Communication BUS Varistor
GENERAL DESCRIPTION
The CAN BUS and FlexRay varistor is a zinc oxide (ZnO) based ceramic semiconductor device
with non-linear voltage-current characteristics (bi-directional) similar to back-to-back Zener
diodes and an EMC capacitor in parallel (see equivalent circuit model). They have the added
advantage of greater current and energy handling capabilities as well as EMI/RFI attenuation.
Devices are fabricated by a ceramic sintering process that yields a structure of conductive ZnO
grains surrounded by electrically insulating barriers, creating varistor like behavior.
AVX Communication Bus Varistors offer the advantages of large in-rush current capability, low
capacitance to minimize signal distortion, fast turn on time to conservatively clamp the energy
before its maximum and off state EMI filtering through their bulk capacitance. These features
coupled with an extremely low FIT rate and excellent process capability make an ideal device for
today's automotive or general circuit protection.
GENERAL
CHARACTERISTICS
• Operting Teperature: -55°C to +125°C
• Working Voltage: ≤18Vdc
• Case Size: 0402, 0603
0405 2xArray
0612 4xArray
FEATURES
• Compact footprint
• High ESD capability (25kV)
• High Inrush Current (8x20μs)
• EMI/RFI Attenuation
• Low Capacitance/Low Insertion Loss
• Very Fast Response Time
• High Reliability <0.1 FIT
• AEC-Q200 Qualified
APPLICATIONS
• Communication Bus:
CAN Bus, FlexRay, etc.
• General I/O Protocols
• Keyboard Interfaces
• Datalines
• Sensors
• Capacitance sensitive applications
and more
HOW TO ORDER
CAN
Style
CAN = CAN BUS
FLX = FlexRay
0001
Case Size
0001 = 0603 Discrete
0002 = 0405 2-Element
0003 = 0405 2-Element
0004 = 0612 4-Element
0005 = 0402 Discrete
0006 = 0402 Discrete
0007 = 0603 Discrete
D
P
Packaging Code
Termination
(Reel Size)
P = Ni/Sn
D = 7" reel (1,000 pcs.)
(Plated)
R = 7" reel (4,000 pcs.)
T = 13" reel (10,000 pcs.)
W = 7" reel (10,000 pcs.) 0402 only
PERFORMANCE CHARACTERISTICS
AVX PN
CAN0001 _ _
CAN0002 _ _
CAN0003 _ _
CAN0004 _ _
CAN0005 _ _
CAN0006 _ _
CAN0007 _ _
FLX0005 _ _
V
W
(DC)
≤ 18
≤ 18
≤18
≤ 18
≤ 18
≤18
≤ 32.0
≤ 18
V
W
(AC)
≤ 14
≤ 14
≤14
≤ 14
≤ 14
≤14
≤ 25.0
≤ 14
V
B
120
70
28.5
100
33
26
61
26
V
C
225
145
50
180
55
45
120
45
I
VC
1
1
1
1
1
1
1
1
I
L
2
2
5
2
2
5
5
5
E
T
0.015
0.015
0.02
0.015
0.05
0.02
0.05
0.02
I
P
4
4
15
4
10
4
5
4
Cap
22 Max
22 Max
50 Max
22 Max
37 Max
17 Max
15 Max
17 Max
Freq
M
M
M
M
M
M
M
M
V
Jump
27.5
27.5
27.5
27.5
27.5
27.5
27.5
27.5
P
Diss Max
0.003
0.003
0.0008
0.003
0.01
0.004
0.003
0.004
Case
0603
0405
0405
0612
0402
0402
0603
0402
Elements
1
2
2
4
1
1
1
1
Termination Finish Code
Packaging Code
V
W
(DC)
V
W
(AC)
V
B
V
C
I
VC
DC Working Voltage (V)
AC Working Voltage (V)
Typical Breakdown Voltage (V @ 1mA
DC
)
Clamping Voltage (V @ I
VC
)
Test Current for V
C
(A, 8x20μS)
I
L
E
T
I
P
Cap
Temp Range
Maximum Leakage Current at the Working Voltage (μA)
Transient Energy Rating (J, 10x1000μS)
Peak Current Rating (A, 8x20μS)
Maximum Capacitance (pF) @ 1 MHz and 0.5Vrms
-55ºC to +125ºC
40
080216
Communication BUS Varistor
S21 CHARACTERISTICS
10.0
Insertion Loss (dB)
0.0
-10.0
-20.0
-30.0
-40.0
-50.0
0
1
CAN0001
Insertion Loss (dB)
5
0
-5
-10
-15
-20
-25
-30
0.1
10
100
CAN0005
1000
FLX0005
10000
1
10
100
1000
10000
Frequency (MHz)
CAN0007
Frequency (MHz)
TYPICAL MLV IMPLEMENTATION
MultiLayer Varistors (MLVs)
XCVR
BUS
XCVR
TVS Diodes
BUS
EMC
CAP
TYPICAL PULSE RATING CURVE
Typical Pulse Rating Curve
Peak Power (W)
10000
1000
100
10
10
100
1000
10000
MLV PROTECTION METHOD
SINGLE COMPONENT SOLUTION
TVS & EMI
DIODE PROTECTION METHOD
THREE COMPONENT SOLUTION
TVS + EMI
Pulse Duration (µS)
EQUIVALENT CIRCUIT MODEL
Discrete MLV Model
PCB
Trace
L
P
To Device
Requiring
Protection
Where: R
v
R
p
=
≥
Voltage Variable resistance (per VI curve)
10
12
Ω
defined by voltage rating and energy level
turn on resistance
parallel body inductance
R
V
C
R
P
C
=
R
on
=
=
L
p
Ron
Solder Pad
080216
41
Communication BUS Varistor
TYPICAL CAN BUS IMPLEMENTATION
SCHEME
V
CC
TxD
CAN_H
ECU
Split
TYPICAL FLEX RAY IMPLEMENTATION
SCHEME
V
CC
BP
Vcc
RxD
BM
TX
D
Transceiver
CAN_L
V1
V1
V2
V2
PHYSICAL DIMENSIONS
0402 Discrete
Length
Width
Thickness
Term Band Width
1.00 ±0.10 (0.040 ±0.004)
0.50 ±0.10 (0.020 ±0.004)
0.60 Max. (0.024 Max.)
0.25 ±0.15 (0.010 ±0.006)
mm (inches)
0603 Discrete
1.60 ±0.15 (0.063 ±0.006)
0.80 ±0.15 (0.032 ±0.006)
0.90 Max. (0.035 Max.)
0.35 ±0.15 (0.014 ±0.006)
0405 Array
1.00 ±0.15 (0.039 ±0.006)
1.37 ±0.15 (0.054 ±0.006)
0.66 Max. (0.026 Max.)
0.36 ±0.10 (0.014 ±0.004)
0612 Array
1.60 ±0.20 (0.063 ±0.008)
3.20 ±0.20 (0.126 ±0.008)
1.22 Max. (0.048 Max.)
0.41 ±0.10 (0.016 ±0.010)
SOLDER PAD DIMENSIONS
0402/0603 Discrete
0405 Array
E
D
mm (inches)
0612 Array
E
D
A
A
A
B
C
C
B
C
B
A
B
A
0402 Discrete
0603 Discrete
0.61
(0.024)
0.89
(0.035)
0.46
(0.018)
0.89
(0.035)
B
0.51
(0.020)
0.76
(0.030)
0.74
(0.029)
1.65
(0.065)
C
1.70
(0.067)
2.54
(0.100)
0.12
(0047)
2.54
(0.100)
D
–
–
0.38
(0.015)
0.46
(0.018)
E
–
–
0.64
(0.025)
0.76
(0.030)
0402, 0603
Discrete
0405
Array
0612
Array
0405 Array
0612 Array
42
080216
Communication BUS Varistor
APPLICATION
AVX CAN BUS and FlexRay varistors offer
significant advantages in general areas of a
typical CAN or FlexRay network as shown
on the right. Some of the advantages over
diodes include:
• space savings
• higher ESD capability @ 25kV contact
• higher in rush current (4A) 8 x 20μS
• FIT rate ≤0.1 failures (per billion hours)
LEDS
Lamps
= CAN0001
= MultiGuard
= Feedthru Cap
= Tantalum
Tachometer
(Stepper Motor)
Lamp/
LED Drvr
BATT
8V Reg
Gauge
Motor
Drvr
Speedometer
(Stepper Motor)
5V Reg
CAN
BUS
NTC Based
Temp. Sensor
Physical
Interface
F lL
l
MCU
LCD
Module
DDC
FlexRay
TM
CAN
Wheel Node
Wheel Node
Powertrain
Body Control
Module/CAN
Gateway
X-by-Wire Master
Smart
Junction Box
Instrument
Cluster
Dash Board
Node
Door
Module
HVAC
Wheel Node
Wheel Node
080216
43
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