RClamp0522P RClamp0524P

Transcription

1 PROTECTION PRODUCTS - RailClamp Description 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 RClamp TM 0522P and RClamp TM 0524P have a typical capacitance of only 0.0pF between I/O pins. This allows it to be used on circuits operating in excess of GHz without signal attenuation. They may be used to meet the ESD immunity requirements of IEC , Level 4 (±5kV air, ±8kV contact discharge). The is designed to protect two lines, while the will protect four lines. The is in a 6-pin, RoHS/WEEE compliant, SLP60P4 package. It measures.6 x.0 with a nominal height of 0.58mm. The is in a 0-pin, RoHS/WEEE compliant, SLP250P8 package. It measures 2.5 x.0 with a nominal height of 0.58mm. The leads are spaced at a pitch of 0.5mm and are finished with lead-free NiPdAu. They are designed for easy PCB layout by allowing the traces to run straight through the device. The combination of small size, low capacitance, and high level of ESD protection makes them a flexible solution for applications such as HDMI, DisplayPort TM, MDDI, and esata interfaces. Circuit Diagram - Ultra Low Capacitance TVS Arrays Features ESD protection for high-speed data lines to IEC (ESD) ±5kV (air), ±8kV (contact) IEC (Lightning) 5A (8/20μs) IEC (EFT) 40A (5/50ns) Package design optimized for high speed lines Flow-Through design Protects two or four I/O lines Low capacitance: 0.pF typical (I/O to I/O) Low clamping voltage Low operating voltage: 5V Solid-state silicon-avalanche technology Mechanical Characteristics SLP60P4 6-pin package (.6 x.0 x 0.58mm) SLP250P8 0-pin package (2.5 x.0 x 0.58mm) RoHS/WEEE Compliant Lead Pitch: 0.5mm Lead finish: NiPdAu Marking: Marking Code Packaging: Tape and Reel Applications High Definition Multi-Media Interface (HDMI) Digital Visual Interface (DVI) DisplayPort TM Interface MDDI Ports PCI Express esata Interfaces Circuit Diagram - Pin Pin 2 Pin Pin 2 Pin 4 Pin 5, 4, 8 Revision 0// Line Protection 4-Line Protection

2 PROTECTION PRODUCTS - RailClamp Pin Identification and Configuration Ultra Low Capacitance TVS Arrays Pin Identification Pin Identification - 2 Input Lines, 2, 4, 5 Input Lines 5-6 Output Lines (No Internal Connection) 6, 7, 9, 0 Output Lines (No Internal Connection) - 4 Ground, 8 Ground SLP60P4 Pin Configuration (Top View) SLP250P8 Pin Configuration (Top View) Pin Pin 2 Pin Pin 2 Pin 4 Pin 5, 4, 8 Circuit Diagram Circuit Diagram Ordering Information Part Number Number of Lines Qty per Reel Reel Size.TCT Inch.TCT Inch Note: Lead finish is lead-free NiPdAu. RailClamp and RClamp are marks of Semtech Corporation. 2

3 PROTECTION PRODUCTS Absolute Maximum Rating Rating Symbol Value Units Peak Peak Pulse Power (tp = 8/20μs) Pulse Current (tp = 8/20μs) ESD per IEC (Air) ESD per IEC (Contact) P pk 50 Watts I PP 5 A V ESD +/- 7 +/- 2 kv Operating Temperature T J -55 to +25 C Storage Temperature T STG 55 to C Electrical Characteristics (T=25 o C) Parameter Symbol Conditions Minimum Typical Maximum Units Reverse Stand-Off Voltage V RWM Any I/O pin to ground 5 V Reverse Breakdown Voltage V R B I t = ma Any I/O pin to ground 6 V Reverse Leakage Current I R V RWM = 5V, T=25 C Any I/O pin to ground Clamping Voltage V C I PP = A, tp = 8/20μs Any I/O pin to ground Junction Capacitance C j V R = 0V, f = MHz Between I/O pins Junction Capacitance C j V R = 0V, f = MHz Any I/O pin to ground μa 5 V pf 0.8 pf 2008 Semtech Corp.

4 PROTECTION PRODUCTS Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve Peak Pulse Power - P PP (kw) Pulse Duration - tp (us) % of Rated Power or IPP Ambient Temperature - T A ( o C) Pulse Waveform Clamping Voltage vs. Peak Pulse Current Percent of I PP e -t td = I PP /2 Waveform Parameters: tr = 8µs td = 20µs Clamping Voltage -V C (V) Line to Line Line to Gnd Waveform Parameters: tr = 8µs td = 20µs Time (µs) Peak Pulse Current - I PP (A) Normalized Capacitance vs. Reverse Voltage Insertion Loss S2 - I/O to GND C J (V R ) / C J (V R =0) f = MHz 0 db -6 db -2 db -8 db -24 db -0 db -6 db CH S2 LOG 6 db / REF 0 db 2 : db 900 MHz 2: db.8 GHz : db 2.5 GHz Reverse Voltage - V R (V) -42 db -48 db MHz 0 MHz 00 MHz GHz GHz START. 00 MHz STOP MHz 2008 Semtech Corp. 4

5 PROTECTION PRODUCTS Typical Characteristics (Con t) Insertion Loss S2 - I/O to I/O CH S2 LOG 6 db / REF 0 db : db 900 MHz 0 db -6 db -2 db 2 2: db.8 GHz : db 2.5 GHz -8 db -24 db -0 db -6 db -42 db -48 db MHz 0 MHz 00 MHz GHz GHz START. 00 MHz STOP MHz 2008 Semtech Corp. 5

6 PROTECTION PRODUCTS Applications Information Design Recommendations for HDMI Protection Adding external ESD protection to HDMI ports can be challenging. First, ESD protection devices have an inherent junction capacitance. Furthermore, adding even a small amount of capacitance will cause the impedance of the differential pair to drop. Second, large packages and land pattern requirements cause discontinuities that adversely affect signal integrity. The and are specifically designed for protection of high-speed interfaces such as HDMI. They present <0.4pF capacitance between the pairs while being rated to handle >±8kV ESD contact discharges (>±5kV air discharge) as outlined in IEC Each device is in a leadless SLP package that is less than.mm wide. They are designed such that the traces flow straight through the device. The narrow package and flow-through design reduces discontinuities and minimizes impact on signal integrity. This becomes even more critical as signal speeds increase. Pin Configuration Figure is an example of how to route the high speed differential traces through the. The solid line represents the PCB trace. The PCB traces are used to connect the pin pairs for each line (pin to pin 0, pin 2 to pin 9, pin 4 to pin 7, pin 5 to pin 6). For example, line enters at pin and exits at Pin 0 and the PCB trace connects pin and 0 together. This is true for lines connected at pins 2, 4, and 5 also. Ground is connected at pins and 8. One large ground pad should be used in lieu of two separate pads. The same layout rules apply for the. HDMI Connector GND GND GND GND Figure. Flow through Layout Using RClam Clamp052 p0524p TDR Measurements for HDMI The combination of low capacitance, small package, and flow-through design means it is possible to use these devices to meet the HDMI impedance requirements of 00Ohm ±5% without any PCB board modification. Figures and 4 show impedance test results for a TDR risetime of 200ps and 00ps respectively, using a Semtech evaluation board with 00 Ohm traces throughout. Measurements were taken using a TDR method as outlined in the HDMI Compliance Test 2008 Semtech Corp. 6

7 PROTECTION PRODUCTS Applications Information Specification (CTS). In each case, the device meets the HDMI CTS requirement of 00 Ohm ±5% with plenty of margin. For signal integrity purposes, the best results will be obtained by using the to protect the high-speed differential pairs. This is because the device is designed such that the data lines from the connector line up with the I/O pins of the device without altering the trace routing. The RClamp0504P may be used to protect the remaining lines (I2C, CEC, and hot plug). A B Layout Guidelines for Optimum ESD Protection Good circuit board layout is critical not only for signal integrity, but also for effective suppression of ESD induced transients. For optimum ESD protection, the following guidelines are recommended: Place the device as close to the connector as possible. This practice restricts ESD coupling into adjacent traces and reduces parasitic inductance. The ESD transient return path to ground should be kept as short as possible. Whenever possible, use multiple micro vias connected directly from the device ground pad to the ground plane. Avoid running critical signals near board edges. Protecting MDDI Ports with and The small package size and low capacitance of the and make them ideal for high-speed lines in portable applications. One such application is the protection of MDDI ports in cellular phones. MDDI is a serial data interface operating at 480Mb/s per line pair. The lines are scalable for increased speed and display resolution. A MDDI port protection example is shown in Figure 5. The is used to protect two differential line pairs while an is used to protect the MDDI strobe lines. Note that devices are used on both the main board and LCD side of the MDDI port. Devices on the main board are needed to protect the MDDI controller in the Baseband processor and devices on the LCD board to protect MDDI controller in LCD module. A single line TVS such as the uclamp050p is used to protect the MDDI power line. The protection devices should be placed close to the connector of each board. Traces are routed directly through each device, minimizing parasitic inductance. Connections to the ground plane should be made with multiple micro vias when possible. A B X-axis (nsec) Y-axis (Ohm) Figure 2 - TDR Measurement with 200ps risetime using Semtech Evaluation Board A B X-axis (nsec) Y-axis (Ohm) Figure - TDR Measurement with 00ps risetime using Semtech Evaluation Board Note: Measurements were taken on SLP HDMI EVAL Rev C Board that has 00Ω differential traces impedance throughout (No trace Compensation) Semtech Corp. 7 B A

8 PROTECTION PRODUCTS Applications Information MDDI_Data0+ MDDI_Data0- MDDI Link Controller Gnd MDDI_Data+ MDDI_Data- Gnd MDDI Link Controller MDDI_Stb+ MDDI_Stb- Gnd Gnd Host Pwr HOST uclamp050p Host Gnd uclamp050p Figure 4. MDDI Port Protection 2008 Semtech Corp. 8

9 PROTECTION PRODUCTS Applications Information Spice Model Spice Model Spice Parameters Parameter IS BV VJ RS IBV CJO TT U nit D (LCRD) D 2 (LCRD) D (TVS) Amp E-4 E-4 2E-2 Volt Volt Ohm Farad 0.4E-2 0.4E-2 56E-2 Amp E- E- E- sec 2.54E E E- 9 M N EG ev Semtech Corp. 9

10 PROTECTION PRODUCTS Applications Information Spice Model Spice Model Spice Parameters Parameter IS BV VJ RS IBV CJO TT U nit D (LCRD) D 2 (LCRD) D (TVS) Amp E-4 E-4 2E-2 Volt Volt Ohm Farad 0.4E-2 0.4E-2 56E-2 Amp E- E- E- sec 2.54E E E- 9 M N EG ev Semtech Corp. 0

11 PROTECTION PRODUCTS Outline Drawing - SO-8 SLP60P4 aaa C A PIN INDICATOR (LASER MARK) A2 D A B E A C SEATING PLANE DIMENSIONS INCHES MILLIMETERS DIM MIN NOM MAX MIN NOM MAX A A A2 (.005) (0.) b b D E e.020 BSC 0.50 BSC e.09 BSC.00 BSC L N 4 4 aaa bbb bbb bxn C A B E/2 LxN 2 bxn bbb R0.25 C A B N 2X R0.075 PLACES e e D/2 NOTES:. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). Land Pattern - SLP60P4 P P Z (C) G Y X X (Y) DIMENSIONS DIM INCHES MILLIMETERS C (.04) (0.87) G P P X X Y Y (.06) (.55) Z NOTES:. 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 Semtech Corp.

12 PROTECTION PRODUCTS Outline Drawing - SO-8 SLP250P8 aaa C A2 A PIN INDICATOR (LASER MARK) D A B E A C SEATING PLANE DIMENSIONS INCHES MILLIMETERS DIM MIN NOM MAX MIN NOM MAX A A A (.005) (0.) 0.05 b b D E e.020 BSC 0.50 BSC L N 8 8 aaa bbb R0.25 bxn bbb C A B 2 E/2 LxN N 2X R PLACES e D/2 bxn bbb C A B NOTES:. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). Land Pattern - SLP250P8 P Z (C) X G P X Y (Y) DIMENSIONS DIM INCHES MILLIMETERS C (.04) (0.875) G P P X X Y Y (.06) (.55) Z NOTES:. 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 Semtech Corp. 2

13 PROTECTION PRODUCTS Marking Codes PIN INDICATOR 0522P PIN INDICATOR 0524P Tape and Reel Specification Pin Location User Direction of feed Device Orientation in Tape Part Number A0 B0 K0 RClamp0522T RClamp0524T.0 +/-0.05 mm.75 +/-0.05 mm /-0.05 mm.2 +/-0.05 mm /-0.05 mm /-0.05 mm Tape Width B, (Max) D D E F K (MAX) P P0 P 2 T(MAX) W 8 mm 4.2 mm mm mm ) 0.5 mm ± ±.0 mm.5±0.05 mm 2.4 mm 4.0±0. mm 4.0±0. mm 2.0±0.05 mm 0.4 mm 8.0 mm + 0. mm - 0. mm Contact Information Semtech Corporation Protection Products Division 200 Flynn Road, Camarillo, CA 902 Phone: (805)498-2 FAX (805) Semtech Corp.