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SRV05-4MR6 Transient Voltage Suppressors
ESD Protection Diodes with Low Clamping Voltage
The SRV05-4MR6 transient voltage suppressor is designed to protect high speed data lines from ESD, EFT, and lighting.
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Protects 4 I/O Lines Low Working Voltage: 5 V Low Clamping Voltage Low Capacitance (<5 pF) for High Speed Interfaces Transient Protection for High Speed Lines to: IEC61000-4-2 (ESD) 15 kV (air), 8 kV (contact) IEC61000-4-4 (EFT) 40 A IEC61000-4-5 (Lightning) 12 A TSOP-6 is Footprint Compatible with SOT-23 6 Lead, SC-59 6 Lead and SC-74 UL Flammability Rating of 94 V-0 This is a Pb-Free Device High Speed Communication Line Protection USB 1.1 and 2.0 Power and Data Line Protection Digital Video Interface (DVI) Monitors and Flat Panel Displays
LOW CAPACITANCE TVS ARRAY 300 WATTS PEAK POWER 6 VOLTS
PIN CONFIGURATION AND SCHEMATIC
I/O 1 VN 2 I/O 3 6 I/O 5 VP 4 I/O
Typical Applications
6 1 TSOP-6 CASE 318G PLASTIC
MAXIMUM RATINGS (TJ = 25C unless otherwise noted)
Rating Peak Power Dissipation 8 x 20 ms @ TA = 25C (Note 1) Operating Junction Temperature Range Storage Temperature Range Lead Solder Temperature - Maximum (10 Seconds) Human Body Model (HBM) Machine Model (MM) IEC 61000-4-2 Air (ESD) IEC 61000-4-2 Contact (ESD) IEC 61000-4-4 (5/50 ns) IEC 61000-4-5 (8 x 20 ms) Symbol Ppk TJ Tstg TL ESD Value 300 -55 to +125 -55 to +150 260 16000 400 15000 8000 40 12 Unit W
MARKING DIAGRAM
63 C C C V
G
G
63 = Specific Device Code M = Date Code G = Pb-Free Package (Note: Microdot may be in either location) *Date Code orientation may vary depending upon manufacturing location.
M
EFT -
A A
ORDERING INFORMATION
Device SRV05-4MR6T1G Package Shipping
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. 1. Non-repetitive current pulse per Figure 5 (Pin 5 to Pin 2)
TSOP-6 3000/Tape & Reel (Pb-Free)
See Application Note AND8308/D for further description of survivability specs.
(c) Semiconductor Components Industries, LLC, 2009
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. Publication Order Number: SRV05-4MR6/D
November, 2009 - Rev. 0
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SRV05-4MR6
ELECTRICAL CHARACTERISTICS
(TA = 25C unless otherwise noted) Symbol IPP VC VRWM IR VBR IT IF VF Ppk C Parameter Maximum Reverse Peak Pulse Current Clamping Voltage @ IPP Working Peak Reverse Voltage Maximum Reverse Leakage Current @ VRWM Breakdown Voltage @ IT Test Current Forward Current Forward Voltage @ IF Peak Power Dissipation Capacitance @ VR = 0 and f = 1.0 MHz IPP VC VBR VRWM IR VF IT V IF I
Uni-Directional TVS
*See Application Note AND8308/D for detailed explanations of datasheet parameters.
ELECTRICAL CHARACTERISTICS (TJ=25C unless otherwise specified)
Parameter Reverse Working Voltage Breakdown Voltage Reverse Leakage Current Clamping Voltage Clamping Voltage Junction Capacitance Junction Capacitance Clamping Voltage Symbol VRWM VBR IR VC VC CJ CJ VC (Note 2) IT=1 mA, (Note 3) VRWM = 5 V IPP = 1 A (Note 4) IPP = 5 A (Note 4) VR = 0 V, f=1 MHz between I/O Pins and GND VR = 0 V, f=1 MHz between I/O Pins Per IEC 61000-4-2 (Note 5) 3.0 1.5 Figure 1 and 2 6.0 5.0 12.5 17.5 5.0 3.0 Conditions Min Typ Max 5.0 Unit V V mA V V pF pF V
2. TVS devices are normally selected according to the working peak reverse voltage (VRWM), which should be equal or greater than the DC or continuous peak operating voltage level. 3. VBR is measured at pulse test current IT. 4. Non-repetitive current pulse per Figure 5 (Any I/O Pin to Ground) 5. For test procedure see Figures 3 and 4 and Application Note AND8307/D.
Figure 1. ESD Clamping Voltage Screenshot Positive 8 kV Contact per IEC61000-4-2
Figure 2. ESD Clamping Voltage Screenshot Negative 8 kV Contact per IEC61000-4-2
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SRV05-4MR6
IEC 61000-4-2 Spec.
Test Voltage (kV) 2 4 6 8 First Peak Current (A) 7.5 15 22.5 30 Current at 30 ns (A) 4 8 12 16 Current at 60 ns (A) 2 4 6 8 I @ 60 ns 10% tP = 0.7 ns to 1 ns I @ 30 ns IEC61000-4-2 Waveform Ipeak 100% 90%
Level 1 2 3 4
Figure 3. IEC61000-4-2 Spec
ESD Gun
TVS
Oscilloscope
50 W Cable
50 W
Figure 4. Diagram of ESD Test Setup The following is taken from Application Note AND8308/D - Interpretation of Datasheet Parameters for ESD Devices. 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
100 % OF PEAK PULSE CURRENT 90 80 70 60 50 40 30 20 10 0 0 20 tP tr
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.
PEAK VALUE IRSM @ 8 ms PULSE WIDTH (tP) IS DEFINED AS THAT POINT WHERE THE PEAK CURRENT DECAY = 8 ms HALF VALUE IRSM/2 @ 20 ms
40 t, TIME (ms)
60
80
Figure 5. 8 X 20 ms Pulse Waveform
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SRV05-4MR6
TYPICAL PERFORMANCE CURVES
(TJ = 25C unless otherwise noted)
5.0 JUNCTION CAPACITANCE (pF) 4.5 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0 1 2 3 4 5 I/O lines I/O-Ground CLAMPING VOLTAGE (V) 4.0
30 25 20 15 10 5 0
0
2
4
6
8
10
12
VBR, REVERSE VOLTAGE (V)
PEAK PULSE CURRENT (A)
Figure 6. Junction Capacitance vs Reverse Voltage
Figure 7. Clamping Voltage vs. Peak Pulse Current (8 x 20 ms Waveform)
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SRV05-4MR6
APPLICATIONS INFORMATION The new SRV05-4MR6 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 events or transient overvoltage conditions. Because of its low capacitance, it can be used in high speed I/O data lines. The integrated design of the SRV05-4MR6 offers surge rated, low capacitance steering diodes and a TVS diode integrated in a single package (TSOP-6). If a transient condition occurs, the steering diodes will drive the transient to the positive rail of the power supply or to ground. The TVS device protects the power line against overvoltage conditions to avoid damage to the power supply and any downstream components. SRV05-4MR6 Configuration Options The SRV05-4MR6 is able to protect up to four data lines against transient overvoltage 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 (Vf or VCC + Vf). The diodes will force the transient current to bypass the sensitive circuit. Data lines are connected at pins 1, 3, 4 and 6. The negative reference is connected at pin 2. 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 the PCB trace lengths as much as possible to minimize parasitic inductances. Option 1 Protection of four data lines and the power supply using VCC as reference.
I/O 1 I/O 2 1 2 3 I/O 3 I/O 4 6 5 4 VCC I/O 3 I/O 4
Option 2 Protection of four data lines with bias and power supply isolation resistor.
I/O 1 I/O 2 VCC 1 2 3 I/O 3 I/O 4 6 5 4 10 k
The SRV05-4MR6 can be isolated from the power supply by connecting a series resistor between pin 5 and VCC. A 10 kW resistor is recommended for this application. This will maintain a bias on the internal TVS and steering diodes, reducing their capacitance. Option 3 Protection of four data lines using the internal TVS diode as reference.
I/O 1 I/O 2 1 2 3 6 5 4 NC
In applications lacking a positive supply reference or those cases in which a fully isolated power supply is required, the internal TVS can be used as the reference. For these applications, pin 5 is not connected. In this configuration, 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). ESD Protection of Power Supply Lines When using diodes for data line protection, referencing to a supply rail provides advantages. Biasing the diodes reduces their capacitance and minimizes signal distortion. Implementing this topology with discrete devices does have disadvantages. This configuration is shown below:
For this configuration, connect pin 5 directly to the positive supply rail (VCC), the data lines are referenced to the supply voltage. The internal TVS diode prevents overvoltage on the supply rail. Biasing of the steering diodes reduces their capacitance.
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SRV05-4MR6
Power Supply
VCC D1
IESDpos
Protected Data Line Device
IESDpos
IESDneg
D2 IESDneg
VF + VCC -VF
Looking at the figure above, it can be seen that when a positive ESD condition occurs, diode D1 will be forward biased while diode D2 will be forward biased when a negative ESD condition occurs. For slower transient conditions, this system may be approximated as follows: For positive pulse conditions: Vc = VCC + VfD1 For negative pulse conditions: Vc = -VfD2 ESD events can have rise times on the order of some number of nanoseconds. Under these conditions, the effect of parasitic inductance must be considered. A pictorial representation of this is shown below.
Power Supply VCC Protected Device D1 Data Line D2 VC = VCC + Vf + (L diESD/dt) IESDneg IESDpos IESDneg
Even with good board layout, some disadvantages are still present when discrete diodes are used to suppress ESD events across datalines and the supply rail. Discrete diodes with good transient power capability will have larger die and therefore higher capacitance. This capacitance becomes problematic as transmission frequencies increase. Reducing capacitance generally requires reducing die size. These small die will have higher forward voltage characteristics at typical ESD transient current levels. This voltage combined with the smaller die can result in device failure. The ON Semiconductor SRV05-4MR6 was developed to overcome the disadvantages encountered when using discrete diodes for ESD protection. This device integrates a TVS diode within a network of steering diodes.
D1
D3
D5
D7
D2
D4
D6
D8
0 IESDpos
Figure 8. SRV05-4MR6 Equivalent Circuit
During an ESD condition, the ESD current will be driven to ground through the TVS diode as shown below.
Power Supply VCC D1 IESDpos
An approximation of the clamping voltage for these fast transients would be: 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 on the L diESD/dt factor. A relatively small trace inductance can result in hundreds of volts appearing on the supply rail. This endangers both the power supply and anything attached to that rail. This highlights the importance of good board layout. Taking care to minimize the effects of parasitic inductance will provide significant benefits in transient immunity.
VC = -Vf - (L diESD/dt)
Protected Device
Data Line D2
The resulting clamping voltage on the protected IC will be: Vc = VF + VTVS. The clamping voltage of the TVS diode is provided in Figure 7 and depends 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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SRV05-4MR6
TYPICAL APPLICATIONS
UPSTREAM USB PORT VBUS VBUS D+ D- GND VBUS USB Controller RT RT VBUS CT CT
SRV05-4MR6
VBUS VBUS D+ D- GND
DOWNSTREAM USB PORT
VBUS
NUP2201DT1
RT RT CT CT
VBUS D+ D- GND DOWNSTREAM USB PORT
Figure 9. ESD Protection for USB Port
RJ45 Connector TX+ TX+
TX- TX- PHY Ethernet (10/100) RX+ Coupling Transformers
RX+
RX- RX- SRV05-4MR6 VCC GND N/C N/C
Figure 10. Protection for Ethernet 10/100 (Differential mode)
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SRV05-4MR6
R1 RTIP R2 VCC R3 T1
RRING
T1/E1 TRANCEIVER
SRV05-4MR6
R4 TTIP R5 T2
TRING
Figure 11. TI/E1 Interface Protection
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SRV05-4MR6
PACKAGE DIMENSIONS
TSOP-6 CASE 318G-02 ISSUE T
D
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. MAXIMUM LEAD THICKNESS INCLUDES LEAD FINISH THICKNESS. MINIMUM LEAD THICKNESS IS THE MINIMUM THICKNESS OF BASE MATERIAL. 4. DIMENSIONS A AND B DO NOT INCLUDE MOLD FLASH, PROTRUSIONS, OR GATE BURRS. DIM A A1 b c D E e L HE q MIN 0.90 0.01 0.25 0.10 2.90 1.30 0.85 0.20 2.50 0 MILLIMETERS NOM MAX 1.00 1.10 0.06 0.10 0.38 0.50 0.18 0.26 3.00 3.10 1.50 1.70 0.95 1.05 0.40 0.60 2.75 3.00 10 - MIN 0.035 0.001 0.010 0.004 0.114 0.051 0.034 0.008 0.099 0 INCHES NOM 0.039 0.002 0.014 0.007 0.118 0.059 0.037 0.016 0.108 - MAX 0.043 0.004 0.020 0.010 0.122 0.067 0.041 0.024 0.118 10
HE
6 1
5 2
4 3
E
b e c L q
0.05 (0.002) A1
A
SOLDERING FOOTPRINT*
2.4 0.094
1.9 0.075
0.95 0.037 0.95 0.037 0.7 0.028 1.0 0.039
SCALE 10:1
mm inches
*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 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. This literature is subject to all applicable copyright laws and is not for resale in any manner.
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SRV05-4MR6/D

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