ON ESD8704 Esd protection diode Datasheet

ESD8704
ESD Protection Diode
Low Capacitance Array for High Speed
Data Lines
The ESD8704 is designed to protect high speed data lines from
ESD. Ultra−low capacitance and low ESD clamping voltage make this
device an ideal solution for protecting voltage sensitive high speed
data lines. The flow−through style package allows for easy PCB layout
and matched trace lengths necessary to maintain consistent impedance
between high speed differential lines such as USB 3.0/3.1.
www.onsemi.com
MARKING
DIAGRAM
UDFN10
CASE 517BB
Features
• Low Capacitance (0.5 pF Max, I/O to GND)
• Protection for the Following IEC Standards:
IEC 61000−4−2 (Level 4)
• Low ESD Clamping Voltage
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
7DMG
G
7D = Specific Device Code
M = Date Code
G
= Pb−Free Package
(Note: Microdot may be in either location)
Compliant
PIN CONFIGURATION
AND SCHEMATIC
Typical Applications
• USB 3.0/3.1
• eSATA
• DisplayPort
N/C N/C
10
MAXIMUM RATINGS (TJ = 25°C unless otherwise noted)
Rating
Symbol
Value
Unit
Operating Junction Temperature Range
TJ
−55 to +125
°C
Storage Temperature Range
Tstg
−55 to +150
°C
Lead Solder Temperature −
Maximum (10 Seconds)
TL
260
°C
ESD
ESD
±30
±30
kV
kV
IEC 61000−4−2 Contact (ESD)
IEC 61000−4−2 Air (ESD)
Stresses exceeding those listed in the Maximum Ratings table may damage the
device. If any of these limits are exceeded, device functionality should not be
assumed, damage may occur and reliability may be affected.
GND N/C N/C
9
8
7
6
1
2
3
4
5
I/O
I/O
GND
I/O
I/O
I/O
Pin 1
I/O
Pin 2
I/O
Pin 4
I/O
Pin 5
Pins 3, 8
Note: Common GND − Only Minimum of 1 GND connection required
=
ORDERING INFORMATION
October, 2015 − Rev. 0
Package
Shipping
ESD8704MUTAG
UDFN10
(Pb−Free)
3000 / Tape &
Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
See Application Note AND8308/D for further description of
survivability specs.
© Semiconductor Components Industries, LLC, 2015
Device
1
Publication Order Number:
ESD8704/D
ESD8704
ELECTRICAL CHARACTERISTICS
I
(TA = 25°C unless otherwise noted)
Symbol
VRWM
IR
VBR
IPP
Parameter
Working Peak Voltage
RDYN
Maximum Reverse Leakage Current @ VRWM
VBR
Breakdown Voltage @ IT
V
VC VRWMVHOLD
Test Current
IR
IT
VHOLD
Holding Reverse Voltage
IHOLD
IHOLD
Holding Reverse Current
RDYN
Dynamic Resistance
IT
VC
RDYN
IPP
Maximum Peak Pulse Current
VC
Clamping Voltage @ IPP
VC = VHOLD + (IPP * RDYN)
−IPP
VC = VHOLD + (IPP * RDYN)
ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise specified)
Parameter
Symbol
Reverse Working Voltage
VRWM
Breakdown Voltage
VBR
Conditions
Min
Typ
I/O Pin to GND
IT = 1 mA, I/O Pin to GND
5.0
VRWM = 3.3 V, I/O Pin to GND
Max
Unit
3.3
V
6.0
V
1.0
mA
Reverse Leakage Current
IR
Holding Reverse Voltage
VHOLD
I/O Pin to GND
1.9
V
Holding Reverse Current
IHOLD
I/O Pin to GND
20
mA
Clamping Voltage
VC
IEC61000−4−2, ±8 KV Contact
Clamping Voltage TLP
VC
IPP = 8 A
IPP = −8 A
4.7
−4.0
IPP = 16 A
IPP = −16 A
6.6
−6.7
I/O Pin to GND
GND to I/O Pin
0.30
0.38
VR = 0 V, f = 1 MHz between I/O Pins and GND
VR = 0 V, f = 2.5 GHz between I/O Pins and GND
VR = 0 V, f = 5.0 GHz between I/O Pins and GND
VR = 0 V, f = 1 MHz, between I/O Pins
0.30
0.30
0.31
0.15
Dynamic Resistance
RDYN
Junction Capacitance
CJ
V
V
W
0.50
0.40
0.40
0.25
pF
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
10
80
0
70
−10
60
−20
VOLTAGE (V)
VOLTAGE (V)
90
50
40
30
20
−40
−50
−60
−70
10
−80
0
−10
−20
−30
−90
0
20
40
60
80
100
120
−100
−20
140
TIME (ns)
0
20
40
60
80
100
120
TIME (ns)
Figure 1. IEC61000−4−2 +8 kV Contact ESD
Clamping Voltage
Figure 2. IEC61000−4−2 −8 kV Contact
Clamping Voltage
www.onsemi.com
2
140
ESD8704
IEC61000−4−2 Waveform
IEC 61000−4−2 Spec.
Ipeak
Level
Test Voltage (kV)
First Peak
Current
(A)
Current at
30 ns (A)
Current at
60 ns (A)
1
2
7.5
4
2
2
4
15
8
4
3
6
22.5
12
6
4
8
30
16
8
100%
90%
I @ 30 ns
I @ 60 ns
10%
tP = 0.7 ns to 1 ns
Figure 3. IEC61000−4−2 Spec
ESD Gun
Oscilloscope
TVS
50 W
Cable
50 W
Figure 4. Diagram of ESD Clamping Voltage Test Setup
The following is taken from Application Note
AND8307/D − Characterization of ESD Clamping
Performance.
systems such as cell phones or laptop computers it is not
clearly defined in the spec how to specify a clamping voltage
at the device level. ON Semiconductor has developed a way
to examine the entire voltage waveform across the ESD
protection diode over the time domain of an ESD pulse in the
form of an oscilloscope screenshot, which can be found on
the datasheets for all ESD protection diodes. For more
information on how ON Semiconductor creates these
screenshots and how to interpret them please refer to
AND8307/D.
ESD Voltage Clamping
For sensitive circuit elements it is important to limit the
voltage that an IC will be exposed to during an ESD event
to as low a voltage as possible. The ESD clamping voltage
is the voltage drop across the ESD protection diode during
an ESD event per the IEC61000−4−2 waveform. Since the
IEC61000−4−2 was written as a pass/fail spec for larger
www.onsemi.com
3
20
−20
16
−16
TLP CURRENT (A)
TLP CURRENT (A)
ESD8704
12
8
−12
−8
−4
4
0
0
0
NOTE:
1
2
3
4
5
6
7
8
0 −1 −2 −3 −4 −5 −6 −7 −8 −9 −10 −11 −12 −13 −14
9 10 11 12 13 14
VC, VOLTAGE (V)
VC, VOLTAGE (V)
Figure 5. Positive TLP I−V Curve
Figure 6. Negative TLP I−V Curve
TLP parameter: Z0 = 50 W, tp = 100 ns, tr = 300 ps, averaging window: t1 = 30 ns to t2 = 60 ns. VIEC is the equivalent voltage
stress level calculated at the secondary peak of the IEC 61000−4−2 waveform at t = 30 ns with 2 A/kV. See TLP description
below for more information.
Transmission Line Pulse (TLP) Measurement
L
Transmission Line Pulse (TLP) provides current versus
voltage (I−V) curves in which each data point is obtained
from a 100 ns long rectangular pulse from a charged
transmission line. A simplified schematic of a typical TLP
system is shown in Figure 7. TLP I−V curves of ESD
protection devices accurately demonstrate the product’s
ESD capability because the 10s of amps current levels and
under 100 ns time scale match those of an ESD event. This
is illustrated in Figure 8 where an 8 kV IEC 61000−4−2
current waveform is compared with TLP current pulses at
8 A and 16 A. A TLP I−V curve shows the voltage at which
the device turns on as well as how well the device clamps
voltage over a range of current levels. For more information
on TLP measurements and how to interpret them please
refer to AND9007/D.
S Attenuator
÷
50 W Coax
Cable
10 MW
IM
50 W Coax
Cable
VM
DUT
VC
Oscilloscope
Figure 7. Simplified Schematic of a Typical TLP
System
Figure 8. Comparison Between 8 kV IEC 61000−4−2 and 8 A and 16 A TLP Waveforms
www.onsemi.com
4
1.0
1.0
0.9
0.9
0.8
0.8
CJ, CAPACITANCE (pF)
CJ, CAPACITANCE (pF)
ESD8704
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
0.5
1
1.5
2
2.5
VR, REVERSE VOLTAGE (V)
3
0.0
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10
FREQUENCY (GHz)
3.5
Figure 9. Junction Capacitance vs. Reverse
Voltage
Figure 10. Junction Capacitance vs.
Frequency
5 Gbps Eye Diagram Without ESD8704
5 Gbps Eye Diagram With ESD8704
Figure 11. USB3.0 Eye Diagram with and without ESD8704. 5 Gb/s
10 Gbps Eye Diagram Without ESD8704
10 Gbps Eye Diagram With ESD8704
Figure 12. USB3.1 Eye Diagram with and without ESD8704. 10 Gb/s
See application note AND9075/D for further description of eye diagram testing methodology.
www.onsemi.com
5
ESD8704
Figure 13. ESD8704 Insertion Loss
Interface
Data Rate
(Gb/s)
Fundamental Frequency
(GHz)
3rd Harmonic Frequency
(GHz)
USB 3.0
5
2.5 (m1)
7.5 (m3)
USB 3.1
10
5.0 (m2)
15 (m4)
www.onsemi.com
6
ESD8704 Insertion Loss (dB)
m1 = −0.09
m3 = −0.89
m2 = −0.36
m4 = −9.68
ESD8704
USB 3.0/3.1 Type A
Connector
StdA_SSTX+
Vbus
StdA_SSTX−
ESD8704
D−
ESD7L5.0
GND_DRAIN
D+
StdA_SSRX+
GND
StdA_SSRX−
Figure 14. USB 3.0/3.1 Standard Layout Diagram
PCB Layout Guidelines
Steps must be taken for proper placement and signal trace
routing of the ESD protection device in order to ensure the
maximum ESD survivability and signal integrity for the
application. Such steps are listed below.
• Place the ESD protection device as close as possible to
the I/O connector to reduce the ESD path to ground and
improve the protection performance.
♦ In USB 3.0 applications, the ESD protection device
should be placed between the AC coupling
capacitors and the I/O connector on the TX
differential lanes as shown in Figure 15. In this
configuration, no DC current can flow through the
ESD protection device preventing any potential
•
latch-up condition. For more information on latchup
considerations, see below description on Page 8.
Make sure to use differential design methodology and
impedance matching of all high speed signal traces.
♦ Use curved traces when possible to avoid unwanted
reflections.
♦ Keep the trace lengths equal between the positive
and negative lines of the differential data lanes to
avoid common mode noise generation and
impedance mismatch.
♦ Place grounds between high speed pairs and keep as
much distance between pairs as possible to reduce
crosstalk.
Figure 15. USB 3.0/3.1 Connection Diagram
www.onsemi.com
7
ESD8704
Latch-Up Considerations
therefore latch-up free. Please note that for USB 3.0
applications, ESD8704 latch-up free considerations are
explained in more detail in the above PCB layout guidelines.
In the non-latch up free load line case, the IV characteristic
of the snapback protection device intersects the load-line in
two points (VOPA, IOPA) and (VOPB, IOPB). Therefore in this
case, the potential for latch-up exists if the system settles at
(VOPB, IOPB) after a transient. Because of this, ESD8704
should not be used for HDMI applications – ESD8104 or
ESD8040 have been designed to be acceptable for HDMI
applications without latch-up. Please refer to Application
Note AND9116/D for a more in-depth explanation of
latch-up considerations using ESD8000 series devices.
ON Semiconductor’s 8000 series of ESD protection
devices utilize a snap-back, SCR type structure. By using
this technology, the potential for a latch-up condition was
taken into account by performing load line analyses of
common high speed serial interfaces. Example load lines for
latch-up free applications and applications with the potential
for latch-up are shown below with a generic IV
characteristic of a snapback, SCR type structured device
overlaid on each. In the latch-up free load line case, the IV
characteristic of the snapback protection device intersects
the load-line in one unique point (VOP, IOP). This is the only
stable operating point of the circuit and the system is
I
I
ISSMAX
IOPB
ISSMAX
IOP
VOP
IOPA
V
VDD
VOPB
ESD8704 Latch−up free:
USB 2.0 LS/FS, USB 2.0 HS, USB 3.0/3.1 SS,
DisplayPort
VOPA VDD
V
ESD8704 Potential Latch−up:
HDMI 1.4/1.3a TMDS
Figure 16. Example Load Lines for Latch-up Free Applications and Applications with the Potential for Latch-up
Table 1. SUMMARY OF SCR REQUIREMENTS FOR LATCH-UP FREE APPLICATIONS
Application
VBR (min)
(V)
IH (min)
(mA)
VH (min)
(V)
ON Semiconductor ESD8000 Series
Recommended PN
HDMI 1.4/1.3a TMDS
3.465
54.78
1.0
ESD8104, ESD8040
USB 2.0 LS/FS
3.301
1.76
1.0
ESD8704
USB 2.0 HS
0.482
N/A
1.0
ESD8704
USB 3.0/3.1 SS
2.800
N/A
1.0
ESD8704, ESD8006
DisplayPort
3.600
25.00
1.0
ESD8704, ESD8006
www.onsemi.com
8
ESD8704
PACKAGE DIMENSIONS
UDFN10 2.5x1, 0.5P
CASE 517BB
ISSUE O
L
D
0.10 C
2X
2X
A B
ÍÍÍ
ÍÍÍ
PIN ONE
REFERENCE
0.10 C
L1
DETAIL A
OPTIONAL
CONSTRUCTIONS
E
TOP VIEW
A3
A
0.10 C
A1
0.08 C
A1
C
SIDE VIEW
2X
DETAIL A
10
A3
DETAIL B
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ASME Y14.5M, 1994.
2. CONTROLLING DIMENSION: MILLIMETERS.
3. DIMENSION b APPLIES TO PLATED
TERMINAL AND IS MEASURED BETWEEN
0.15 AND 0.30mm FROM TERMINAL.
DIM
A
A1
A3
b
b2
D
E
e
L
L1
MILLIMETERS
MIN
MAX
0.55
0.45
0.00
0.05
0.13 REF
0.15
0.25
0.45
0.35
2.50 BSC
1.00 BSC
0.50 BSC
0.30
0.40
--0.05
OPTIONAL
CONSTRUCTION
SEATING
PLANE
RECOMMENDED
SOLDERING FOOTPRINT*
b2
1
ÇÇÇ
ÇÇÇ
ÉÉÉ
ÉÉÉ
MOLD CMPD
EXPOSED Cu
DETAIL B
10X
L
10X
L
10X
5
2X
0.50
6
0.45
1.30
e
8X
b
0.10 C A
BOTTOM VIEW
0.05 C
PACKAGE
OUTLINE
B
NOTE 3
0.50
PITCH
8X
0.25
DIMENSIONS: MILLIMETERS
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
ON Semiconductor and the
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC) or its subsidiaries in the United States and/or other countries.
SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed
at www.onsemi.com/site/pdf/Patent−Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation
or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets
and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each
customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended,
or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which
the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or
unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and
expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim
alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable
copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT:
Literature Distribution Center for ON Semiconductor
P.O. Box 5163, Denver, Colorado 80217 USA
Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada
Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada
Email: [email protected]
N. American Technical Support: 800−282−9855 Toll Free
USA/Canada
Europe, Middle East and Africa Technical Support:
Phone: 421 33 790 2910
Japan Customer Focus Center
Phone: 81−3−5817−1050
www.onsemi.com
9
ON Semiconductor Website: www.onsemi.com
Order Literature: http://www.onsemi.com/orderlit
For additional information, please contact your local
Sales Representative
ESD8704/D