RClamp1624T RailClamp® ESD Protection for uUSB Interfaces PROTECTION PRODUCTS - RailClamp® Description Features Transient protection for high-speed data lines to RailClamp® is a low capacitance TVS array designed to protect high speed data interfaces. This series has been specifically designed to protect sensitive components which are connected to data and transmission lines from overvoltage caused by ESD (electrostatic discharge), CDE (Cable Discharge Events), and EFT (electrical fast transients). The RClamp1624T is specifically designed to protect portable devices that utilize a uUSB port. The unique design of this device features low capacitance TVS diodes for protection of the USB data (DP, DM) and USB ID pins operating up to 5 volts. Loading capacitance on these lines is <1pF for maximum signal integrity. An integrated 12 volt TVS diode is used for protection of the USB voltage bus. This ensures the device will remain in a high-impedance state during normal USB operation or when the battery is being charged. Leakage current of the VBus protection is <50nA when operating at 12 volts. The RClamp1624T is in a 6-pin SLP1710P4T package. It measures 1.7 x 1.0 x 0.40mm. The leads are spaced at a pitch of 0.4mm and are finished with leadfree NiPdAu. They may be used to meet the ESD immunity requirements of IEC 61000-4-2. IEC 61000-4-2 (ESD) ±18kV (air), ±12kV (contact) IEC 61000-4-4 (EFT) 40A (5/50ns) Array of surge rated diodes with internal TVS Diode Small package saves board space Protects USB DP, DM, and ID Pins to 5V Protects USB VBus operating up to 12V Low capacitance (<1pF) on DP, DM, and ID Pins No insertion loss to 2.0GHz Low leakage current Low clamping voltage Innovative flow-through design allows easy pcb layout Solid-state silicon-avalanche technology Mechanical Characteristics SLP1710P4T 6L package Pb-Free, Halogen Free, RoHS/WEEE Compliant Nominal Dimensions: 1.7 x 1.0 x 0.40 mm Lead Finish: NiPdAu Molding compound flammability rating: UL 94V-0 Marking : Marking code + date code Packaging : Tape and Reel Applications USB 2.0 USB OTG Micro USB Circuit Diagram PIN Configuration VBus 1 GND DM 2 3 4 5V DP 12V GND ID 5, 6 SLP (Top View) Revision 3/9/2011 1 www.semtech.com RClamp1624T PROTECTION PRODUCTS Absolute Maximum Rating R ating Symbol Value Units Peak Pulse Power (tp = 8/20μs) Pp k 75 Watts Peak Pulse Current (tp = 8/20μs) IP P 5 A ESD per IEC 61000-4-2 (Air) ESD per IEC 61000-4-2 (Contact) VESD ±18 ±12 kV TJ -55 to +125 °C TSTG -55 to +150 °C Peak Pulse Power (tp = 8/20μs) Pp k 125 Watts Peak Pulse Current (tp = 8/20μs) IP P 5 A ESD per IEC 61000-4-2 (Air) ESD per IEC 61000-4-2 (Contact) VESD ±18 ±12 kV TJ -55 to +125 °C TSTG -55 to +150 °C D P, D M , U S B I D ( P i n s 2 , 3 , 4 ) Operating Temperature Storage Temperature V B u s ( P i n 1) Operating Temperature Storage Temperature © 2011 Semtech Corp. 2 www.semtech.com RClamp1624T PROTECTION PRODUCTS Electrical Characteristics (T = 25oC) D M , D P, U S B I D ( P i n s 2 , 3 , 4 ) Parameter Symbol Conditions Reverse Stand-Off Voltage VRWM Pin 2, 3, or 4 to GN D Reverse Breakdown Voltage V BR It = 1mA, Pin 2, 3, or 4 to GN D Reverse Leakage Current IR VRWM = 5.0V, Pin 2, 3, or 4 to GN D Forward Voltage VF If = 15mA Pin 2, 3, or 4 to GN D Clamping Voltage VC Clamping Voltage Junction Capacitance Maximum Units 5 V 8 11 V 0.005 0.100 μA 1.2 V IPP = 1A, tp = 8/20μs Pin 2, 3, or 4 to GN D 12 V VC IPP = 5A, tp = 8/20μs Pin 2, 3, or 4 to GN D 15 V Cj VR = 0V, f = 1MHz, Pin 2, 3, or 4 to GN D 0.80 pF 0.4 pF VR = 0V, f = 1MHz, Between I/O pins © 2011 Semtech Corp. 3 Minimum 6.5 Typical 0.6 0.7 www.semtech.com RClamp1624T PROTECTION PRODUCTS Electrical Characteristics (T = 25oC) V B u s T V S ( P i n 1) Parameter Symbol Conditions Reverse Stand-Off Voltage VRWM Pin 1 to GN D Reverse Breakdown Voltage V BR It = 1mA, Pin 1 to GN D Reverse Leakage Current IR VRWM = 12V Pin 1 to GN D Forward Voltage VF If = 10mA GN D to Pin 1 Clamping Voltage VC Forward Clamping Voltage Junction Capacitance © 2011 Semtech Corp. Maximum Units 12 V 16.5 18 V 0.005 0.05 μA 1.0 V IPP = 5A, tp = 8/20μs Pin 1 to Ground 25 V VFC IPP = 10A, tp = 8/20μs Ground to Pin 1 3 V Cj VR = 0V, f = 1MHz Pin 1 to GN D 75 pF 4 Minimum 15 Typical 0.6 50 www.semtech.com RClamp1624T PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time (Data Lines - Pins 2, 3, 4 to GND) Pulse Waveform 110 10 Waveform Parameters: tr = 8µs td = 20µs 90 80 70 PP 1 Percent of I Peak Pulse Power - P PP (kW) 100 e-t 60 50 40 0.1 td = IPP/2 30 20 10 0 0.01 0.1 1 10 0 100 5 10 Pulse Duration - tp (us) Clamping Voltage vs. Peak Pulse Current (Data Lines - Pins 2, 3, 4 to GND) 20 25 30 Clamping Voltage vs. Peak Pulse Current (VBus - Pin 1 to GND) 30 16 Clamping Voltage - VC (V) 14 Clamping Voltage - VC (V) 15 Time (µs) 12 10 8 6 Waveform Parameters: tr = 8µs td = 20µs 4 2 25 20 15 10 Waveform Parameters: tr = 8µs td = 20µs 5 0 0 0 1 2 3 4 Peak Pulse Current - IPP (A) 5 0 6 Normalized Capacitance vs. Reverse Voltage (Data Lines - Pins 2, 3, 4 to GND) 1 2 3 4 5 Peak Pulse Current - IPP (A) 6 7 USB 2.0 Eye Pattern with RClamp1624T (Data Lines - Pin 2 and 3) 2 f = 1MHz 1.8 1.6 CJ(VR) / CJ(VR=0) 1.4 1.2 1 0.8 0.6 0.4 0.2 0 0 1 © 2011 Semtech Corp. 2 3 Reverse Voltage - VR (V) 4 5 5 www.semtech.com RClamp1624T PROTECTION PRODUCTS Typical Characteristics Insertion Loss S21 (Data Lines - Pins 2, 3, 4 to GND) Analog Crosstalk CH1 S21 CH1 S21 LOG LOG 20 dB /REF 0 dB 6 dB / REF 0 dB 1: -0.1508 dB 800 MHz 5 0 dB 12 3 2: -0.1454 dB 900 MHz 4 -6 dB 3: -0.2975 dB 1.8 GHz -12 dB 4: -0.8588 dB 2.5 GHz -18 dB -24 dB -30 dB -36 dB 1 MHz 10 MHz 100 MHz START . 030 MHz 3 1 GHz GHz STOP 3000. 000000 MHz START . 030 MHz ESD Clamping (Pins 2, 3, 4 to GND) (8kV Contact per IEC 61000-4-2) ESD Clamping (Pin 1 to GND) (8kV Contact per IEC 61000-4-2) Note: Data is taken with a 10x attenuator © 2011 Semtech Corp. STOP 3000. 000000 MHz Note: Data is taken with a 10x attenuator 6 www.semtech.com RClamp1624T PROTECTION PRODUCTS Applications Information Figure 1- Pin Configuration Device Connection and Layout Options for Protecting One USB Port The RClamp1624T is optimized for protection of USB ports. Low capacitance protection is provided for the USB data (DM, DP) and USB ID pins. The maximum capacitance on these lines is <1pF for maximum signal integrity. USB Data and ID lines are connected at pins 2, 3, and 4. These inputs are referenced to an internal 5 volt TVS protection device. When the voltage on these lines exceed 5 volts, the TVS will conduct. Pin 1 is connected to the USB voltage bus (VBus). This device will conduct when the voltage on the bus exceeds 12 volts. Ground is provided at pins 5 and 6. Note that it is not necessary to connect both ground pins of the device as both are connected internally. Multiple micro vias connected to ground are recommended for best ESD performance. This will reduce parasitic inductance in the ground path and minimize the clamping voltage seen by the protected device. The package is designed for easy trace routing as shown in Figure 2. In this example, the VBus pin is connected to the voltage layer of the PCB with a micro via. Connection to ground is made at pin 6 using two micro vias. Connection to the ID pin is shown, however if the application does not utilize the ID function, pin 4 can be left not connected. © 2011 Semtech Corp. VBus GND DM DP ID GND Figure 2 - Layout Example 7 www.semtech.com RClamp1624T PROTECTION PRODUCTS Applications Information - Spice Model VBus D2 D4 D3 I/O D1 Spice Model R Clamp1624T Spice Parameters Parameter Unit D1 D2 D3 D4 IS Amp 1E-20 1E-20 2E-12 7.38E-15 BV Volt 100 100 8.2 16.4 VJ Volt 0.83 0.83 0.6 0.73 RS Ohm 1.5 0.6 0.2 0.735 IB V Amp 1E-3 1E-3 1E-3 1E-3 CJO Farad 0.25E-12 0.25E-12 56E-12 51E-12 TT sec 2.541E-9 2.541E-9 2.541E-9 2.541E-9 M -- 0.01 0.01 0.23 0.30 N -- 1.1 1.1 1.1 1.1 EG eV 1.11 1.11 1.11 1.11 © 2011 Semtech Corp. 8 www.semtech.com RClamp1624T PROTECTION PRODUCTS Outline Drawing - SLP1710P4T A B D DIMENSIONS MILLIMETERS MIN NOM MAX DIM PIN 1 INDICATOR (LASER MARK) E A SEATING PLANE aaa C C A1 A2 e A A1 A2 b D E e e1 L L1 N aaa bbb 0.37 0.40 0.43 0.00 0.02 0.05 (0.13) 0.15 0.20 0.25 1.65 1.70 1.78 0.95 1.00 1.08 0.40 BSC 1.00 BSC 0.20 0.25 0.30 0.45 0.50 0.55 4 0.08 0.10 e/2 1 N LxN E/2 L1x2 e1/2 e1 bx6 bbb D/2 C A B NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS THE TERMINALS. Land Pattern - SLP1710P4T P1 P1/2 DIMENSIONS DIM C G P P1 X Y Y1 Z Y1 Z (C) G Y P/2 P X MILLIMETERS (0.825) 0.25 0.40 1.00 0.20 0.45 0.70 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. © 2011 Semtech Corp. 9 www.semtech.com RClamp1624T PROTECTION PRODUCTS Marking Ordering Information 1624T YYWW Part Number Lead Finish Qty per Reel R eel Size RClamp 1624T.TCT Pb Free 3,000 7 Inch RailClamp and RClamp are marks of Semtech Corporation YYWW = Date Code Tape and Reel Specification Pin 1 Location User Direction of feed Device Orientation in Tape Pin 1 in upper left towards sprocket holes A0 1.18 +/-0.05 mm B0 K0 1.88 +/-0.05 mm Tap e Width B, (Max) D 8 mm 4.2 mm 1.5 + 0.1 mm - 0.0 mm ) 0.53 +/-0.05 mm D1 E 0.5 mm ±0.05 1.750±.10 mm F K (MAX) P P0 P2 T(MAX) 3.5±0.05 mm 2.4 mm 4.0±0.1 mm 4.0±0.1 mm 2.0±0.05 mm 0.4 mm W 8.0 mm + 0.3 mm - 0.1 mm Contact Information Semtech Corporation Protection Products Division 200 Flynn Rd., Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 © 2011 Semtech Corp. 10 www.semtech.com