RClamp1502B Ultra-Low Capacitance TVS for ESD and CDE Protection PROTECTION PRODUCTS - RailClamp® Description Features Transient protection for high-speed data lines to 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 RClampTM1502B has a typical capacitance of only 0.60pF (pin 1 to 2). This means it can 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). Each device can be configured to protect 1 bidirectional line or two unidirectional lines. These devices are in a small SC-75 (SOT-523) package and feature a lead-free, matte tin finish. They are compatible with both lead free and SnPb assembly techniques. They are designed for use in applications where board space is at a premium. The combination of small size, low capacitance, and high level of ESD protection makes them a flexible solution for applications such as Automatic Test Equipment and Infiniband circuits. IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact) IEC 61000-4-4 (EFT) 40A (5/50ns) Designed to replace polymer TVS Protects up to two I/O lines Ultra-Low capacitance (<1pF) No insertion loss to >3.0GHz Low profile (<1mm) Low leakage current and clamping voltage Low operating voltage: 15.0V Solid-state silicon-avalanche technology Mechanical Characteristics SC-75 (SOT-523) package Lead Finish: Matte Tin RoHS/WEEE Compliant Molding compound flammability rating: UL 94V-0 Marking: P6 Packaging: Tape and Reel Applications Dimensions Automatic Test Equipment Firewire Ports GaAs Photodetector Protection HBT Power Amp Protection Infiniband Transceiver Protection Schematic & PIN Configuration 1.60 0.50 BSC 3 0.80 1 1.60 2 1.00 BSC 0.75 SC-75 3L (Top View) Nominal Dimensions (mm) Revision 2/3/2009 1 www.semtech.com RClamp1502B PROTECTION PRODUCTS Absolute Maximum Rating R ating Symbol Value Units Peak Pulse Power (tp = 8/20μs) Pp k 200 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 15 8 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 or Pin 2 to Pin 3 and Between Pins 1 and 2 Reverse Breakdown Voltage V BR It = 1mA Pin 1 or Pin 2 to Pin 3 and Between Pins 1 and 2 Reverse Leakage Current IR VRWM = 15V, T=25°C Pin 1 or Pin 2 to Pin 3 and Between Pins 1 and 2 1 μA Clamping Voltage VC IPP = 1A, tp = 8/20μs Pi n 1 to Pi n 2 32 V Clamping Voltage VC IPP = 5A, tp = 8/20μs Pin 1 or Pin 2 to Pin 3 36 V Clamping Voltage VC IPP = 5A, tp = 8/20μs Pi n 1 to Pi n 2 40 V Junction Capacitance Cj VR = 0V, f = 1MHz Pi n 1 to Pi n 2 0.9 pF Junction Capacitance Cj VR = 0V, f = 1MHz Pin 1 or Pin 2 to Pin 3 1.5 pF © 2009 Semtech Corp. 2 Minimum Typical Maximum Units 15 V 16.7 V 0.60 www.semtech.com RClamp1502B PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve 10 110 90 % of Rated Power or PI P Peak Pulse Power - PPk (kW) 100 1 0.1 80 70 60 50 40 30 20 10 0 0.01 0.1 1 10 100 0 1000 25 Clamping Voltage vs. Peak Pulse Current Pin 1 or Pin 2 to Pin 3 100 125 150 40 38 34 Clamping Voltage - VC (V) Clamping Voltage - VC (V) 75 Clamping Voltage vs. Peak Pulse Current Pin 1 to Pin 2 36 32 30 28 Waveform Parameters: tr = 8μs td = 20μs 26 36 34 32 30 Waveform Parameters: tr = 8μs td = 20μs 28 26 24 24 0 1 2 3 4 5 6 0 Peak Pulse Current - IPP (A) 2 3 Normalized Capacitance - Cj (pF) 0.8 0.6 0.4 0.2 f = 1 MHz 0 4 © 2009 Semtech Corp. 6 8 10 Reverse Voltage - VR (V) 6 1 f = 1 MHz 0.5 2 5 Line to Line Capacitance 1.2 1 0 4 Junction Capacitance vs. Reverse Voltage Pin 1 to Pin 2 Line to Ground Capacitance 1.5 1 Peak Pulse Current - IPP (A) Normalized Capacitance vs. Reverse Voltage Pin 1 or Pin 2 to Pin 3 Normalized Capacitance - Cj (pF) 50 Ambient Temperature - TA (oC) Pulse Duration - tp (µs) 12 14 0 3 5 10 Reverse Voltage - VR (V) 15 www.semtech.com RClamp1502B PROTECTION PRODUCTS Typical Characteristics Insertion Loss S21 (Pin 1 to Pin 2) CH1 S21 LOG Insertion Loss S21 (Pin 1 or Pin 2 to Pin 3) 6 dB / REF 0 dB CH1 S21 3 LOG 6 dB / REF 0 dB 1: .03430 dB 900 MHz 1: .00460 dB 900 MHz 2: .07870 dB 1.8 GHz 2: .02010 dB 1.8 GHz 3: .28040 dB 2.5 GHz 3 0 dB 3: -.08180 dB 2.5 GHz 0 dB 1 2 1 -6 dB -6 dB -12 dB -12 dB -18 dB -18 dB -24 dB -24 dB -30 dB -30 dB -36 dB 1 MHz 10 MHz 100 MHz -36 dB 3 1 GHz GHz STOP 3000. 000000 MHz START . 030 MHz 1 MHz START . 030 MHz 10 MHz 100 MHz 2 3 1 GHz GHz STOP 3000. 000000 MHz ESD Response (8kV Contact per IEC 61000-4-2) ESD Response (4kV Contact per IEC 61000-4-2) Analog Crosstalk CH1 S21 LOG START. 030 MHz © 2009 Semtech Corp. 20 dB /REF 0 dB STOP 3000. 000000 MHz 4 www.semtech.com RClamp1502B PROTECTION PRODUCTS Applications Information Figure 1. Pin Configuration Device Connection Options This device is optimized for protection of 1 line operating in excess of 3GHz. It may also be used to protect two lines, but it is recommended it not be used much beyond 1GHz due to cross talk limitations. The device is connected as follows: One data line can be connected to either pin 1 or pin 2 with the other connected to ground. The connection to ground should be made directly to a ground plane. The path length should also be kept as short as possible to minimize parasitic inductance. Pin 3 is not connected. Protection of two lines is achieved by connecting data lines at pins 1 & 2. Pin 3 is connected to ground. The connection to ground should be made directly to a ground plane. The path length should also be kept as short as possible to minimize parasitic inductance. Matte Tin Lead Finish Matte tin has become the industry standard lead-free replacement for SnPb lead finishes. A matte tin finish is composed of 100% tin solder with large grains. Since the solder volume on the leads is small compared to the solder paste volume that is placed on the land pattern of the PCB, the reflow profile will be determined by the requirements of the solder paste. Therefore, these devices are compatible with both lead-free and SnPb assembly techniques. In addition, unlike other lead-free compositions, matte tin does not have any added alloys that can cause degradation of the solder joint. © 2009 Semtech Corp. 5 www.semtech.com RClamp1502B PROTECTION PRODUCTS Applications Information - Spice Model RClamp1502B Spice Model Table 1 - R Clamp1502B Spice Parameters © 2009 Semtech Corp. Parameter Unit D1 (T VS) D2 (T VS) IS A mp 1.23E-14 1.23E-14 BV Volt 21.8 21.8 VJ Volt 0.72 0.72 RS Ohm 2.801 2.801 IB V Amp 1.0E-3 1.0E-3 CJO Farad 1.3E-12 1.3E-12 TT sec 2.541E-9 2.541E-9 M -- 0.033 0.033 N -- 1.1 1.1 EG eV 1.11 1.11 6 www.semtech.com RClamp1502B PROTECTION PRODUCTS Outline Drawing -SC-75 (SOT-523) DIMENSIONS MILLIMETERS MIN NOM MAX D A DIM e1 B 3 E E1 1 2 bxN bbb e A A2 C A B A A1 A2 b c D E E1 e e1 L L1 N 0 aaa bbb 0.90 0.10 0.75 0.80 0.30 0.20 1.60 1.70 1.60 1.75 0.80 0.85 1.00 BSC 0.50 BSC 0.10 0.22 0.30 (0.40) 3 0° 8° 0.10 0.20 0.60 0.00 0.60 0.15 0.10 1.50 1.45 0.75 aaa C SEATING PLANE A1 C SEE DETAIL A H c GAUGE PLANE 0.25 01 L (L1) SIDE VIEW DETAIL A NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. DATUMS -A- AND -B- TO BE DETERMINED AT DATUM PLANE -H- 3. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. Land Pattern -SC-75 (SOT-523) X Y Z C DIM C P p1 G X Y Z G Y DIMENSIONS INCHES MILLIMETERS (.055) .039 .020 .024 .016 .031 .087 (1.40) 1.00 0.50 0.60 0.40 0.80 2.20 p1 P NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. © 2009 Semtech Corp. 7 www.semtech.com RClamp1502B PROTECTION PRODUCTS Marking Ordering Information P6 Part Number Qty per Reel Reel Size RClamp 1502B.TCT 3,000 7 Inch RailClamp and RClamp are registered marks of Semtech Corporation Tape and Reel Specification Device Orientation in Tape A0 B0 K0 1.85±0.05mm 1.85±0.05mm 0.88±0.05mm Tap e Width B, (Max) D D1 ( M IN ) 8 mm 4.2 mm (.165) 1.5 + 0.1 mm - 0.0 mm (0.59 +.005 - .000) 1.0 mm (.039) E 1.750±.10 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±0.1 mm (.157±.004) 4.0±0.1 mm (.157±.004) 2.0±0.05mm (.079±.002) 0.4 mm (.016) 8.3 mm (.312±.012) Contact Information Semtech Corporation Protection Products Division 200 Flynn Rd., Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 © 2009 Semtech Corp. 8 www.semtech.com