RClamp2451ZA Ultra Small RailClamp® 1-Line, 24V ESD Protection PROTECTION PRODUCTS - RailClamp® Description Features High ESD withstand Voltage: +/-14kV (Contact) and RailClamp TVS diodes are ultra low capacitance devices designed to protect sensitive electronics from damage or latch-up due to ESD, EFT, and EOS. They are designed for use on high speed ports in applications such as cell phones, notebook computers, and other portable electronics. These devices offer desirable characteristics for board level protection including fast response time, low operating and clamping voltage, and no device degradation. RClamp®2451ZA is specifically designed for protection of Near Field Communications (NFC) interfaces. It features extremely good ESD protection characteristics including a low typical dynamic resistance of 0.16 Ohms (typical), low peak ESD clamping voltage, and high ESD withstand voltage (+/-14kV contact per IEC 61000-4-2). Low typical capacitance (0.35pF at VR=0V) means that RClamp2451ZA will not create harmonic distortion in the RF signal. This device is bidirectional and has a working voltage of 24V for use on NFC resonator circuits without signal clipping. RClamp2451ZA is in a 2-pin SLP0603P2X3F package measuring 0.6 x 0.3 mm with a nominal height of 0.25mm. Leads are finished with lead-free NiAu. The combination of working voltage, low dynamic resistance, and low capacitance makes this device ideal for use on NFC antenna ciruits, RF signal lines, and FM antennas in portable devices. ® +/- 18kV (Air) per IEC 61000-4-2 Able to withstand over 1000 ESD strikes per IEC 61000-4-2 Level 4 1 pack age Ultra-small 020 0201 package Protects one high speed data line Working voltage: +/- 24V Low capacitance: 0.35pF typical Low dynamic resistance: 0.16 Ohms (Typ) Low ESD clamping voltage Solid-state silicon-avalanche technology Mechanical Characteristics SLP0603P2X3F Package Pb-Free, Halogen Free, RoHS/WEEE Compliant Nominal Dimensions: 0.6 x 0.3 x 0.25 mm Lead Finish: NiAu Marking: Marking Code Packaging: Tape and Reel Applications Near Field Communication (NFC) lines RF signal lines FM Antenna Nominal Dimensions Schematic 0.600 0.220 1 0.300 0.160 0.355 BSC 2 0.250 SLP0603P2X3F (Bottom View) Nominal Dimensions (in mm) Revision 10/23/2014 1 www.semtech.com RClamp2451ZA PROTECTION PRODUCTS Absolute Maximum Rating R ating Symbol Value Units Peak Pulse Power (tp = 8/20μs) Pp k 60 Watts Maximum Peak Pulse Current (tp = 8/20μs) Ip p 3 Amps VESD +/- 18 +/- 14 kV TJ -40 to +85 °C TSTG -55 to +150 °C ESD per IEC 61000-4-2 (Air)1 ESD per IEC 61000-4-2 (Contact)1 Operating Temperature Storage Temperature Electrical Characteristics (T=25oC) Parameter Symbol Conditions Reverse Stand-Off Voltage VRWM Pin 1 to 2 or 2 to 1 Breakdown Voltage V BR IBR = 10μA Reverse Leakage Current IR ESD Clamping Voltage2 Minimum Maximum Units 24 V 27.5 31 V VRWM = 24V, T=25°C Pin 1 to 2 or 2 to 1 <1 50 nA VC IPP = 4A, tlp = 0.2/100ns 5 V ESD Clamping Voltage2 VC IPP = 16A, tlp = 0.2/100ns 7 V Dynamic Resistance2, 3 RD tp = 0.2/100ns 0.16 Ohms Junction Capacitance Cj VR = 0V, f = 1MHz 0.35 25.5 Typical 0.45 pF Notes 1)ESD gun return path connected to ESD ground reference plane. 2)Transmission Line Pulse Test (TLP) Settings: tp = 100ns, tr = 0.2ns, ITLP and VTLP averaging window: t1 = 70ns to t2 = 90ns. 3) Dynamic resistance calculated from ITLP = 4A to ITLP = 16A © 2014 Semtech Corporation 2 www.semtech.com RClamp2451ZA PROTECTION PRODUCTS Typical Characteristics ESD Clamping (-8kV Contact per IEC 61000-4-2) ESD Clamping (+8kV Contact per IEC 61000-4-2) 100 20 Measured with 50 Ohm scope input impedance, 2GHz bandwidth. Corrected for 50 Ohm, 20dB attenuator. ESD gun return path connected to ESD ground plane. 0 Clamping Voltage - VC (V) Clamping Voltage - VC (V) 80 60 40 20 -20 -40 -60 Measured with 50 Ohm scope input impedance, 2GHz bandwidth. Corrected for 50 Ohm, 20dB attenuator. ESD gun return path connected to ESD ground plane. -80 0 -100 -20 -10 0 10 20 30 40 50 60 70 -10 80 0 10 20 Time (ns) TLP Characteristic (Positive) 50 60 70 80 TLP Characteristic (Negative) 30 5 Transmission Line Pulse Test (TLP) Settings: tp = 100ns, tr = 0.2ns, ITLP and VTLP averaging window: t1 = 70ns to t2 = 90ns 25 0 -5 TLP Current (A) 20 TLP Current (A) 30 40 Time (ns) 15 10 -10 -15 5 -20 0 -25 -5 Transmission Line Pulse Test (TLP) Settings: tp = 100ns, tr = 0.2ns, ITLP and VTLP averaging window: t1 = 70ns to t2 = 90ns -30 0 5 10 15 20 25 30 -30 -25 -20 -15 -10 -5 0 Clamping Voltage (V) Clamping Voltage (V) Junction Capacitance vs. Reverse Voltage Typical Insertion Loss (S21) 0.0 0.5 ‐0.5 ‐1.0 Loss (dB) Junction Capacitance - CJ (pF) 0.4 0.3 0.2 ‐1.5 ‐2.0 ‐2.5 ‐3.0 0.1 ‐3.5 f = 1MHz ‐4.0 0.0 0 5 10 15 0.01 20 Voltage (V) © 2014 Semtech Corporation 0.1 1 10 Frequency (GHz) 3 www.semtech.com RClamp2451ZA PROTECTION PRODUCTS Applications Information ESD Protection of NFC Interfaces The Near Field Communication (NFC) antenna is usually connected to the NFC controller IC via contact points on the phone. These contact points are user accessable and therefore may be subjected to ESD strikes. External protection (TVS) devices should be placed between the antenna and the NFC chip interface. The working voltage of the TVS should be high enough as not to clip the NFC signal. Additionally, the capacitance of the device should be minimized in order to avoid harmonic distortion of the RF signal. RClamp2451ZA meets these requirements and also features extremely low dynamic resistance (<0.1 Ohms) resulting in low ESD clamping voltage. The low dynamic resistance also helps insure protection for Schottky diodes that may be used in the NFC circuit. RClamp2451ZA is designed to work on NFC circuits with AC signals as high as 24V. An example protection ciruit using RClamp2451ZA is shown below in Figure 1. RX+ RX- TX+ EMI Filter Ckt Antenna Matching Ckt Antenna+ RClamp2451ZA GND NFC Controller RClamp2451ZA TX- EMI Filter Ckt Antenna Matching Ckt Antenna - REC C R Figure 1 - NFC Protection Example © 2014 Semtech Corporation 4 www.semtech.com RClamp2451ZA PROTECTION PRODUCTS Applications Information Assembly Guidelines The small size of this device means that some care must be taken during the mounting process to insure reliable solder joints. The figure at the right details Semtech’s recommended aperture based on the assembly guidelines detailed in the table below. Note that these are only recommendations and should serve only as a starting point for design since there are many factors that affect the assembly process. Exact manufacturing parameters will require some experimentation to get the desired solder application. 0.273 0.205 0.220 Assembly Parameter R ecommendation Solder Stencil Design Laser cut, Electro-polished Aper ture shape Rectangular with rounded corners Solder Stencil Thickness 0.320 Land Pad Stencil opening 0.100 mm (0.004") Component Solder Paste Type Solder Reflow Profile PCB Solder Pad Design PCB Pad Finish © 2014 Semtech Corporation Type 4 size sphere or smaller Recommended Mounting Pattern Per JEDEC J-STD-020 N on-Solder mask defined OSP OR N iAu 5 www.semtech.com RClamp2451ZA PROTECTION PRODUCTS Outline Drawing - SLP0603P2X3F A B D DIM A A1 b D E e L N aaa bbb E TOP VIEW DIMENSIONS MILLIMETERS MIN NOM MAX 0.235 0.250 0.265 0.000 0.010 0.050 0.200 0.220 0.240 0.580 0.600 0.620 0.280 0.300 0.320 0.355 BSC 0.140 0.160 0.180 2 0.08 0.10 A SEATING PLANE aaa C C A1 e/2 R0.025 TYP bxN C A B bbb 2X L e BOTTOM VIEW NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS(ANGLES IN DEGREES). Land Pattern - SLP0603P2X3F DIMENSIONS (C) Z G DIM C G X Y Z MILLIMETERS (0.385) 0.181 0.273 0.205 0.590 Y 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 . © 2014 Semtech Corporation 6 www.semtech.com RClamp2451ZA PROTECTION PRODUCTS Marking Code Ordering Information e Part Number Qty per Reel Pocket Pitch Reel Size RClamp2451ZATFT 15,000 2mm 7 Inch Notes: RailClamp and RClamp are trademarks of Semtech Corporation Note: Device is electrically symmetrical Carrier Tape Specification e e e Device Orientation in Tape © 2014 Semtech Corporation 7 www.semtech.com RClamp2451ZA PROTECTION PRODUCTS Contact Information Semtech Corporation Protection Products Division 200 Flynn Rd., Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 © 2014 Semtech Corporation 8 www.semtech.com