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NUP4201DR2 Advance Information Low Capacitance Surface Mount TVS for High-Speed Data Interfaces
The NUP4201DR2 transient voltage suppressor is designed to protect equipment attached to high speed communication lines from ESD, EFT, and lighting.
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* SO-8 Package * Peak Power - 500 Watts 8 x 20 mS * ESD Rating:
IEC 61000-4-2 (ESD) 15 kV (air) 8 kV (contact) IEC 61000-4-4 (EFT) 40 A (5/50 ns) IEC 61000-4-5 (lighting) 23 (8/20 ms) UL Flammability Rating of 94V-0 High Speed Communication Line Protection USB Power and Data Line Protection Video Line Protection Base Stations HDSL, IDSL Secondary IC Side Protection Microcontroller Input Protection
SO-8 LOW CAPACITANCE VOLTAGE SUPPRESSOR 500 WATTS PEAK POWER 6 VOLTS
PIN CONFIGURATION AND SCHEMATIC
I/O 1 1 REF 1 2 REF 1 3 I/O 2 4 8 REF 2 7 I/O 4 6 I/O 3 5 REF 2
* * * * * * *
Typical Applications:
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MAXIMUM RATINGS
Rating Peak Power Dissipation 8 x 20 mS @ TA = 25C (Note 1) Junction and Storage Temperature Range Lead Solder Temperature - Maximum 10 Seconds Duration Symbol Ppk TJ, Tstg TL Value 500 -55 to +150 260 Unit W C C 1 SO-8 CASE 751 PLASTIC
MARKING DIAGRAM
1. Non-repetitive current pulse 8 x 20 mS exponential decay waveform
P4201 LYW
P4201 L Y W
= Device Code = Location Code = Year = Work Week
ORDERING INFORMATION
Device
This document contains information on a new product. Specifications and information herein are subject to change without notice.
Package SO-8
Shipping 2500/Tape & Reel
NUP4201DR2
(c) Semiconductor Components Industries, LLC, 2002
1
April, 2002 - Rev. 0
Publication Order Number: NUP4201DR2/D
NUP4201DR2
ELECTRICAL CHARACTERISTICS
Characteristic Reverse Breakdown Voltage @ It = 1.0 mA Reverse Leakage Current @ VRWM = 5.0 Volts Maximum Clamping Voltage @ IPP = 1.0 A, 8 x 20 mS Maximum Clamping Voltage @ IPP = 10 A, 8 x 20 mS Between I/O Pins and Ground @ DC Bias = 0 V, 1.0 MHz Between I/O Pins and I/O @ DC Bias = 0 V, 1.0 MHz Symbol VBR IR VC VC Capacitance Capacitance Min 6.0 N/A N/A N/A - - Typ - - - - 5.0 2.5 Max - 10 9.8 12 10 5.0 Unit V mA V V pF pF
ELECTRICAL CHARACTERISTICS
(TA = 25C unless otherwise noted) UNIDIRECTIONAL (Circuit tied to Pins 1 and 3 or 2 and 3) Symbol IPP VC VRWM IR VBR IT QVBR IF VF ZZT IZK ZZK Parameter Maximum Reverse Peak Pulse Current Clamping Voltage @ IPP Working Peak Reverse Voltage Maximum Reverse Leakage Current @ VRWM Breakdown Voltage @ IT Test Current Maximum Temperature Coefficient of VBR Forward Current Forward Voltage @ IF Maximum Zener Impedance @ IZT Reverse Current Maximum Zener Impedance @ IZK VC VBR VRWM IF
I
IR VF IT
V
IPP
Uni-Directional TVS
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NUP4201DR2
TYPICAL CHARACTERISTICS
9 VZ, REVERSE BREAKDOWN (V) IR, REVERSE LEAKAGE (mA) -50 0 50 100 T, TEMPERATURE (C) 150 200 8 7 6 5 4 3 2 1 0 -100 8 7 6 5 4 3 2 1 0 -100 -50 0 50 100 150 200
T, TEMPERATURE (C)
Figure 1. Reverse Breakdown versus Temperature
100 % OF PEAK PULSE CURRENT 90 80 70 60 50 40 30 20 10 0 0 20 40 t, TIME (ms) 60 80 tP PEAK VALUE IRSM @ 8 ms VC, CLAMPING VOLTAGE (V) PULSE WIDTH (tP) IS DEFINED AS THAT POINT WHERE THE PEAK CURRENT DECAY = 8 ms HALF VALUE IRSM/2 @ 20 ms 35 30 25 20 15 10 5 0 0
Figure 2. Reverse Leakage versus Temperature
tr
10
20
30
40
50
60
70
80
90
IPP, PEAK PULSE CURRENT (A)
Figure 3. 8 x 20 ms Pulse Waveform
Figure 4. Clamping Voltage versus Peak Pulse Current
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NUP4201DR2
Applications information The new NUP4201DR2 device is a low capacitance TVS Diode array designed to protect sensitive electronics such as communications systems, computers, and computer peripherals against damage due to ESD conditions or transient voltage conditions. Because of its low capacitance array configuration, it can be used in high speed I/O data lines. The integrated design of the NUP4201DR2 device offers surge rated, low capacitance steering diodes and a TVS diode integrated in a single package (SO-8). If a transient condition occurs, the steering diodes will drive the transient condition to the positive polarity of the power supply or to ground. The TVS device protects the power line against over-voltage conditions to avoid damage in any downstream components. NUP4201DR2 Device's Configurations Options The NUP4201DR2 is able to protect up to four data lines against transient over-voltage conditions by driving them to a fixed reference point for clamping purposes. The steering diodes will be forward biased whenever the voltage on the protected line exceeds the reference voltage (Vcc+Vf). The diodes will drive the transient current away from the sensitive circuit. Data lines are connected at pins 1,4,6 and 7. The negative reference is connected at pins 5 and 8. These pins must be connected directly to ground by using a ground plane to minimize the PCB's ground inductance. It is very important to reduce as much as possible the PCB trace lengths to minimize parasitic inductances. Option 1 Four Data lines protection and power supply protection using Vcc as reference.
I/O 1 I/O 2 1 2 VCC 3 4 I/O 3 I/O 4 8 7 6 5 I/O 3 I/O 4
Option 2 Four Data lines protection with Bias and power supply isolation resistor.
I/O 1 I/O 2 VCC 1 10 K 2 3 4 I/O 3 I/O 4 8 7 6 5
The NUP4201DR2 device can be isolated from the power supply by connecting a series resistor between pins 2 & 3 and Vcc. A resistor of 10Kohms is recommended for isolation purposes. The internal TVS and steering diodes remain biased, which provides the advantage of lower capacitance. Option 3 Four Data lines protection using internal TVS diode as reference.
I/O 1 I/O 2 1 NC NC 2 3 4 8 7 6 5
In the case of applications in which a positive supply reference is not available or full isolation is required, the internal TVS could be used as the reference, so for this purpose, the pins 2 and 3 are not connected. In this case, the steering diodes will conduct whenever the voltage on the protected line exceeds the working voltage of the TVS plus one diode drop (Vc=Vf + VTVS).
For this configuration, connect pins 2 & 3 directly to the positive supply rail (Vcc), the data lines are referenced to the supply voltage. The internal TVS diode prevents over-voltage on the supply rail.
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NUP4201DR2
"Rail to Rail" Protection Topology The following figure shows a case when discrete diodes are configured for rail to rail protection on an I/O line:
VCC ESD Positive
11
D1
VF + VCC
-VF ESD Negative 12 D2
a good board layout to minimize the effects of the parasitic inductances. Nevertheless, some disadvantages are still present when discrete diodes are used to suppress ESD conditions in "rail to rail" configuration. If the ESD current is too high, it can potentially result in the damage of any components connected to that rail and it is also possible to experience damage in the discrete diodes if their power dissipation capability is exceeded. The NUP4201DR2 On Semiconductor's device provides a concept named "RailClamp" which is designed to eliminate the disadvantages of the usage of discrete diodes for ESD protection. The RailClamp concept is achieved with the integration of the TVS device in together with the steering diodes.
Upon the above figure, it is possible to observe that if a positive ESD condition occurs, the D1 diode will be forward biased while the D2 diode will be biased when a negative ESD condition occurs. A valid first approximation of the resulting clamping voltage due to the protection diodes can be made as follows: For positive pulse conditions: Vc = Vcc + Vf For negative pulse conditions: Vc = -Vf It is important to mention that effects of parasitic inductances must be considered for fast rise time transient conditions because the clamping voltage on the protected circuit will be different than in the previous case. A valid approximation of the resulting clamping voltage can be made as show below: For positive pulse conditions: Vc = Vcc + Vf + (L diESD/dt) For negative pulse conditions: Vc = -Vf - (L diESD/dt) As shown in the formulas, the clamping voltage (Vc) not only depends on the Vf of the steering diodes but also in the L diESD/dt factor, so this is why it is very important to have
D1
D3
D5
D7
D2
D4
D6
D8
0 Rail to Rail Protection with integrated TBS to achieve the RailClamp concept
During an ESD condition, the ESD current will be driven to ground through the TVS device, so the resulting clamping voltage on the protected IC will be: Vc = VF(RailClamp) + VTVS. The clamping voltage of the TVS device is shown as part of the specifications of the NUP4201DR2 datasheet. The clamping voltage will depend on the magnitude of the ESD current. The steering diodes are fast switching devices with unique forward voltage and low capacitance characteristics.
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NUP4201DR2
Typical Applications
UPSTREAM USB PORT VBUS VBUS D+ D- GND VBUS USB Controller RT RT VBUS
NUP4201DR2
VBUS VBUS D+ D- GND
DOWNSTREAM USB PORT
CT CT
VBUS
NUP2201DT1
VBUS RT D+ RT CT CT D- GND DOWNSTREAM USB PORT
ESD Protection for USB Port
R1 RTIP R2 RRING VCC R3 T1
T1/E1 TRANCEIVER NUP4201DR2
R4 TTIP R5 TRING T2
TI/E1 Interface Protection
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NUP4201DR2
Transient Voltage Suppressor - Surface Mount
500 Watts Peak Power
SO-8 CASE 751-07 ISSUE W
-X- A
8 5 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. DIM A B C D G H J K M N S MILLIMETERS MIN MAX 4.80 5.00 3.80 4.00 1.35 1.75 0.33 0.51 1.27 BSC 0.10 0.25 0.19 0.25 0.40 1.27 0_ 8_ 0.25 0.50 5.80 6.20 INCHES MIN MAX 0.189 0.197 0.150 0.157 0.053 0.069 0.013 0.020 0.050 BSC 0.004 0.010 0.007 0.010 0.016 0.050 0_ 8_ 0.010 0.020 0.228 0.244
B
1 4
S
0.25 (0.010)
M
Y
M
-Y- G C -Z- H D 0.25 (0.010)
M SEATING PLANE
K
N
X 45 _
0.10 (0.004)
M
J
ZY
S
X
S
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NUP4201DR2
ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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.
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: ONlit@hibbertco.com N. American Technical Support: 800-282-9855 Toll Free USA/Canada JAPAN: ON Semiconductor, Japan Customer Focus Center 4-32-1 Nishi-Gotanda, Shinagawa-ku, Tokyo, Japan 141-0031 Phone: 81-3-5740-2700 Email: r14525@onsemi.com ON Semiconductor Website: http://onsemi.com For additional information, please contact your local Sales Representative.
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NUP4201DR2/D

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