PROTECTIO PRODUCTS - RailClamp Description RailClamp TVS arrays are ultra low capacitance ESD protection devices 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 521P has a maximum capacitance of only.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 iunity requirements of IEC 61-4-2, Level 4 (±15kV air, ±8kV contact discharge). The RClamp521P is in a 2-pin SLP16P2 package measuring 1. x.6 x.5. The leads are spaced at a pitch of.65 and feature a lead-free finish. Each device will protect one high-speed line operating at 5 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 digital video interfaces. Features Applications RClamp521P Ultra-Low Capacitance 1-Line ESD protection PRELIMIARY u Transient protection for data lines to IEC 61-4-2 (ESD) ±15kV (air), ±8kV (contact) IEC 61-4-4 (EFT) 4A (tp = 5/5ns) Cable Discharge Event (CDE) u Ultra-small package (1. x.6 x.5) u Protects one data or I/O line u Low capacitance:.5pf u Low clamping voltage u Low operating voltage: 5.V u Solid-state silicon-avalanche technology Mechanical Characteristics u SLP16P2 package u Molding compound flaability rating: UL 94V- u Marking: Marking code u Packaging: Tape and Reel u Lead Finish: ipdau u Pb-Free, Halogen Free, RoHS/WEEE Compliant u Cellular Handsets & Accessories u Digital Visual Interface (DVI) u Display Port u MDDI Ports u USB Ports u PCI Express u Serial ATA Dimensions Schematic & Pin Configuration 1..65.6.5 Revision 1/27/215 ominal Dimensions () SLP16P2 (Bottom View) 1
PROTECTIO PRODUCTS Absolute Maximum Rating RClamp521P PRELIMIARY Rating Symbol Value Units Peak Pulse Power (tp = 8/2µs) M aximum Peak Pulse Current ( tp = 8/2µs) P pk 1 Watts I pp 4 Amps ESD per IEC 61-4-2 ESD per IEC 61-4-2 (Air) (Contact) V ESD +/- 15 +/- 8 kv Operating Temperature T J -55 to +125 C Storage Temperature T STG 55 to +15 - C Electrical Characteristics (T=25 o C) Parameter Symbol Conditions Minimum Typical Maximum Units Reverse Stand-Off Voltage V RWM 5 V Reverse Breakdown Voltage V R B I t = 1mA 6 9. 3 11 V Reverse Leakage Current I R V RWM = 5V, T=25 C.25 1 µ A Clamping Voltage V C I PP = 1A, tp = 8/2µ s 15 V Clamping Voltage V C I PP = 4A, tp = 8/2µ s 25 V V Junction Capacitance C R = V, f = 1MHz.3.5 pf j 212 Semtech Corporation 2
RClamp521P PROTECTIO PRODUCTS Typical Characteristics on-repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve PRELIMIARY 1 12 Peak Pulse Power - P PP (kw) 1.1 % of Rated Power or I PP 1 8 6 4 2.1 Clamping Voltage vs. Peak Pulse Current DR4412-1.1 1 1 1 1 Pulse Duration - tp (µs) 25 5 75 1 125 15 Ambient Temperature - T A ( O C) TLP Characteristic (Positive Pulse) DR4512:25:125:15 25 3 Clamping Voltage - V C (V) 2 15 1 5 Waveform Parameters: tr = 8µs td = 2µs 1 2 3 4 5 Peak Pulse Current - I PP (A) TLP Current (A) 25 2 15 1 R DY =.9 Ohms TLP 5 Parameters: tp = 1ns tr = 2ps 1 2 3 4 5 TLP Voltage (V) ormalized Capacitance vs. Reverse Voltage Typical Insertion Loss (S21) 2 f = 1 MHz -2 1.5 C J (V R ) / C J (V R =) 1 Insertion Loss (db) -4-6 S21 (db).5-8 1 2 3 4 5 Reverse Voltage - V R (V) -1 RCamp521P_SW IL-1G 2 4 6 8 1 Frequency (GHz) 212 Semtech Corporation 3
RClamp521P PROTECTIO PRODUCTS Typical Characteristics PRELIMIARY ESD Clamping (+8kV Contact per IEC 61-4-2) ESD Clamping (-8kV Contact per IEC 61-4-2) 35 3 25 T A = 25 O C Corrected for 4dB attenuation Measured with 5 Ohm, 4dB attenuator 5 Ohm Scope input impedance -5-1 Voltage (V) 2 15 Voltage (V) -15-2 1 5 RClamp521P D2181 ESD +8kV -25-3 T A = 25 o C Corrected for 4dB attenuation Measured with 5Ω, 4dB attenuator 5Ω Scope input impedance -1 1 2 3 4 5 6 RClamp521P D2181 ESD -8kV -35-1 1 2 3 4 5 6 Time (ns) Time (ns) Applications Information Device Connection Options These low capacitance TVS diodes are designed to provide coon 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. Equivalent Circuit Diagram Circuit Board Layout Recoendations for Suppression of ESD. Good circuit board layout is critical for the suppression of ESD induced transients. The following guidelines are recoended: Place the TVS near the input terminals or connectors to restrict transient coupling. Minimize the path length between the TVS and the protected line. Minimize all conductive loops including power and ground loops. The ESD transient return path to ground should be kept as short as possible. ever run critical signals near board edges. Use ground planes whenever possible. 212 Semtech Corporation 4
PROTECTIO PRODUCTS Applications Information - Spice Model RClamp521P PRELIMIARY I/O Line RClamp521P Spice Model RClamp521P Spice Parameters Parameter IS BV VJ RS IBV CJO TT U nit D 1 (LCRD) D 2 (LCRD) D3 (TVS) Amp 1.E-2 1.E-2 2.E-12 Volt 1 1 9.36 Volt. 7. 7. 6 Ohm.458.89. 8 Farad.4E-12.4E-12 56E-12 Amp 1E-3 1E-3 1E-3 sec 2.541E- 9 2.541E- 9 2.541E- 9 M --.1.1.23 -- 1. 1 1. 1 1. 1 EG ev 1.11 1.11 1.11 212 Semtech Corporation 5
PROTECTIO PRODUCTS Outline Drawing -- SO-8 SLP16P2 RClamp521P PRELIMIARY A D B aaa C A1 TOP VIEW E A C SEATIG PLAE DIMESIOS ICHES MILLIMETERS DIM MI OM MAX MI OM MAX A.16.2.22.4.5.55 A1..1.2..3.5 b.18.2.22.45.5.55 D.35.39.43.9 1. 1.1 E.2.24.28.5.6.7 e.26 BSC.65 BSC L.8.1.12.2.25.3 R.2.4.6.5.1.15 2 2 aaa.3.8 bbb.4.1 PI 1 ID bx bbb C A B R e 2x L BOTTOM VIEW OTES: 1. COTROLLIG DIMESIOS ARE I MILLIMETERS (AGLES I DEGREES). Land Pattern - SLP16P2 (C) G Z X Y DIMESIOS DIM ICHES MILLIMETERS C (.33) (.85) G X.12.24.3.6 Y.22.55 Z.55 1.4 OTES: 1. COTROLLIG DIMESIOS ARE I MILLIMETERS (AGLES I DEGREES). 2. THIS LAD PATTER IS FOR REFERECE PURPOSES OLY. COSULT YOUR MAUFACTURIG GROUP TO ESURE YOUR COMPAY'S MAUFACTURIG GUIDELIES ARE MET. 212 Semtech Corporation 6
PROTECTIO PRODUCTS Marking Codes Ordering Information RClamp521P PRELIMIARY PI 1 ID Part umber RClamp521P.TCT RClamp521P.TT Tape Pitch Qty per Reel RailClamp and RClamp are marks of Semtech Corporation. Reel Size 4 3, 7 Inch 2 1, 7 Inch Carrier Tape Specification 3, piece, 4 Pitch Reel Pin 1 Location (Towards Sprocket Holes) Device Orientation in Tape A B K.69 +/-.1 1.19 +/-.1.66 +/-.1 Tape Width B, (Max) D D1 E F P P P2 T W 8 4.2 (.165) 1.5 +.1 -. (.59 +.5 -.).4 ±.25 (.31) 1.75±.1 (.69±.4) 3.5±.5 (.138±.2) 4.±.1 (.157±.- 4) 4.±.1 (.157±.- 4) 2.±.5 (.79±.2).254±.2 (.16) 8. +.3 -.1 (.312±.12) 212 Semtech Corporation 7
PROTECTIO PRODUCTS 1, piece, 2 Pitch Reel RClamp521P PRELIMIARY Bo Ko Ao A B K.69 +/-.1 1.19 +/-.1.66 +/-.1 ote: All dimensions in unless otherwise specified Pin 1 Location (Towards Sprocket Holes) Device Orientation in Tape Contact Information 212 Semtech Corporation Semtech Corporation Protection Products Division 2 Flynn Road, Camarillo, CA 9312 Phone: (85)498-2111 FAX (85)498-384 8