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PROTECTION PRODUCTS - RailClamp(R) Description
RailClamp(R) 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.
RailClamp(R) ESD Protection for uUSB Interfaces
Features
Transient protection for high-speed data lines to 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
RCLAMP1624T
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
1
VBus DM
GND
2
3
4 5V 12V
DP ID
SLP (Top View)
GND
5, 6
Revision 3/9/2011
1
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RCLAMP1624T
PROTECTION PRODUCTS Absolute Maximum Rating
R ating D P, D M , U S B I D ( P i n s 2 , 3 , 4 ) Peak Pulse Power (tp = 8/20s) Peak Pulse Current (tp = 8/20s) ESD per IEC 61000-4-2 (Air) ESD per IEC 61000-4-2 (Contact) Operating Temperature Storage Temperature V B u s ( P i n 1) Peak Pulse Power (tp = 8/20s) Peak Pulse Current (tp = 8/20s) ESD per IEC 61000-4-2 (Air) ESD per IEC 61000-4-2 (Contact) Operating Temperature Storage Temperature Pp k IP P VESD TJ TSTG 125 5 18 12 -55 to +125 -55 to +150 Watts A kV C C Pp k IP P VESD TJ TSTG 75 5 18 12 -55 to +125 -55 to +150 Watts A kV C C Symbol Value Units
(c) 2011 Semtech Corp.
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RCLAMP1624T
PROTECTION PRODUCTS Electrical Characteristics (T = 25oC)
D M , D P, U S B I D ( P i n s 2 , 3 , 4 ) Parameter Reverse Stand-Off Voltage Reverse Breakdown Voltage Reverse Leakage Current Forward Voltage Clamping Voltage Clamping Voltage Junction Capacitance Symbol VRWM V BR IR VF VC VC Cj Conditions Pin 2, 3, or 4 to GN D It = 1mA, Pin 2, 3, or 4 to GN D VRWM = 5.0V, Pin 2, 3, or 4 to GN D If = 15mA Pin 2, 3, or 4 to GN D IPP = 1A, tp = 8/20s Pin 2, 3, or 4 to GN D IPP = 5A, tp = 8/20s Pin 2, 3, or 4 to GN D VR = 0V, f = 1MHz, Pin 2, 3, or 4 to GN D VR = 0V, f = 1MHz, Between I/O pins 0.7 0.6 6.5 8 0.005 Minimum Typical Maximum 5 11 0.100 1.2 12 15 0.80 0.4 Units V V A V V V pF pF
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RCLAMP1624T
PROTECTION PRODUCTS Electrical Characteristics (T = 25oC)
V B u s T V S ( P i n 1) Parameter Reverse Stand-Off Voltage Reverse Breakdown Voltage Reverse Leakage Current Forward Voltage Clamping Voltage Forward Clamping Voltage Junction Capacitance Symbol VRWM V BR IR VF VC VFC Cj Conditions Pin 1 to GN D It = 1mA, Pin 1 to GN D VRWM = 12V Pin 1 to GN D If = 10mA GN D to Pin 1 IPP = 5A, tp = 8/20s Pin 1 to Ground IPP = 10A, tp = 8/20s Ground to Pin 1 VR = 0V, f = 1MHz Pin 1 to GN D 50 0.6 15 16.5 0.005 Minimum Typical Maximum 12 18 0.05 1.0 25 3 75 Units V V A V V V pF
(c) 2011 Semtech Corp.
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RCLAMP1624T
PROTECTION PRODUCTS Typical Characteristics
Non-Repetitive Peak Pulse Power vs. Pulse Time (Data Lines - Pins 2, 3, 4 to GND)
10
Pulse Waveform
110 100 90 80 Waveform Parameters: tr = 8s td = 20s e-t
Peak Pulse Power - P PP (kW)
1
70 60 50 40 30 20 10 0
Percent of I
PP
0.1
td = IPP/2
0.01 0.1 1 10 100 Pulse Duration - tp (us)
0
5
10
15 Time (s)
20
25
30
Clamping Voltage vs. Peak Pulse Current (Data Lines - Pins 2, 3, 4 to GND)
16 14 Clamping Voltage - VC (V) 12 10 8 6 4 2 0 0 1 2 3 4 Peak Pulse Current - IPP (A) 5 6 Waveform Parameters: tr = 8s td = 20s Clamping Voltage - VC (V) 30 25 20 15 10 5 0 0
Clamping Voltage vs. Peak Pulse Current (VBus - Pin 1 to GND)
Waveform Parameters: tr = 8s td = 20s
1
2
3 4 5 Peak Pulse Current - IPP (A)
6
7
Normalized Capacitance vs. Reverse Voltage (Data Lines - Pins 2, 3, 4 to GND)
2 f = 1MHz 1.8 1.6 1.4 CJ(VR) / CJ(VR=0) 1.2 1 0.8 0.6 0.4 0.2 0 0 1 2 3 Reverse Voltage - VR (V) 4 5
USB 2.0 Eye Pattern with RCLAMP1624T (Data Lines - Pin 2 and 3)
(c) 2011 Semtech Corp.
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RCLAMP1624T
PROTECTION PRODUCTS Typical Characteristics
Insertion Loss S21 (Data Lines - Pins 2, 3, 4 to GND)
CH1 S21 CH1 S21 LOG 6 dB / REF 0 dB 1: -0.1508 dB 800 MHz
5
Analog Crosstalk
LOG 20 dB / REF 0 dB
0 dB
12 3
2: -0.1454 dB 900 MHz 3: -0.2975 dB 1.8 GHz 4: -0.8588 dB 2.5 GHz
4
-6 dB -12 dB -18 dB -24 dB -30 dB -36 dB
1 MHz START . 030 MHz
10 MHz
100 MHz
3 1 GHz GHz STOP 3000. 000000 MHz START . 030 MHz STOP 3000. 000000 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
Note: Data is taken with a 10x attenuator
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RCLAMP1624T
PROTECTION PRODUCTS Applications Information
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. Figure 1- Pin Configuration
VBus DM DP ID
GND
GND
Figure 2 - Layout Example
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RCLAMP1624T
PROTECTION PRODUCTS Applications Information - Spice Model
VBus D2 I/O D1 D3 D4
Spice Model
R Clamp1624T Spice Parameters Parameter IS BV VJ RS IB V CJO TT M N EG Unit Amp Volt Volt Ohm Amp Farad sec --eV D1 1E-20 100 0.83 1.5 1E-3 0.25E-12 2.541E-9 0.01 1.1 1.11 D2 1E-20 100 0.83 0.6 1E-3 0.25E-12 2.541E-9 0.01 1.1 1.11 D3 2E-12 8.2 0.6 0.2 1E-3 56E-12 2.541E-9 0.23 1.1 1.11 D4 7.38E-15 16.4 0.73 0.735 1E-3 51E-12 2.541E-9 0.30 1.1 1.11
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RCLAMP1624T
PROTECTION PRODUCTS Outline Drawing - SLP1710P4T
A PIN 1 INDICATOR (LASER MARK) D B
DIM
E
DIMENSIONS MILLIMETERS MIN NOM MAX
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
A aaa C A2 e e/2 1 LxN L1x2 e1/2 e1 bx6 D/2 bbb N E/2 A1 C
SEATING PLANE
A A1 A2 b D E e e1 L L1 N aaa bbb
CAB
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 MILLIMETERS (0.825) 0.25 0.40 1.00 0.20 0.45 0.70 1.40
Y1 (C) G Y P/2 P X Z
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.
(c) 2011 Semtech Corp.
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RCLAMP1624T
PROTECTION PRODUCTS Marking Ordering Information
Part Number Lead Finish Pb Free Qty per Reel 3,000 R eel Size 7 Inch
1624T
YYWW
YYWW = Date Code
RClamp 1624T.TCT
RailClamp and RClamp are marks of Semtech Corporation
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 1.88 +/-0.05 mm K0 0.53 +/-0.05 mm
Tap e Width
B, (Max)
D
D1
E
F
K (MAX)
P
P0
P2
T(MAX)
W 8.0 mm + 0.3 mm - 0.1 mm
8 mm
4.2 mm
1.5 + 0.1 mm - 0.0 mm )
0.5 mm 0.05
1.750.10 mm
3.50.05 mm
2.4 mm
4.00.1 mm
4.00.1 mm
2.00.05 mm
0.4 mm
Contact Information
Semtech Corporation Protection Products Division 200 Flynn Rd., Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804
(c) 2011 Semtech Corp. 10 www.semtech.com

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