 cycles and 3 orientations
Heat & Solder Resist
Flammability and J-STD-002 - 245 -255oC or 260oC
Source: AEC_Q200_Rev.D June 2010
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AEC-Q200 Ethernet Magnetics
 Key Functions
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Provide highly reliable product by design and testing
Provide safety isolation of 1500Vrms, 60seconds minimum
Support AutoMDIX - TX and RX can be swapped
Provide common mode noise rejection for improved EMI performance
Center-Taps (CT)
Cable Side
Chip (IC) Side
1:1
Isolation Transformer
Common-mode choke
Figure 1 – Basic Schematic (one channel shown)
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Pulse AEC-Q200 Ethernet Magnetics
 Key Features
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Fully qualified to AEC-Q200
Operating temperature -40°C up to +125°C
Industry standard SMD footprints
Multiple packaging options
RoHS and REACH compliant
Meets IEEE 802.3u/ab standards and supports
AutoMDIX
 Production released, parts are available in distribution
 TS-19649 certification capable
Automotive Temperature Grade
Temperature
Grade
Grade 0
Grade 1
Grade 2
Grade 3
Grade 4
Min.
Max.
-40°C
-40°C
-40°C
-40°C
0°C
+150°C
+125°C
+105°C
+85°C
+70°C
Pulse Part List- AEC-Q200 Ethernet Magnetics
Part Number
Speed
# of Ports
Operating Temp.
HM0068ANL
100BASE-TX
Single
-40°C to +105°C
HM1188NL
100BASE-TX
Single
-40°C to +105°C
HM1234FNL
100BASE-TX
Dual
-40°C to +105°C
HM1225NL
100BASE-TX
Single
-40°C to +95°C
HM5004EFNL
1000BASE-T
Single
-40°C to +105°C
HM5149NL
1000BASE-T
Single
-40°C to +125°C
HM6098FNL
1000BASE-T, POE+ Single
-40°C to +105°C
HM-Series Ethernet Transformers
Note: Additional package options and Operating temp. available upon request
Pulse Electronics - All material is Company Confidential
AEC-Q200 Ethernet Magnetics
 PCB Layout Recommendations
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Keep signal traces from IC to magnetics module as short as possible.
Avoid PCB traces with 90-degree bends.
Ensure that there is no contiguous ground plane underneath the module.
Using BST (75Ω resistors and high voltage capacitor to chassis ground) to terminate cable side
CTs is advisable for best EMI performance.
 Follow PHY manufacture’s application notes for further layout suggestions
 Follow suggested land pattern per Pulse datasheets. A few examples are listed below.
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Typical Applications - Infotainment
Ethernet Audio Video Bridging (AVB) used to
link variety of devices over 2 x Twisted Pair:
Video/audio
Head Units &
Switch
Transmit
PMD
MLT-3
MII
100Base-TX PHY
(Fast Ethernet)
4B/5B
Uni-Direct onal; per Twisted Pair 100MBit/s, 125MBaud
Bluetooth &
Wi-Fi
Receive
Information
Display
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Instrument Display Panel
Passenger Display (Front/Back)
Blu-ray, DVD players
CD / Radio receivers
Amplifiers
GPS Navigation system
3G/4G Phone and Data hub
External Inputs – Game Consoles
Internal Wi-Fi Hot-Spot
Rear Camera
LCD
LCD
S w itc h
Multichannel
Amplifier
GPS &
Satellite
Link
CD / DVD
Player
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Rear View
Camera
Typical Applications – Battery Management Systems
Linear Tech LTC6804 Multicell Battery Monitors
 Measures Up to 12 Battery Cells in Series
 Stackable Architecture Supports 100s of Cells
 Built-In isoSPI™ Interface:
 1Mbps Isolated Serial Communications
 Uses a Single Twisted Pair, Up to 100 Meters
 Low EMI Susceptibility and Emissions
HM1190NL = Single channel 2500V isolation
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Thank You
Pulse Electronics - All material is Company Confidential