RClamp0544T RailClamp® Ultra Low Capacitance TVS Arrays PROTECTION PRODUCTS - RailClamp® Description PRELIMINARY Features RailClamps® are ultra low capacitance TVS arrays designed to protect high speed data interfaces. This series has been specifically designed to protect sensitive components which are connected to high-speed data and transmission lines from overvoltage caused by ESD (electrostatic discharge), CDE (Cable Discharge Events), and EFT (electrical fast transients). The RClamp®0544T has a typical capacitance of only 0.30pF between I/O pins. This allows it to be used on circuits operating in excess of 3GHz without signal attenuation. They may be used to meet the ESD immunity requirements of IEC 61000-4-2. Each device is designed to protect four lines (two differential pairs). The RClamp0544T is in an 8-pin SLP2010P8T package. It measures 2.0 x 1.0 x 0.4mm. The leads are spaced at a pitch of 0.4mm and are finished with lead-free NiPdAu. They are designed for easy PCB layout by allowing the traces to run straight through the device. The combination of small size, low capacitance, and high level of ESD protection makes them a flexible solution for applications such as mini HDMI, MDDI, USB, and eSATA interfaces. ESD protection for high-speed data lines to IEC 61000-4-2 (ESD) ±18kV (air), ±12kV (contact) IEC 61000-4-5 (Lightning) 5A (8/20μs) IEC 61000-4-4 (EFT) 40A (5/50ns) Package design optimized for high speed lines Flow-Through design Protects four I/O lines Low capacitance: 0.3pF typical (I/O to I/O) Low clamping voltage Low operating voltage: 5V Solid-state silicon-avalanche technology Mechanical Characteristics SLP2010P8T 8-pin package (2.0 x 1.0 x 0.4mm) Pb-Free, Halogen Free, RoHS/WEEE Compliant Lead Pitch: 0.4mm Lead finish: NiPdAu Marking: Marking code + date code Packaging: Tape and Reel Applications Dimensions Cell Phones and Accessories HDMI MDDI Ports USB 3.0 LVDS eSATA PCI Express Circuit Diagram 2.00 1 2 GND 3 4 1.00 8 7 6 Pin 1 5 Pin 2 Pin 3 Pin 4 0.40 BSC GND 0.40 Note: Pins 5-8 not internally connected Nominal Dimensions in mm Revision 2/25/2011 4-Line Protection 1 www.semtech.com RClamp0544T PRELIMINARY PROTECTION PRODUCTS Absolute Maximum Rating R ating Symbol Value Units Peak Pulse Power (tp = 8/20μs) Pp k 75 Watts Peak Pulse Current (tp = 8/20μs) IP P 5 A ESD p er IEC 61000-4-2 (Air) ESD p er IEC 61000-4-2 (Contact) VESD +/- 18 +/- 12 kV TJ -55 to +125 °C TSTG -55 to +150 °C Op erating Temp erature Storage Temp erature Electrical Characteristics (T=25oC) Parameter Symbol Conditions Reverse Stand-Off Voltage VRWM Pin 1, 2, 3, or 4 to GN D Reverse Breakdown Voltage V BR It = 1mA, Pin 1, 2, 3, or 4 to GN D Reverse Leakage Current IR VRWM = 5.0V, Pin 1, 2, 3, or 4 to GN D Clamp ing Voltage VC Clamp ing Voltage Junction Cap acitance © 2011 Semtech Corp. Maximum Units 5 V 8 11 V 0.005 0.100 μA IPP = 1A, tp = 8/20μs Pin 1, 2, 3, or 4 to GN D 12 V VC IPP = 5A, tp = 8/20μs Pin 1, 2, 3, or 4 to GN D 15 V Cj VR = 0V, f = 1MHz, Pin 1, 2, 3, or 4 to GN D 0.45 0.60 pF VR = 0V, f = 1MHz, Between I/O p ins 0.3 0.4 pF 2 Minimum 6.5 Typical www.semtech.com RClamp0544T PRELIMINARY PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time Pulse Waveform 110 Waveform Parameters: tr = 8µs td = 20µs 100 10 Peak Pulse Power - P PP (kW) 90 PP 80 Percent of I 1 0.1 70 e-t 60 50 40 td = IPP/2 30 20 10 0 0.01 0.1 1 10 0 100 5 Pulse Duration - tp (us) 10 15 20 25 30 Time (µs) Normalized Capacitance vs. Reverse Voltage Clamping Voltage vs. Peak Pulse Current 25 2 f = 1MHz 20 1.6 Line to Line 1.4 15 10 CJ(VR) / CJ(VR=0) Clamping Voltage -VC (V) 1.8 Line to Gnd Waveform Parameters: tr = 8µs td = 20µs 5 1 2 3 4 5 1 0.8 0.6 0.4 0.2 0 0 1.2 6 0 0 Peak Pulse Current - IPP (A) ESD Clamping (Pin 1, 2, 3, or 4 to GND) (+8kV Contact per IEC 61000-4-2) 1 2 3 Reverse Voltage - VR (V) 4 5 USB 2.0 Eye Pattern with RClamp0544T Note: Data is taken with a 10x attenuator © 2011 Semtech Corp. 3 www.semtech.com RClamp0544T PRELIMINARY PROTECTION PRODUCTS Typical Characteristics (Con’t) Insertion Loss S21 - I/O to I/O CH1 S21 LOG Insertion Loss S21 - I/O to GND 6 dB / REF 0 dB CH1 S21 LOG 6 dB / REF 0 dB 1: -0.0715 dB 800 MHz 5 0 dB 12 3 1: -0.2214 dB 800 MHz 2: -0.0442 dB 900 MHz 5 0 dB 12 4 3: -0.4690 dB 1.8 GHz -6 dB -12 dB -18 dB -12 dB -24 dB -30 dB -30 dB -36 dB -36 dB -42 dB -42 dB -48 dB 1 MHz START. 030 MHz 10 MHz 100 MHz -48 dB 3 1 GHz GHz STOP 3 000. 000000 MHz 1 MHz START. 030 MHz HDMI Eye Pattern (720p with RClamp0544T) © 2011 Semtech Corp. 4: -0.2029 dB 2.5 GHz -18 dB -24 dB 2: -0.2095 dB 900 MHz 4 3: -0.6419 dB 1.8 GHz -6 dB 4: -0.5150 dB 2.5 GHz 3 10 MHz 100 MHz 3 1 GHz GHz STOP 3 000. 000000 MHz HDMI Eye Pattern (1080p with RClamp0544T) 4 www.semtech.com RClamp0544T PRELIMINARY PROTECTION PRODUCTS Applications Information Design Recommendations for HDMI Protection Adding external ESD protection to HDMI ports can be challenging. First, ESD protection devices have an inherent junction capacitance. When adding even a small amount of capacitance, it will cause the impedance of the differential pair to drop. Second, large packages and land pattern requirements can cause discontinuities that adversely affect signal integrity. The RClamp0544T is specifically designed for protection of high-speed interfaces, such as HDMI. It presents <0.3pF capacitance between the pairs while being rated to handle >±8kV ESD contact discharges (>±15kV air discharge) as outlined in IEC 61000-4-2. The device is in a leadless SLP package that is less than 1.1mm wide. It is designed such that the traces flow straight through the device. The narrow package and flow-through design reduce discontinuities and minimize impact on signal integrity. This becomes even more critical as signal speeds increase. Input 1 1 8 NC Input 2 2 7 NC GND Input 3 3 6 NC Input 4 4 5 NC Figure 1 - SLP2010P8T Pin Configuration (Top View) Pin Identification 1, 2, 3, 4 Inp ut Lines 5, 6, 7, 8 Outp ut Lines (N o Internal Connection) Center Tab Ground Pin Configuration Figure 2 is an example of how to route the high speed differential traces through the RClamp0544T. The PCB traces are used to connect the pin pairs for each line (pin 1 to pin 8, pin 2 to pin 7, pin 3 to pin 6, pin 4 to pin 5). For example, line 1 enters at pin 1 and exits at Pin 8, and the PCB trace connects pin 1 and 8 together. This is true for lines connected at pins 2, 3, and 4 also. Note that there are no internal connections to pins 5 - 8. Ground is connected at the center tabs. One large ground pad should be used in lieu of two separate pads. TDR Measurements for HDMI The combination of low capacitance, small package, and flow-through design means it is possible to use these devices to meet the HDMI impedance requirements of 100 Ohm ±15% without any PCB board modification. For signal integrity purposes, the best results will be obtained by using the RClamp0544T to protect the high-speed differential pairs. This is because the device is designed such that the data lines from the connector line up with the I/O pins of the device without altering the trace routing. © 2011 Semtech Corp. Figure 2 - Flow through Layout Using RClamp0544T 5 www.semtech.com RClamp0544T PRELIMINARY PROTECTION PRODUCTS Applications Information Data 2+ Data 2Data 1+ Data 1- To HDMI Graphics Chip Data 0+ Data 0-Clk+ ClkRClamp0544T (3 Each) CEC SCL SDA HP Detect 5VPower Gnd Figure 3. HDMI Protection Example Host Rx Host Rx + B- A- Host Plug A+ ESATA Host Tx + Host Tx - B+ RClamp0544T A+ Dev Rx + Dev Rx - ESATA Device Plug A- B- Dev Tx Dev Tx + B+ - RClamp0544T Figure 4. eSA TA Pr o t ection Exam ple eSAT Pro Example © 2011 Semtech Corp. 6 www.semtech.com RClamp0544T PRELIMINARY PROTECTION PRODUCTS Applications Information MDDI_Data0+ MDDI_Data0Gnd Gnd MDDI Link Controller MDDI_Data1+ MDDI Link Controller MDDI_Data1RClamp0544T RClamp0544T MDDI_Stb+ MDDI_StbGnd Gnd RClamp0522T RClamp0522T Host Pwr Host Gnd HOST uClamp0501P uClamp0501P DISPLAY Figure 5. MDDI Protection Example © 2011 Semtech Corp. 7 www.semtech.com RClamp0544T PRELIMINARY PROTECTION PRODUCTS Applications Information - Spice Model RClamp0544T Spice Model R Clamp0544T Spice Parameters Parameter Unit D1 D2 D3 IS Amp 1E-20 1E-20 2E-12 BV Volt 100 100 8.2 VJ Volt 0.83 0.83 0.6 RS Ohm 1.5 0.6 0.2 IB V Amp 1E-3 1E-3 1E-3 CJO Farad 0.25E-12 0.25E-12 56E-12 TT sec 2.541E-9 2.541E-9 2.541E-9 M -- 0.01 0.01 0.23 N -- 1.1 1.1 1.1 EG eV 1.11 1.11 1.11 Note: Spice model is for simulating transient response only. © 2011 Semtech Corp. 8 www.semtech.com RClamp0544T PRELIMINARY PROTECTION PRODUCTS Outline Drawing - SO-8 Outline SLP2010P8T A D B DIM E PIN 1 INDICATOR (LASER MARK) A SEATING PLANE aaa C A2 .015 .016 .017 0.00 .001 .002 (.005) .006 .008 .010 .077 .079 .082 .037 .039 .043 .016 BSC .013 .015 .017 8 .003 .004 0.37 0.40 0.43 0.00 0.02 0.05 (0.13) 0.15 0.20 0.25 1.95 2.00 2.08 0.95 1.00 1.08 0.40 BSC 0.32 0.38 0.43 8 0.08 0.10 C A1 1 A A1 A2 b D E e L N aaa bbb DIMENSIONS INCHES MILLIMETERS MIN NOM MAX MIN NOM MAX 2 LxN E/2 N R 0.075 bxN e bbb C A B D/2 NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). Land Pattern - SLP2010P8T (C) G DIM C G P X Y Z Z Y P DIMENSIONS INCHES MILLIMETERS (.035) (0.88) 0.21 .008 0.40 .016 .008 0.20 .026 0.67 .061 1.55 X NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. © 2011 Semtech Corp. 9 www.semtech.com RClamp0544T PRELIMINARY PROTECTION PRODUCTS Marking Codes Ordering Information 0544T PIN 1 INDICATOR YYWW Part Number Qty per Reel R eel Size RClamp0544T.TCT 3000 7 Inch RailClamp and RClamp are marks of Semtech Corporation YYWW = Date Code Tape and Reel Specification Pin 1 Location User Direction of feed Device Orientation in Tape A0 1.21 +/-0.05 mm B0 K0 2.21 +/-0.05 mm Tape Width B, (Max) D 8 mm 4.2 mm 1.5 + 0.1 mm - 0.0 mm ) 0.66 +/-0.05 mm D1 E 0.5 mm ±0.05 1.750±.10 mm F K (MAX) P P0 P2 T(MAX) 3.5±0.05 mm 2.4 mm 4.0±0.1 mm 4.0±0.1 mm 2.0±0.05 mm 0.4 mm W 8.0 mm + 0.3 mm - 0.1 mm Contact Information Semtech Corporation Protection Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 © 2011 Semtech Corp. 10 www.semtech.com