RClamp1521P Ultra-Low Capacitance 1-Line ESD protection PROTECTION PRODUCTS - RailClamp® PROTECTION PRODUCTS Description Features The RailClamp family is a series of ultra low capacitance Transient Voltage Suppressors (TVS) 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 RClampTM1521P has a maximum capacitance of only 0.5pF. 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, Level 4 (±15kV air, ±8kV contact discharge). Transient protection for data lines to IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact) IEC 61000-4-4 (EFT) 40A (tp = 5/50ns) Cable Discharge Event (CDE) Ultra-small package (1.0 x 0.6 x 0.5mm) Protects one data or I/O line Low capacitance: 0.3pF typical Low clamping voltage Low operating voltage: 15V Solid-state silicon-avalanche technology Mechanical Characteristics The RClamp1521P is in a 2-pin, RoHS/WEEE compliant, SLP1006P2 package measuring 1.0 x 0.6 x 0.5mm. The leads are spaced at a pitch of 0.65mm and feature a lead-free finish. Each device will protect one highspeed line operating at 15 volts. It gives the designer the flexibility to protect single lines in applications where arrays are not practical. The combination of small size, low capacitance, and high ESD surge capability makes them ideal for use in applications such as cellular phones and high-power USB. SLP1006P2 package Molding compound flammability rating: UL 94V-0 Marking: Marking code Packaging : Tape and Reel Lead Finish: NiPdAu RoHS/WEEE Compliant Applications Dimensions Cellular Handsets & Accessories USB Ports PCI Express Serial ATA Schematic & PIN Configuration 1.0 0.60 0.65 0.50 Maximum Dimensions (mm) Revision 10/26/2007 SLP1006P2 (Bottom View) 1 www.semtech.com RClamp1521P PROTECTION PRODUCTS Absolute Maximum Rating Rating Symbol Value Units Peak Pulse Power (tp = 8/20μs) Ppk 120 Watts Peak Pulse Current (tp = 8/20μs) IPP 4 A ESD per IEC 61000-4-2 (Air) ESD per IEC 61000-4-2 (Contact) VESD +/- 15 +/- 8 kV TJ -55 to +125 °C TSTG -55 to +150 °C Operating Temperature Storage Temperature Electrical Characteristics (T=25oC) Parameter Symbo l Conditions Minimum Typical Maximum Units 15 V Reverse Stand-Off Voltage VRWM Reverse Breakdown Voltage V BR It = 1mA Reverse Leakage Current IR VRWM = 15V, T=25°C 1 μA Clamp ing Voltage VC IPP = 1A, tp = 8/20μs 28 V Clamp ing Voltage VC IPP = 4A, tp = 8/20μs 30 V Junction Cap acitance Cj 0.50 pF © 2007 Semtech Corp. VR = 0V, f = 1MHz 2 16.7 V 0.30 www.semtech.com RClamp1521P PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve 10 110 (kW) 100 % of Rated Power or I PP Peak Pulse Power - P PP 90 1 0.1 80 70 60 50 40 30 20 10 0 0.01 0.1 1 10 100 0 1000 25 50 75 100 125 150 Ambient Temperature - TA (oC) Pulse Duration - tp (μs) Normalized Capacitance vs. Reverse Voltage Clamping Voltage vs. Peak Pulse Current 35 2 1.5 25 CJ(VR) / CJ(VR=0) Clamping Voltage - V C (V) f = 1 MHz 30 20 15 10 Waveform Parameters: tr = 8μs td = 20μs 5 0 0 1 2 3 Peak Pulse Current - IPP (A) 4 1 0.5 0 5 0 1 2 3 ESD Clamping (8kV Contact per IEC 61000-4-2) 4 5 6 7 8 9 10 11 Reverse Voltage - VR (V) 12 13 14 15 Insertion Loss S21 CH1 S21 LOG 6 dB / REF 0 dB 1: -.08890 dB 900 MHz 2: -.21340 dB 1.8 GHz 1 2 34 3: -.0038 dB 2.5 GHz 0 dB 4: -.15310 dB 2.7 GHz -6 dB -12 dB -18 dB -24 dB -30 dB -36 dB Note: Data is taken with a 10x attenuator © 2007 Semtech Corp. 1 MHz START . 030 MHz 3 10 MHz 100 MHz 3 1 GHz GHz STOP 3000. 000000 MHz www.semtech.com RClamp1521P PROTECTION PRODUCTS Applications Information Device Connection Options Equivalent Circuit Diagram These low capacitance TVS diodes are designed to provide common mode protection for one high-speed line or differential protection for one line pair. The device is bidirectional and may be used on lines where the signal polarity is positive and negative. Circuit Board Layout Recommendations for Suppression of ESD. Good circuit board layout is critical for the suppression of ESD induced transients. The following guidelines are recommended: z Place the TVS near the input terminals or connectors to restrict transient coupling. z Minimize the path length between the TVS and the protected line. z Minimize all conductive loops including power and ground loops. z The ESD transient return path to ground should be kept as short as possible. z Never run critical signals near board edges. z Use ground planes whenever possible. © 2007 Semtech Corp. 4 www.semtech.com RClamp1521P PROTECTION PRODUCTS Applications Information - Spice Model I/O Line RClamp1521P Spice Model R Clamp1521P Spice Parameters © 2007 Semtech Corp. Parameter Unit D1 (LCR D) D2 (LCR D) D3 (T VS) IS A mp 1.0E-20 1.0E-20 2.0E-12 BV Volt 100 100 19.5 VJ Volt 0.7 0.7 0.6 RS Ohm 0.458 0.89 0.8 IB V A mp 1E-3 1E-3 1E-3 CJO Farad 0.4E-12 0.4E-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 5 www.semtech.com RClamp1521P PROTECTION PRODUCTS Outline Drawing - SLP1006P2 A B D DIMENSIONS INCHES MILLIMETERS DIM MIN NOM MAX MIN NOM MAX E TOP VIEW A SEATING PLANE aaa C C A1 A A1 b D E e L R N aaa bbb .016 .020 .022 .000 .001 .002 .018 .020 .022 .035 .039 .043 .020 .024 .028 .026 BSC .008 .010 .012 .002 .004 .006 2 .003 .004 0.40 0.50 0.55 0.00 0.03 0.05 0.45 0.50 0.55 0.90 1.00 1.10 0.50 0.60 0.70 0.65 BSC 0.20 0.25 0.30 0.05 0.10 0.15 2 0.08 0.10 PIN 1 ID R bxN bbb C A B 2x L e BOTTOM VIEW NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). Land Pattern - SLP1006P2 DIMENSIONS Y (C) DIM C G X Y Z Z G X INCHES (.033) .012 .024 .022 .055 MILLIMETERS (0.85) 0.30 0.60 0.55 1.40 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. © 2007 Semtech Corp. 6 www.semtech.com RClamp1521P PROTECTION PRODUCTS Marking Code Ordering Information ZZ Part Number Qty per Reel Reel Size RClamp1521P.TCT 3,000 7 Inch Note: Lead finish is lead-free NiPdAu. RailClamp and RClamp are marks of Semtech Corporation. PIN 1 ID Tape and Reel Specification A0 B0 0.69 +/-0.10 mm K0 1.19 +/-0.10 mm 0.66 +/-0.10 mm Tape Width B, (Max) D D1 8 mm 4.2 mm (.165) 1.5 + 0.1 mm - 0.0 mm (0.59 +.005 - .000) 0.8 mm ±0.25 (.031) E 1.750±0.1 mm (.069±.004) F K (Max) P P0 P2 T (Max) W 3.5±0.05 mm (.138±.002) 2.4 mm (.094) 4.0±0.10 mm (.157±.004) 4.0±0.1 mm (.157±.004) 2.0±0.05 mm (.079±.002) 0.4mm (.016) 8.0 mm + 0.3 mm - 0.1 mm (.312±.012) Contact Information Semtech Corporation Protection Products Division 200 Flynn Rd., Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 © 2007 Semtech Corp. 7 www.semtech.com