Application guide: ESD protection

Application guide: ESD protection
For automotive and industrial applications: car infotainment,
body control modules, video cameras, industrial computers,
and test & measurement equipment
Contents
1. Automotive interfaces........................................................................................................................................................... 4
1.1 CAN...................................................................................................................................................................................... 4
1.2 LIN........................................................................................................................................................................................ 5
1.3 FlexRay ................................................................................................................................................................................ 6
1.4 Car Infotainment.................................................................................................................................................................. 7
2. NFC antennas......................................................................................................................................................................... 8
3. General I/O Protection.......................................................................................................................................................... 9
3.1 Digital I/O ........................................................................................................................................................................... 9
3.2 Analog I/O......................................................................................................................................................................... 10
3.3 Low-voltage comparator................................................................................................................................................... 11
4. Serial buses............................................................................................................................................................................ 12
4.1 Legacy: I2C......................................................................................................................................................................... 12
This document offers a lineup
4.2 Legacy: SPI/SSI.................................................................................................................................................................. 13
of commonly found interfaces
4.3 Legacy: RS-232 and RS-485.............................................................................................................................................. 14
along with suggested methods
4.4 USB2.0 and USB OTG........................................................................................................................................................ 15
for protecting against ESD and/
4.5 USB 3.0.............................................................................................................................................................................. 16
4.6 eSATA................................................................................................................................................................................. 17
4.7 High-speed Differential Mode signaling (LVDS, CML, TMDS, etc.).................................................................................. 18
5. Display interfaces.................................................................................................................................................................. 19
5.1 HDMI.................................................................................................................................................................................. 19
5.2 DisplayPort........................................................................................................................................................................ 20
or surges. For each interface
we show example circuits and
present a lineup of recommended
solutions from NXP. In all cases,
6. Ethernet................................................................................................................................................................................ 21
the shown lineup is a subset of the
6.1 Ethernet ESD protection................................................................................................................................................... 19
total number of possible solutions
6.2 BroadR-Reach ESD protection.......................................................................................................................................... 20
NXP can offer. Please direct any
7. RF........................................................................................................................................................................................... 23
7.1 GPS /GNSS......................................................................................................................................................................... 19
7.2 WLAN................................................................................................................................................................................. 20
8. Support tools........................................................................................................................................................................ 23
questions or concern feel to your
local NXP representative for
further details and information.
2
Introduction
NXP – your partner for ESD protection
ESD protection has been an important part of electronic design for many
years. Now, as integration levels continue to increase, and process geometries
continue to shrink, the ESD-induced damage is a more present threat than
ever before. Add this to the growing demand for portable electronics, and ESD
protection has become an essential issue at the system level.
Adding comprehensive ESD protection to a system isn’t just smart engineering,
it’s also a low-cost, easy way to prevent problems later in the product life cycle:
An ESD problem that remains hidden in a system, poses an increased risk of
field failures, reduced system life, and other quality-related problems that are
difficult to manage and expensive to resolve. The after-market costs associated
with field repair and product recalls can be crippling, and quality issues can do
What you get when you choose NXP for ESD protection
 Greater system-level immunity (IEC61000-4-2 level 4 standard and
beyond)
 Ultra-low clamping voltages, to safeguard even the latest, smallest
geometries in SoC devices
 Minimized impact on bus and interface signal integrity
 Low leakage current, for maximum energy efficiency and minimum
distortion on analog interfaces
 Arrays that combine multiline protection in single devices
 Packages that simplify PCB design for optimized layouts
serious harm to the brand reputation.
NXP offers more than 400 protection devices, ranging from single-protection
diodes to complete, highly integrated companion ICs. Our ESD solutions are
offered in a wide package portfolio, ranging from leaded to leadless packages.
Moreover, package innovations like solderable side pads enable visual
inspection while a package innovation like pass-through routing assures an
optimal board layout as well as enhanced ESD protection as the device can be
positioned closed to the interface.
Automotive
Industrial
This application guide covers automotive and industrial applications. But what
you see here is just the tip of the iceberg. For a full listing of our most up-todate ESD protection solutions, visit www.nxp.com/circuit-protection.
3
1. Automotive interfaces
1.1 CAN
NXP’s solutions protect two automotive
Controller Area Network (CAN) bus lines
from the damage caused by ESD and other
transients. They can be used with highspeed and fault-tolerant CAN buses.
CAN system architecture with a single device to protect the CAN node
Selection guide
Part
Package
Size (mm)
ESD robustness
(IEC61000-4-2)
Cd (max)
Pppm at tp = 8/20µs
VRWM
AEC-Q101
Note
PESD2IVN-U
SOT323
2.0 x 1.25 x 0.95
18 kV
11 pF
150 W
26.5 V
Yes
NEW
PESD1CAN-U
SOT323
2.0 x 1.25 x 0.95
23 kV
12 pF
150 W
24 V
Yes
PESD1CAN
SOT23
2.9 x 1.3 x 1.0
23 kV
17 pF
200 W
24 V
Yes
PESD2CAN
SOT23
2.9 x 1.3 x 1.0
30 kV
30 pF
230 W
24 V
Yes
4
1. Automotive interfaces
1.2 LIN
The PESD1LIN protects one automotive
Local Interconnect Network (LIN) bus line
from the damage caused by ESD and
other transients. Its asymmetrical internal
diode configuration ensures optimized
electromagnetic immunity for the protected
LIN ECU.
LIN system architecture with a single device to protect the LIN node
Selection guide
Part
Package
Size (mm)
ESD robustness
(IEC61000-4-2)
Cd (max)
Pppm at tp = 8/20µs
VRWM
AEC-Q101
Note
PESD1IVN-U
SOT323
2.0 x 1.25 x 0.95
18 kV
11 pF
150 W
26.5 V
Yes
NEW
PESD1LIN
SOD323
1.7 x 1.25 x 0.95
23 kV
17 pF
160 W
15/24 V
Yes
5
1. Automotive interfaces
1.3 FlexRay
The PESD1FLEX protects two automotive
FlexRay data lines from the damage caused
by ESD and other transients. It supports the
FlexRay data rate of 10 Mbit/s and provides
a surge capability of up to 200 W per line for
an 8/20 μs pulse.
!
FlexRay system architecture using a single device to protect the node
Selection guide
Part
Package
Size (mm)
ESD robustness
(IEC61000-4-2)
Cd (max)
Pppm at tp = 8/20µs
VRWM
AEC-Q101
Note
PESD2IVN-U
SOT323
2.0 x 1.25 x 0.95
18 kV
11 pF
150 W
26.5 V
Yes
NEW
PESD1FLEX
SOT23
2.9 x 1.3 x 1.0
23 kV
17 pF
200 W
24 V
Yes
6
1. Automotive interfaces
1.4 Car Infotainment
The PESD1LVDS is specifically designed
to provide ESD protection for the ultra
high-speed interfaces used for in-vehicle
networking, such as Low-Voltage Differential
Signaling (LVDS), High-Definition Multimedia
Interface (HDMI) and DisplayPort.
The device enables pass-through routing
for the TMDS lines which supports ease of
design and the minimization of parasitic
influences.
In LVDS systems, the PESD1LVDS provides ultra high-speed ESD protection that is fully AEC-Q101 compliant
The PESD1LVDS is AEC-Q101 qualified
and hence an ideal choice for high speed
interfaces in the automotive market.
Selection guide
Part
Package
Size (mm)
ESD robustness
(IEC61000-4-2)
Cd (max)
Cd Matching
VRWM
AEC-Q101
PESD1LVDS
DFN2510-10 (XSON10)
1.0 x 2.5 x 0.5
8 kV
0.6 pF
< 0.05 pF
5V
Yes
7
2. NFC antennas
Near Field Communication (NFC) is a standard that
supports user-friendly contactless ID functions.
Typical applications include contactless payment,
ticketing in public transport, and easy contactless
data transfer.
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In most NFC designs, the NFC antenna is connected
to the NFC controller IC via small contacts. These
contacts are an easy entry point for ESD strikes that
can damage the NFC controller IC. For this reason,
external ESD protection is highly recommended in
systems that use NFC.
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NXP co-created the NFC standard and founded the
NFC Forum. The PESD18VF1Bx and PESD24VF1Bx
devices are specifically designed to provide optimal
protection against ESD strikes in NFC systems, while
minimizing the impact that loading and/or impedance
mismatch can have on the sensitive antenna portion of
the design.
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NFC protection can reside at the antenna or%#''#"
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the filter and
the matching circuit
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Selection guide
$
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Size (mm)
ESD robustness
(IEC61000-4-2)
Cd (max)
IPPM
VRWM
Rdyn
Note
DSN0603-2
0.6 x 0.3 x 0.3
10 kV
0.45 pF
1A
18 V
0.6 Ω
NEW
DFN1006-2
1.0 x 0.6 x 0.48
10 kV
0.5 pF
1A
18 V
0.8 Ω
DFN1006-2
1.0 x 0.6 x 0.48
10 kV
0.45 pF
1A
24 V
0.8 Ω
Part
Package
PESD18VF1BSF
PESD18VF1BL
PESD24VF1BL
NEW
8
3. General I/O Protection
3.1 Digital I/O
There are many ways to protect generalpurpose digital I/O (GPIO). High-frequency
signaling is not typically applicable for
these kind of interfaces, so there’s no need
to optimize for low capacitive loading.
The three key elements to select upon are
unidirectional vs. bidirectional, one vs. multi
channel device and last but not least the
package variant. As shown in the table, there
are many standard devices that meet these
various requirements.
Bidirectional and unidirectional ESD protection for GPIO
Selection guide
Part
Package
Size (mm)
ESD robustness
(IEC61000-4-2)
Configuration
PESD5Z6.0
SOD523
1.2 x 0.8 x 0.6
30 kV
1 channel unidirectional
PESD3V3U1UL
DFN1006-2
1.0 x 0.6 x 0.48
9 kV
1 channel unidirectional
PESD5V0S1BL
DFN1006-2
1.0 x 0.6 x 0.48
30 kV
1 channel bidirectional
PESD5V0S1BA
SOD323
1.7 x 1.25 x 0.95
30 kV
1 channel bidirectional
30 kV
2 channel unidirectional/ 1 channel
bidirectional
PESD5V2S2UT
SOT23
2.9 x 1.3 x 1.0
BZA456A
SOT457
2.9 x 1.5 x 1.0
8 kV
4 channel unidirectional
PESD3V3S4UD
SOT457
2.9 x 1.5 x 1.0
30 kV
4 channel unidirectional
PESD5V0V1BL
DFN1006-2
1.0 x 0.6 x 0.48
30 kV
1 channel bidirectional
PESD5V0X1UALD
DFN1006D-2
1.0 x 0.6 x 0.37
15 kV
1 channel unidirectional
9
3. General I/O Protection
3.2 Analog I/O
Although the operating voltages for analog I/O are often
limited, most devices can tolerate relatively high voltages
for prolonged period without sustaining damage. For
ESD protection, this means the required reverse blocking
voltage (VRWM) must be sufficiently high to not conduct at
higher voltages.
Low leakage is another requirement for many analog I/O
systems. When implementing a fairly accurate analog input,
it’s recommended to limit any externally induced leakage
that loads the analog input. The protection structure must
minimize leakage currents.
NXP offers several devices that are ideal for industrial
analog I/O port protection, offering higher-than-standard
VRWM, lower leakage, and a small footprint to enable highdensity analog front-end designs.
Analog I/O protection using the PESD36VS1UL with single or multiple devices
Selection guide
Part
Package
Size (mm)
VRWM
ESD robustness
(IEC61000-4-2)
Configuration
PESD36VS1UL
DFN1006-2
1.0 x 0.6 x 0.48
36 V
30 kV
1 channel unidirectional
PESD24VU1UT
SOT23
2.9 x 1.3 x 1.0
24 V
30 kV
1 channel unidirectional
PESD24VS1UB
SOD523
1.2 x 0.8 x 0.6
24 V
23 kV
1 channel unidirectional
PESD36VS2UT
SOT23
2.9 x 1.3 x 1.0
36 V
30 kV
2 channel unidirectional
PESD24VS2UT
SOT23
2.9 x 1.3 x 1.0
24 V
23 kV
2 channel unidirectional
PESD12VV1BL
DFN1006-2
1.0 x 0.6 x 0.48
12 V
30 kV
1 channel bidirectional
PESD36VS1UJ
SOD323F
1.7 x 1.25 x 0.8
36 V
30 kV
PESD18VF1BL
DFN1006-2
1.0 x 0.6 x 0.48
18 V
10 kV
1 channel unidirectional
NEW
1 channel unidirectional
10
3. General I/O Protection
3.3 Low-voltage comparator
External ESD Protection for
Internal Microcontroller
Comparator
Many microcontrollers today integrate analog functions
such as a comparator. Depending on the connection to the
comparator input(s), ESD protection may be required.
Ext
input
As long as the comparator does not operate at a very high
speed, the protection device can be a standard device with
a standard capacitance.
Vref
Unidirectional, low-voltage comparator ESD protection
Selection guide
Part
Package
Size (mm)
ESD robustness
(IEC61000-4-2)
Configuration
PESD5Z6.0
SOD523
1.2 x 0.8 x 0.6
30 kV
1 channel unidirectional
PESD3V3U1UL
DFN1006-2
1.0 x 0.6 x 0.48
9 kV
1 channel unidirectional
PESD5V0S1BL
DFN1006-2
1.0 x 0.6 x 0.48
30 kV
1 channel bidirectional
PESD5V0S1BA
SOD323
1.7 x 1.25 x 0.95
30 kV
1 channel bidirectional
PESD5V2S2UT
SOT23
2.9 x 1.3 x 1.0
30 kV
2 channel unidirectional / 1 channel bidirectional
BZA456A
SOT457
2.9 x 1.5 x 1.0
8 kV
4 channel unidirectional
PESD3V3S4UD
SOT457
2.9 x 1.5 x 1.0
30 kV
4 channel unidirectional
PESD5V0V1BL
DFN1006-2
1.0 x 0.6 x 0.48
30 kV
1 channel bidirectional
PESD5V0X1UALD
DFN1006D-2
1.0 x 0.6 x 0.37
15 kV
1 channel unidirectional
11
SDA
SCL
4. Serial buses
4.1 Legacy: I2C
Rail to rail
with zener clamp
Rail to rail
high side to Vcc
I2C speeds range from the original 100 KHz up to 5 MHz
in Ultra Fast mode. The solutions shown here are more
tailored for I2C solutions running at speeds of 100 kHz
(standard) to 400 kHz (Fast Mode).
The figure represents two types of rail-to-rail protection,
which tends to offer better performance for high-speed
interfacing.
SDA
SDA
SCL
SCL
I2C protection two rail-to-rail configurations that minimize capacitive line loading
Selection guide
Part
Package
Size (mm)
No. of Lines
Cd
ESD robustness
(IEC61000-4-2)
NUP1301
SOT23
2.9 x 1.3 x 1.0
1
0.75 pF
30 kV
NUP1301U
SOT323
2.0 x 1.25 x 0.95
1
0.75 pF
30 kV
IP4220CZ6
SOT457
2.9 x 1.5 x 1.0
4
1 pF
8 kV
IP4221CZ6-S
DFN1410-6
1.45 x 1.0 x 0.48
4
1 pF
8 kV
PRTR5V0U4Y
SOT363
2.0 x 1.25 x 0.95
4
1 pF
8 kV
PRTR5V0U2X
SOT143B
2.9 x 1.3 x 1.0
2
1 pF
8 kV
PRTR5V0U2F
DFN1410-6
1.45 x 1.0 x 0.48
2
1 pF
8 kV
PRTR5V0U2AX
SOT143B
2.9 x 1.3 x 1.0
2
1.8 pF
12 kV
12
4. Serial buses
4.2 Legacy: SPI/SSI
The Serial Peripheral Interface (SPI), also known as the
Synchronous Serial Interface (SSI), is a synchronous serial
data link that has devices communicate in master/slave
mode. Common clock frequencies are in the range of 10
kHz to 100 MHz.
SPI protection might be required if a connection goes offboard or is routed through a connector. For low-frequency
operation, basic single-ended protection schemes may
suffice, but, given the upper limit of bus frequencies, railto-rail implementations are a better match for universal
protection.
SPI protection showing a single device with a four-line, rail-to-rail diode
Selection guide
Part
Package
Size (mm)
No. of Lines
Cd
ESD robustness
(IEC61000-4-2)
NUP1301
SOT23
2.9 x 1.3 x 1.0
1
0.75 pF
30 kV
NUP1301U
SOT323
2.0 x 1.25 x 0.95
1
0.75 pF
30 kV
IP4220CZ6
SOT457
2.9 x 1.5 x 1.0
4
1 pF
8 kV
IP4221CZ6-S
DFN1410-6
1.45 x 1.0 x 0.48
4
1 pF
8 kV
PRTR5V0U4Y
SOT363
2.0 x 1.25 x 0.95
4
1 pF
8 kV
PRTR5V0U2X
SOT143B
2.9 x 1.3 x 1.0
2
1 pF
8 kV
PRTR5V0U2F
DFN1410-6
1.45 x 1.0 x 0.48
2
1 pF
8 kV
PRTR5V0U2AX
SOT143B
2.9 x 1.3 x 1.0
2
1.8 pF
12 kV
13
4. Serial buses
4.3 Legacy: RS-232 and RS-485
NXP offers several devices that are well suited for
protection of RS-485 or RS-232 interfaces.
Unidirectional protection
The figure shows unidirectional protection with the
PESD15VS2UT, and bidirectional protection with the
PESD12LV2BT. An additional serial resistor can be used to
further limit currents entering the transceiver.
Transceiver
Bidirectional protection
Transceiver
Standard serial port, RS-485, or RS-232 protection can be either unidirectional or bidirectional
Selection guide
Part
Package
Size (mm)
No. of Lines
VRWM
ESD robustness
(IEC61000-4-2)
PESD15VS2UT
SOT23
2.9 x 1.3 x 1.0
2 unidirectional / 1 bidirectional
15 V
30 kV
PESD12VL2BT
SOT23
2.9 x 1.3 x 1.0
2 bidirectional
12 V
30 kV
14
4. Serial buses
4.4 USB2.0 and USB OTG
The USB 2.0 standard features a maximum signaling rate of 480 Mbit/s with
an effective throughput of up to 35 MByte/s or 280 Mbit/s.
USB 2.0 is a mainstream interface in today’s electronic systems and is one of
the most common interfaces used in microcontrollers.
The figure shows two basic protection setups, one for USB 2.0, and another
optimized for USB On-The-Go (OTG).
Dual-port implementations are commonly found in (embedded) computing
designs. Devices with protection optimized specifically for USB 2.0, such
as the IP4220CZ6 and PUSB2X4Y, are perfect fits for protecting dual-port
implementations.
Since OTG implementations are often portable, they tend to be smaller, so a
single-chip solution for protecting the Vbus, such as the PUSBMxx4-TL, is an
ideal choice.
USB 2.0 and USB OTG ESD protection
Selection guide
Part
Package
Size (mm)
Cd
ESD robustness
(IEC61000-4-2)
PUSB2X4Y
PUSB2X4D
PESD5V0F5UV
PUSBMxxVX4-TL
PESD5V0X1ULD
IP4220CZ6
IP4221CZ6-S
IP4221CZ6-XS
PRTR5V0U4D
IP3319CX6
SOT363
SOT457
SOT666
DFN1616-6
DFN1006D-2
SOT457
DFN1410-6
DFN1010-6 (XSON6)
SOT457
WLCSP6
2.0 x 1.25 x 0.95
2.9 x 1.5 x 1.0
1.6 x 1.2 x 0.55
1.6 x 1.6 x 0.5
1.0 x 0.6 x 0.37
2.9 x 1.5 x 1.0
1.45 x 1.0 x 0.48
1.0 x 1.0 x 0.48
2.9 x 1.5 x 1.0
1.35 x 0.95 x 0.57
0.55 pF
0.55 pF
0.55 pF
0.8 pF
0.95 pF
1 pF
1 pF
1 pF
1 pF
1.5 pF
12 kV
12 kV
8 kV
8 kV
8 kV
8 kV
8 kV
8 kV
8 kV
15 kV
Note
4 lines, ultra-low clamping NEW
4 lines, ultra-low clamping NEW
5 lines, uni-directional
Add Vbus protection for USB OTG & charging
1 line, unidirectional
4 lines
IP4220 with smaller package
IP4220 with smaller package
4 lines, AEC-Q101 qualified
Common Mode Filter + ESD protection (1 line pair CMF + 1 line pair ESD protection)
NEW
15
TrEOS Protection – ESD protection without compromise
A new technology delivering the ideal combination of low capacitance, high ESD
robustness and low clamping voltage. Supporting high-speed data lines including
USB3.1 at 10 Gbps. Protecting very sensitive system chips.
Safeguard your system now and in the future with TrEOS Protection devices – from
NXP, the global leader in ESD protection.
More information on the following pages and www.nxp.com/circuit-protection
4. Serial buses
4.5 High Data-rate: USB 3.1
PUSB3FR4
The USB 3.1 standard features a signaling speed of up
to 10 Gbit/s. Communication is full-duplex.
The ultra-high speed, combined with controlled impedance
routing, makes it a challenge to implement decent ESD
protection without significantly impacting overall signal
integrity.
NXP offers a variety of protection devices specifically
designed for ultra high-speed interfaces. For USB 3.1,
NXP’s latest offer is based on the PUSB3FR4. Its excellent
clamping performance, combined with ultra-low and
well-matched capacitance, makes it an ideal fit for USB 3.1
protection.
PUSB3FR4
USB 3.1 ESD protection
Selection guide
ESD robustness
(IEC61000-4-2)
Part
Package
Size (mm)
Cd
Note
PUSB3AB4
DFN2510A-10
2.5 x 1.0 x 0.5
<0.2 pF
15 kV
2 channels / 4 lines TrEOS Protection
NEW
PUSB3TB6
DFN2111-7
2.1 x 1.1 x 0.5
0.27 pF
10 kV
3 channels / 6 lines TrEOS Protection
NEW
PUSB3FR4
DFN2510A-10
2.5 x 1.0 x 0.5
0.29 pF
15 kV
2 channels / 4 lines TrEOS Protection
NEW
PUSB3FR6
DFN2111-7
2.1 x 1.1 x 0.5
0.35 pF
15 kV
3 channels / 6 lines TrEOS Protection
NEW
PUSB3F96
DFN2510A-10
2.5 x 1.0 x 0.5
0.5 pF
10 kV
PESD5V0R1BSF
DSN0603-2
0.6 x 0.3 x 0.3
0.1 pF
10 kV
Single line bidirectional TrEOS Protection
2 channels / 4 lines
NEW
PESD5V0H1BSF
DSN0603-2
0.6 x 0.3 x 0.3
0.15 pF
15 kV
Single line bidirectional TrEOS Protection
NEW
NEW
PESD5V0C1BSF
DSN0603-2
0.6 x 0.3 x 0.3
0.2 pF
20 kV
Single line bidirectional TrEOS Protection
PESD5V0C1USF
DSN0603-2
0.6 x 0.3 x 0.3
0.45 pF
20 kV
Single line unidirectional TrEOS Protection
PCMF1USB3
WLCSP5
0.8 x 1.2 x 0.5
0.3 pF
15 kV
Single channel CMF + ESD TrEOS Protection
PCMF2USB3
WLCSP10
1.6 x 1.2 x 0.5
0.3 pF
15 kV
Dual channel CMF + ESD TrEOS Protection
PCMF3USB3
WLCSP15
2.4 x 1.2 x 0.5
0.3 pF
15 kV
Triple channel CMF + ESD TrEOS Protection
NEW
NEW
NEW
NEW
17
4. Serial buses
4.6 High Data-rate: eSATA
The eSATA standard is a variant of SATA, meant for external
connectivity. Having the ability to connect to the outside
world means ESD protection is strongly recommended for
eSATA.
With its ultra-low capacitance, pass through routing
package, and excellent clamping performance, the
PUSB3FR4 is ideally suited for eSATA protection.
PUSB3FR4
eSATA ESD protection using PUSB3FR4
Selection guide
Part
Package
Size (mm)
Cd
ESD robustness
(IEC61000-4-2)
Note
PUSB3AB4
DFN2510A-10
2.5 x 1.0 x 0.5
<0.2 pF
15 kV
2 channels/ 4 lines, 0.5 mm pitch package
TrEOS Protection NEW
PUSB3FR4
DFN2510A-10
2.5 x 1.0 x 0.5
0.29 pF
15 kV
2 channels/ 4 lines, 0.5 mm pitch package
TrEOS Protection NEW
PUSB3F96
DFN2510A-10
2.5 x 1.0 x 0.5
0.5 pF
10 kV
2 channels/ 4 lines, 0.5 mm pitch package
IP4285CZ10-TBB
DFN2110-9
2.1 x 1.0 x 0.5
0.8 pF
12 kV
2 channels/ 4 lines, 0.4 mm pitch package
18
4. Serial buses
4.7 High-speed Differential Mode
signaling (LVDS, CML, TMDS, etc.)
There are a number of ways to implement general differential mode
signaling. In general we can state that the signal levels are low, the
signaling speed tends to be high, and the layout usually needs to be
controlled.
To protect these kinds of buses, VRWM is usually 5 V (or lower), capacitance
must be low, there must be excellent impedance matching between lines,
and the package footprint must allow short and matched connections.
TP Cable
TX+
TX-
RX+
RX-
RX+
RX-
TX+
TX-
PUSB3FR4
PUSB3FR4
NXP offers a variety of possible solutions. In principle, any solution
designed for high speed bus protection could be used for general
differential bus protection, but the table lists a few recommended options.
The figure shows a basic implementation using the PUSB3FR4, a
protection device for USB 3.0. This device is specifically designed for
ultra-low capacitance, excellent line-impedance matching, and ultra-low
clamping.
General high-speed differential mode signaling line ESD protection (actual data rate influences device
choice)
Selection guide
Part
Package
Size (mm)
Cd
ESD robustness
(IEC61000-4-2)
Note
PUSB3AB4
DFN2510A-10
2.5 x 1.0 x 0.5
<0.2 pF
15 kV
2 channels/ 4 lines, 0.5 mm pitch package
TrEOS Protection NEW
PUSB3FR4
DFN2510A-10
2.5 x 1.0 x 0.5
0.29 pF
15 kV
2 channels/ 4 lines, 0.5 mm pitch package
TrEOS Protection NEW
PUSB3F96
DFN2510A-10
2.5 x 1.0 x 0.5
0.5 pF
10 kV
2 channels/ 4 lines
PESD1LVDS
DFN2510-10
2.5 x 1.0 x 0.5
0.6 pF
8 kV
0.6 pF Ch/Ch matching, AEC-Q101 qualified
IP4285CZ10-TBB
DFN2110-9
2.1 x 1.0 x 0.5
0.8 pF
12 kV
2 channels/ 4 lines
19
5. Display interfaces
5.1HDMI
Our highly integrated companion ICs for HDMI offer protection,
level shift, LDO, buffering, and more. A single device provides
essentially all the interfacing needs for HDMI. Our portfolio comprise
dedicated solutions for HDMI transmitters (IP4787CZ32) and HDMI
receivers (IP4786CZ32). The figure shows these devices with their
basic connections. With the exception of a small capacitor, no other
external device is needed.
NXP also offers solutions for specific HDMI protection subsets,
such as applications where level shifting is already implemented
elsewhere. A dedicated protection solution can be implemented
using two PHDMI2F4 and a single PUSB2X4Y.
Some systems require enhanced filtering or noise removal. For this,
NXP offers Common Mode filters with built-in ESD protection. Using
two single PCMF2DFN2 devices, the HDMI TMDS channels can be
protected against common-mode noise as well as ESD.
HDMI single-device ESD protection with level shift, showing IP4787CZ32 for receiver and IP4786CZ32
for transmitter applications.
Selection guide
Part
Package
Size (mm)
Cd
ESD robustness
(IEC61000-4-2)
Note
PHDMI2F4
DFN2510A-10
2.5 x 1.0 x 0.5
0.5 pF
10 kV
2 channel high-speed TMDS line protection, 0.5 pF
PCMF2DFN2
DFN2520-9
2.5 x 2.0 x 0.5
0.6 pF
15 kV
2 channel Common Mode Filter + ESD
NEW
NEW
IP4786CZ32
DFN5050-32
5.0 x 5.0 x 0.85
0.6 pF
8 kV
TX, single-chip HDMI companion
IP4788CZ32
DFN5050-32
5.0 x 5.0 x 0.85
0.6 pF
12 kV
TX, single chip HDMI companion, lower clamping
IP4786CZ32S
DFN4040-32 (HXQFN32)
4.0 x 4.0 x 0.5
0.6 pF
8 kV
TX, single chip HDMI companion, smaller package
IP4787CZ32
DFN5050-32
5.0 x 5.0 x 0.85
0.6 pF
8 kV
RX, single-chip HDMI companion
PUSB2X4Y
SOT363
2.0 x 1.25 x 0.95
0.8 pF
8 kV
DDC/ CEC/HPD protection, 0.8 pF
IP4285CZ10-TBB
DFN2110-9
2.1 x 1.0 x 0.5
0.8 pF
12 kV
2 channel high-speed TMDS line protection
20
5. Display interfaces
5.2 DisplayPort
With DisplayPort, the main link can have one, two, or four differential
data pairs or lanes. Each link has a raw bit rate of 1.62, 2.7, or 5.4
Gbit/s per lane, with the self-clock running at 162, 270, or 540 MHz.
Using 8b/10b coding, the effective data rate can reach a maximum of
4.32 Gbit/s per lane.
DisplayPort protection can be split between the high-speed
differential lanes and the much slower AUX channels. The figure
shows a straightforward implementation using the PUSB3F96 and
PUSB2X4Y.
The PUSB3F96, with its ultra-low capacitance, excellent Cd matching,
and pass-through routing package layout, is a good choice for
implementing ESD protection on the high-speed differential lines of
DisplayPort.
DisplayPort ESD protection with high-speed lines protected with PUSB3F96 and low-speed lines with
PUSB2X4Y
Selection guide
Part
Package
Size (mm)
Cd
ESD robustness
(IEC61000-4-2)
Note
PUSB3FR4
DFN2510A-10
2.5 x 1.0 x 0.5
0.29 pF
15 kV
IP4292CZ10
DFN2510A-10
2.5 x 1.0 x 0.5
0.45 pF
8 kV
PHDMI2F4
DFN2510A-10
2.5 x 1.0 x 0.5
0.5 pF
10 kV
PUSB3F96
DFN2510A-10
2.5 x 1.0 x 0.5
0.5 pF
10 kV
2 channels / 4 lines
PESD1LVDS
DFN2510-10
2.5 x 1.0 x 0.5
0.6 pF
8 kV
0.6 pF Ch/Ch matching, AEC-Q101 qualified
IP4285CZ10-TBB
DFN2110-9
2.1 x 1.0 x 0.5
0.8 pF
12 kV
2 channels / 4 lines
2 channels/ 4 lines TrEOS Protection
NEW
2 channels / 4 lines
2 channels / 4 lines
NEW
21
6. Ethernet
6.1 Ethernet ESD Protection
ESD protection for Ethernet can typically be done in two
ways. Protection can be placed on the MAC/PHY side of
the interface or line-to-line protection can be added to
the connector side. For optimal protection, a design may
implement both schemes, as shown in the figure.
The figure at right shows a 100 Mbit interface that uses two
pairs. A similar solution can be created for Gbit Ethernet,
using four pairs.
10/100 ESD protection, with ground-referred protection on the MAC side and Common Mode Protection on the
connector side
Selection guide
Part
Package
Size (mm)
Cd
ESD robustness
(IEC61000-4-2)
Note
IP4233CZ6
SOT363
2.0 x 1.25 x 0.95
0.9 pF
8 kV
Common Mode Protection
IP4220CZ6
SOT457
2.9 x 1.5 x 1.0
1 pF
8 kV
1 port protection
IP4221CZ6-S
DFN1410-6
1.45 x 1.0 x 0.48
IP4221CZ6-XS
DFN1010-6 (XSON6)
1.0 x 1.0 x 0.48
1 pF
8 kV
IP4220 with smaller package
PRTR5V0U4D
SOT457
2.9 x 1.5 x 1.0
1 pF
8 kV
1 port protection, AEC-Q101 qualified
PESD5V0U1BA
SOD323
1.7 x 1.25 x 0.95
2.9 pF
10 kV
Common Mode Protection
22
6. Ethernet
6.2BroadR-Reach ESD protection
BroadR-Reach is a relatively new Ethernet standard
mainly targeting automotive applications. One of the key
advantages of this standard compared to the standard
Ethernet specification is that no transformer is required.
Today, the most commonly found speed is 100 Mbit per
channel.
Typical applications are high -speed interfaces for
infotainment or ADAS systems within a car.
The figure on the right shows a typical ESD protection
structure that can be used on a 100 Mbit BroadR-Reach
interface. The shown example implements a single channel.
Multi-channel protection is possible with other devices as
listed in the table below.
BroadR-Reach Protection, Single Channel
Selection Guide
Part
Package
Size (mm)
Cd
Level
Note
2-channel protection, AEC-Q101
PESD1LVDS
DFN2510-10
1.0 x 2.5 x 0.5
0.6 pF
8 kV
PRTR5V0U4D
SOT457
2.9 x 1.5 x 1.0
1.0 pF
8 kV
2-channel protection, AEC-Q101
PRTR5V0U2AX
SOT143B
2.9 x 1.3 x 1.0
1.8 pF
12 kV
1-channel protection, AEC-Q101
23
7. RF
7.1 GPS / GNSS
GPS applications are commonplace today. ESD can enter
the system via the antenna. Protection of the sensitive
receiver circuitry is often required.
Requirements for this type of protection are extremely
low capacitance and high linearity. Low clamping and high
maximum peak surge capability remain a key need as well.
The figure on the right shows a typical protection scheme
using the new, ultra-low-capacitance, bidirectional
PESD5V0R1BSF. This device comes in an ultra-small
DSN0603 package that further minimizes any resistive and
inductive impedance.
GPS ESD protection using PESD5V0R1BSF
Selection Guide
Part
Package
Size (mm)
Cd
ESD robustness
(IEC61000-4-2)
Note
PESD5V0R1BSF
DSN0603-2
0.6 x 0.3 x 0.3
0.1 pF
10 kV
Single-line bidirectional TrEOS Protection
NEW
PESD5V0H1BSF
DSN0603-2
0.6 x 0.3 x 0.3
0.15 pF
15 kV
Single-line bidirectional TrEOS Protection
NEW
PESD5V0C1BSF
DSN0603-2
0.6 x 0.3 x 0.3
0.2 pF
20 kV
Single-line bidirectional TrEOS Protection
NEW
24
7. RF
7.2 WLAN
WLAN is today’s de facto standard for wireless connectivity
in a multitude of applications. Dual-band is the most
commonly found implementation. The figure on the right
shows a sample implementation with an ESD protection
device (PESD5V0R1BSF) to protect the sensitive RF circuitry
against ESD strikes entering via the antenna.
To maintain optimal RF performance, extremely low
capacitance and linearity for the ESD protection device are
an absolute must. The table below shows a number of the
latest ultra-low-capacitance and clamping devices.
Dual-band WLAN ESD protection using PESD5V0R1BSF
Selection Guide
Part
Package
Size (mm)
Cd
ESD robustness
(IEC61000-4-2)
Note
PESD5V0R1BSF
DSN0603-2
0.6 x 0.3 x 0.3
0.1 pF
10 kV
Single-line bidirectional TrEOS Protection
NEW
PESD5V0H1BSF
DSN0603-2
0.6 x 0.3 x 0.3
0.15 pF
15 kV
Single-line bidirectional TrEOS Protection
NEW
PESD5V0C1BSF
DSN0603-2
0.6 x 0.3 x 0.3
0.2 pF
20 kV
Single-line bidirectional TrEOS Protection
NEW
25
8. Support tools
To help you achieve the best, most efficient design with our products, we offer a wide variety of support tools, available on the
NXP Semiconductors website www.nxp.com/circuit-protection.
Documents & technical support
Find and download application notes, datasheets or literature with product details, find links to additional technical details and contact
information for further questions. NXP’s technical support portal: http://www.nxp.com/technical-support-portal
Offline X-reference tool & selector guide
Find NXP alternates to industry part numbers and download the X-Reference offline tool or install the latest version of the offline product
selector: http://www.nxp.com/products/x-reference-offline-tool
Download NXP App
This free NXP application allows engineers to search, buy and share more than 10,000 products parts from NXP‘s product portfolio on
your iPhone, iPad and iPod Touch or Android: http://www.nxp.com/news/mobile-app.html
Models and test data
A selection of our spice models can be found at: http://www.nxp.com/models
Samples
Order samples directly from our online system: http://www.nxp.com/help/samples
Sales offices and distributors
Dedicated and skilled sales and distribution teams provide support on a regional level: http://www.nxp.com/profile/sales
Selection Guide – digital version
The pdf file of this selection guide can be downloaded here: http://www.nxp.com/discrete_selection_guide
26
Notes
www.nxp.com
© 2015 NXP Semiconductors N.V.
All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document
Date of release: July 2015
does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the
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