RClamp0522P RClamp0524P Ultra Low Capacitance TVS Arrays PROTECTION PRODUCTSPRODUCTS - RailClamp PRELIMINARY Description Features RailClamps are ultra low capacitance TVS arrays ESD protection for high-speed data lines to designed to protect high speed data interfaces. This IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact) series has been specifi cally designed to protect sensitive IEC 61000-4-5 (Lightning) 5A (8/20µs) components which are connected to high-speed data IEC 61000-4-4 (EFT) 40A (5/50ns) and transmission lines from overvoltage caused by ESD Package design optimized for high speed lines (electrostatic discharge), CDE (Cable Discharge Events), Flow-Through design and EFT (electrical fast transients). Protects two or four I/O lines TM TM The RClamp 0522P and RClamp 0524P have a Low capacitance: 0.3pF typical (I/O to I/O) typical capacitance of only 0.30pF between I/O pins. Low clamping voltage This allows it to be used on circuits operating in excess Low operating voltage: 5V of 3GHz without signal attenuation. They may be used to Solid-state silicon-avalanche technology meet the ESD immunity requirements of IEC 61000-4-2, Level 4 (±15kV air, ±8kV contact discharge). The Mechanical Characteristics RClamp0522P is designed to protect two lines, while the SLP1610P4 6-pin package (1.6 x 1.0 x 0.58mm) RClamp0524P will protect four lines. SLP2510P8 10-pin package (2.5 x 1.0 x 0.58mm) The RClamp0522P is in a 6-pin, RoHS/WEEE compliant, RoHS/WEEE Compliant SLP1610P4 package. It measures 1.6 x 1.0 x 0.58mm. Lead Pitch: 0.5mm The RClamp0524P is in a 10-pin, RoHS/WEEE compliant, SLP2510P8 package. It measures 2.5 x 1.0 x 0.58mm. Lead fi nish: NiPd The leads are spaced at a pitch of 0.5mm and are fi nished Marking: Marking Code with lead-free NiPd. They are designed for easy PCB layout Packaging: Tape and Reel per EIA 481 by allowing the traces to run straight through the device. Applications The combination of small size, low capacitance, and high level of ESD protection makes them a fl exible solution for High Defi nition Multi-Media Interface (HDMI) applications such as HDMI, UDI, DisplayPortTM, MDDI, Serial Digital Visual Interface (DVI) ATA, and Infi niband circuits. Unifi ed Display Interface (UDI) DisplayPortTM Interface MDDI Ports PCI Express Serial ATA Circuit Diagram - RClamp0522P Circuit Diagram - RClamp0524P Pin 1 Pin 2 Pin 1 Pin 2 Pin 4 Pin 5 3, 4 3, 8 2-Line Protection 4-Line Protection Revision 09/19/2006 1 www.semtech.com RClamp0522P RClamp0524P Ultra Low Capacitance TVS Arrays PROTECTION PRODUCTSPRODUCTS - RailClamp PRELIMINARY Pin Identifi cation and Confi guration RClamp0522P RClamp0524P 10 9 8 7 6 65 4 123 123 45 Pin Identification Pin Identification 1 - 2 Input Lines 1, 2, 4, 5 Input Lines Output Lines Output Lines 5 - 6 6, 7, 9, 10 (No Internal Connection) (No Internal Connection) 3 - 4 Ground 3, 8 Ground SLP1610P4 Pin Confi guration (Top View) SLP2510P8 Pin Confi guration (Top View) Pin 1 Pin 2 Pin 1 Pin 2 Pin 4 Pin 5 3, 4 3, 8 Circuit Diagram Circuit Diagram Ordering Information Number Qty per Part Number Reel Size of Lines Reel RClamp0522P.TCT 2 3000 7 Inch RClamp0524P.TCT 4 3000 7 Inch Note: Lead fi nish is lead-free NiPd. RailClamp and RClamp are marks of Semtech Corporation. 2 www.semtech.com RClamp0522P RClamp0524P PROTECTION PRODUCTS PRELIMINARY Absolute Maximum Rating Rating Symbol Value Units Peak Pulse Power (tp = 8/20µs) Ppk 150 Watts Peak Pulse Current (tp = 8/20µs) IPP 5A ESD per IEC 61000-4-2 (Air) VESD +/- 17 kV ESD per IEC 61000-4-2 (Contact) +/- 12 Operating Temperature TJ -55 to +125 °C Storage Temperature TSTG -55 to +150 °C Electrical Characteristics (T=25oC) Parameter Symbol Conditions Minimum Typical Maximum Units Reverse Stand-Off Voltage VRWM Any I/O pin to ground 5 V Reverse Breakdown Voltage VBR It = 1mA 6V Any I/O pin to ground Reverse Leakage Current IR VRWM = 5V, T=25°C 1µA Any I/O pin to ground Clamping Voltage VC IPP = 1A, tp = 8/20µs 15 V Any I/O pin to ground V = 0V, f = 1MHz 0.30 0.4 pF Junction Capacitance C R j Between I/O pins V = 0V, f = 1MHz 0.8 pF Junction Capacitance C R j Any I/O pin to ground 2006 Semtech Corp. 3 www.semtech.com RClamp0522P RClamp0524P PROTECTION PRODUCTS PRELIMINARY Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve 10 110 100 90 PP (kW) 80 PP 1 70 60 50 40 0.1 30 % of Rated Power or I 20 Peak Pulse Power - P 10 0 0.01 0 25 50 75 100 125 150 0.1 1 10 100 1000 Ambient Temperature - T (oC) Pulse Duration - tp (us) A Pulse Waveform Clamping Voltage vs. Peak Pulse Current 110 40 100 Waveform Parameters: 35 90 tr = 8µs 30 80 td = 20µs (V) Line to Line C PP 70 e-t 25 60 50 20 Line to Gnd Percent of I 40 td = IPP/2 15 30 10 Waveform 20 Clamping Voltage -V Parameters: tr = 8µs 10 5 td = 20µs 0 0 0 5 10 15 20 25 30 0123456 Time (µs) Peak Pulse Current - IPP (A) Normalized Capacitance vs. Reverse Voltage ESD Clamping for +8kV pulse per IEC 61000-4-2 1.5 1.4 1.3 1.2 1.1 1 =0) 0.9 R (V 0.8 J 0.7 ) / C R 0.6 (V J 0.5 C 0.4 0.3 0.2 0.1 f = 1 MHz 0 012345 Reverse Voltage - VR (V) 2006 Semtech Corp. 4 www.semtech.com RClamp0522P RClamp0524P PROTECTION PRODUCTS PRELIMINARY Typical Characteristics (Con’t) Insertion Loss S21 - I/O to I/O Insertion Loss S21 - I/O to GND CH1 S21 LOG 6 dB / REF 0 dB CH1 S21 LOG 6 dB / REF 0 dB 1: -0.076 dB 1: -0.086 dB 900 MHz 900 MHz 3 2: -0.062 dB 3 2: -0.0336 dB 0 dB 1.8 GHz 0 dB 1.8 GHz 1 2 1 2 -6 dB 3: -0.1087 dB -6 dB 3: -0.126 dB 2.5 GHz 2.5 GHz -12 dB -12 dB -18 dB -18 dB -24 dB -24 dB -30 dB -30 dB -36 dB -36 dB -42 dB -42 dB -48 dB -48 dB 1 10 100 1 3 1 10 100 1 3 MHz MHz MHz GHz GHz MHz MHz MHz GHz GHz START . 030 MHz STOP 3 000. 000000 MHz START . 030 MHz STOP 3 000. 000000 MHz 2006 Semtech Corp. 5 www.semtech.com RClamp0522P RClamp0524P PROTECTION PRODUCTS PRELIMINARY 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. However, adding even a small amount of capacitance will cause the impedance 1 12 of the differential pair to drop. Second, large packages 11 and land pattern requirements cause discontinuities that 10 adversely affect signal integrity. The RClamp0524P and GND GND RClamp0522P are specifi cally designed for protection 9 8 of high-speed interfaces such as HDMI. They present 7 <0.4pF capacitance between the pairs while being rated to handle >±8kV ESD contact discharges (>±15kV air 1 6 discharge) as outlined in IEC 61000-4-2. Each device is 5 in a leadless SLP package that is less than 1.1mm wide. 4 They are designed such that the traces fl ow straight HDMI Connector GND GND through the device. The narrow package and fl ow- 3 through design reduces discontinuities and minimizes 2 impact on signal integrity. This becomes even more 1 critical as signal speeds increase. Pin Confi guration Figure 1. Flow through Layout Using RClamp0524P Figure 1 is an example of how to route the high speed differential traces through the RClamp0524P. The solid line represents the PCB trace. The PCB traces are used to connect the pin pairs for each line (pin 1 to pin 10, pin 2 to pin 9, pin 4 to pin 7, pin 5 to pin 6). For example, line 1 enters at pin 1 and exits at Pin 10 and the PCB trace connects pin 1 and 10 together. This is true for lines connected at pins 2, 4, and 5 also. Ground is connected at pins 3 and 8. One large ground pad should be used in lieu of two separate pads. The same layout rules apply for the RClamp0522P. TDR Measurements for HDMI The combination of low capacitance, small package, and fl ow-through design means it is possible to use these devices to meet the HDMI impedance requirements of 100 Ohms ±15% without any PCB board modifi cation. Figures 2 and 3 show impedance test results for a TDR risetime of 200ps and 100ps respectively, using a Sem- tech evaluation board with 100 Ohm traces throughout. Measurements were taken using a TDR method as out- lined in the HDMI Compliance Test Specifi cation (CTS). In each case, the device meets the HDMI CTS require- 2006 Semtech Corp. 6 www.semtech.com RClamp0522P RClamp0524P PROTECTION PRODUCTS PRELIMINARY Applications Information ment of 100 Ohm ±15% with plenty of margin. For signal integrity purposes, the best results will be obtained by using the RClamp0524P to protect the high- speed differential pairs. This is because the B 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.