CS0809V

CS0809V Low Capacitance TVS Protection Features Applications • Transient protection for high-speed data lines IEC 61000-4-2 (ESD) ±15kV (Air) ±8kV (Contact) IEC 61000-4-4 (EFT) 40A (5/50 ns) Cable Discharge Event (CDE) • • Package optimized for high-speed lines Small package (2.9mm × 2.8mm × 1.4mm) • • • • • • • • • • • • Protects four data lines Low capacitance: 3.5pF Typical @ 0V Low leakage current: 0.1µA @ VRWM (Typical) Low clamping voltage Each I/O pin can withstand over 1000 ESD strikes for ±8kV contact discharge General Description CS0809V is a low-capacitance Transient Voltage Suppressor (TVS) designed to provide electrostatic discharge (ESD) protection for high-speed data interfaces. With typical capacitance of 3.5pF only, CS0809V is designed to protect parasitic-sensitive systems against over-voltage and over-current transient events. It complies with IEC 61000-4-2 (ESD), Level 4 (±15kV air, ±8kV contact discharge), IEC 61000-4-4 (electrical fast transient - EFT) (40A, 5/50 ns), very fast charged device model (CDM) ESD and cable discharge event (CDE), etc. CS0809V uses small SOT23-6L package. Each CS0809V device can protect four high-speed data lines. The combined features of low capacitance, small size and high ESD robustness make CS0809V ideal for high-speed data ports and high-frequency lines (e.g., USB2.0) applications. The low clamping voltage of the CS0809V guarantees a minimum stress on the protected IC. CS0809V Rev.0.9 USB2.0 Power and Data Line Protection Digital Visual Interfaces (DVI) 10/100/1000M Ethernet Interfaces Desktops, Servers and Notebooks SIM Ports Monitors and Flat Panel Displays Video Graphics Cards Mechanical Characteristics • • • • • SOT23-6L package MSL-3 level Flammability Rating: UL 94V-0 Marking: Part number, Date Packaging: Tape and Reel Circuit Diagram Pin Configuration SOT23-6L (Top View) Silergy Corp. Confidential- Prepared for Customer Use Only 1 CS0809V Low Capacitance TVS Protection Absolute Maximum Rating Symbol Parameter Value Units IPP Peak Pulse Current (8/20µs) 17 A PPK Peak Pulse Power (8/20µs) 350 Watts VESD ESD per IEC 61000-4-2 (Air) ESD per IEC 61000-4-2 (Contact) ±30 ±30 kV TOPT Operating Temperature -55/+125 °C TSTG Storage Temperature -55/+150 °C Electrical Characteristics (T = 25°° C) Symbol Parameter VRWM Nominal Reverse Working Voltage IR Reverse Leakage Current @ VRWM VBR Reverse Breakdown Voltage @ IT IT Test Current for Reverse Breakdown VC Clamping Voltage @ IPP IPP Maximum Peak Pulse Current CESD VR Parasitic Capacitance Reverse Voltage f Small Signal Frequency IF Forward Current VF Forward Voltage @ IF Symbol Uni-Directional TVS Test Condition Minimum Typical Maximum Units 5.0 V 0.1 1.0 µA 7.0 9.0 V 1.2 V 12 V 17 V 3.5 5.0 pF 1.5 2.5 pF VRWM VBR VRWM = 5V, T = 25° C Between I/O and GND IT = 1mA Between I/O and GND VF IF = 15mA IR VC VC CESD CESD CS0809V Rev.0.9 IPP = 1A, tp = 8/20µs Between I/O and GND IPP = 5A, tp = 8/20µs Between I/O and GND VR = 0V, f = 1MHz Between I/O and GND VR = 0V, f = 1MHz Between I/O and I/O 6.0 Silergy Corp. Confidential- Prepared for Customer Use Only 2 CS0809V Low Capacitance TVS Protection Voltage Sweeping of I/O to GND Insertion Loss S21 of I/O to GND 0.12 5.0 0.10 0.0 0.08 0.06 -5.0 Insertion Loss (dB) Current (A) 0.04 0.02 0.00 -0.02 -0.04 -10.0 -15.0 -20.0 -0.06 -0.08 -25.0 -0.10 -30.0 -0.12 -2 -1 0 1 2 3 4 5 6 7 8 1.0E+06 9 1.0E+07 1.0E+08 1.0E+09 Frequency (Hz) Voltage (V) Capacitance vs. Voltage of I/O to GND (f = 1MHz) Capacitance vs. Reverse Voltage Normalized Capacitance vs. Reverse Voltage 1.5 5.5 1.4 5.0 1.3 Normalized Capacitance 6.0 Capacitance (pF) 4.5 4.0 3.5 3.0 2.5 1.2 1.1 1.0 0.9 0.8 2.0 0.7 1.5 0.6 0.5 1.0 0 1 2 3 4 5 0 1 2 Reverse Voltage (V) 5 ESD Clamping of I/O to GND (-8kV Contact per IEC 61000-4-2) 50.0 20.0 40.0 10.0 Clamping Voltage (V) . 4 Reverse Voltage (V) ESD Clamping of I/O to GND (+8kV Contact per IEC 61000-4-2) 30.0 . Clamping Voltage (V) 3 20.0 10.0 0.0 -10.0 0.0 -10.0 -20.0 -30.0 -40.0 -20.0 -50.0 -50 0 50 100 Time (ns) CS0809V Rev.0.9 150 200 -50 0 50 100 150 200 Time (ns) Silergy Corp. Confidential- Prepared for Customer Use Only 3 CS0809V Low Capacitance TVS Protection Application Information Pin Connection in PCB CS0809V is capable to provide ESD protection for four data lines simultaneously. The pin connection is shown in Figure 1. Four parallel data lines, from inner IC to I/O port connector, could connect to CS0809V four I/O pins directly. Pin 2 of CS0809V is the negative reference pin, which should connect to the GND of PCB; while Pin 5 of CS0809V is the positive reference pin, which should connect to the power supply of PCB. The connection wires should be as short as possible in order to minimize the parasitic inductance. Figure 2 Positive ESD Clamping Voltage Optimization As we all know, the ESD pulse could discharge huge current in a very short time, from 0.2ns to 10 ns. Thus, the VC will exceed the inner circuit capability. However, if with the power clamping circuit in CS0809V, the ESD shunting current will be IESD2, which leading to the clamping voltage VC as: VC = VF , D1 + VBR , Dz + VCC (2) 6 1 5 2 where VBR,Dz is the reverse breakdown voltage of diode DZ, which is much smaller than the induced clamping voltage by parasitic inductance Lp in (1) 4 3 PCB Layout Guidelines For optimum ESD protection and the whole circuit performance, the following PCB layout guidelines are recommended: Figure 1 CS0809V pin connection in PCB • CS0809V GND pin to the PCB GND rail path should be as short as possible. It could reduce the ESD transient return path to GND. • The vias connecting CS0809V VCC & GND pins to the PCB VCC & GND should be wide. • Place CS0809V as close to the connector port as possible. It could reduce the parasitic inductance and restrict ESD coupling into adjacent traces. • Avoid running critical signals near board edges. Clamping Voltage Optimization CS0809V could use its power clamping circuit to limit the TVS clamping voltage (VC) to a suitable value during positive and negative mode ESD stress. Taking positive mode as example shown in Figure 2, if there is no power clamping circuit in CS0809V, the IESD1 will be the ESD shunting current from I/O to VCC via D1 and Lp. The clamping voltage VC at I/O port will be: VC = VF , D1 + Lp dI ESD1 + VCC dt (1) where VF,D1 is the forward turn-on voltage of the steering diode D1, Lp is the parasitic inductance in the ESD current shunting path. CS0809V Rev.0.9 Silergy Corp. Confidential- Prepared for Customer Use Only 4 CS0809V Low Capacitance TVS Protection Application Information (continued) Layout Top View for Dual USB Ports with CS0809V 6 1 5 CS0809V 2 4 3 6 1 5 CS0809V 2 4 3 Layout Top View for Video (VGA) Interface with CS0809V CS0809V Rev.0.9 Silergy Corp. Confidential- Prepared for Customer Use Only 5 CS0809V Low Capacitance TVS Protection Application Information (continued) Layout Top View for SIM Port with CS0809V Layout Top View for Digital Visual Interface (DVI) with CS0809V CS0809V Rev.0.9 Silergy Corp. Confidential- Prepared for Customer Use Only 6 CS0809V Low Capacitance TVS Protection Application Information (continued) Differential Protection for 10M/100M Ethernet Interface with CS0809V 6 5 2 4 3 CS0809V 1 Differential and Common Mode Protection for 10M/100M Ethernet Interface with CS0809V CS0809V Rev.0.9 Silergy Corp. Confidential- Prepared for Customer Use Only 7 CS0809V Low Capacitance TVS Protection Package Outline • • SOT23-6L package MSL-3 level Package Dimensions (Controlling dimensions are in millimeters) Symbol Dimensions (mm) Dimensions (Inches) Minimum Typical Maximum Minimum Typical Maximum A — — 1.450 — — 0.057 A1 0.000 — 0.150 0.000 — 0.006 A2 0.900 1.200 1.300 0.035 0.047 0.012 A3 0.637 0.787 0.837 0.025 0.031 0.033 A4 0.263 0.413 0.463 0.010 0.016 0.018 b 0.300 — 0.500 0.012 — 0.020 b1 0.300 0.400 0.450 0.012 0.016 0.018 c 0.080 — 0.220 0.003 — 0.009 c1 0.080 0.130 0.200 0.003 0.005 0.008 D 2.90 BSC 0.114 BSC e 0.95 BSC 0.037 BSC e1 1.90 BSC 0.075 BSC E 2.80 BSC 0.110 BSC E1 1.60 BSC 0.063 BSC L 0.300 L1 L2 0.600 0.012 0° θ1 5° 8° 0° 10° 15° 5° 4° 8° 10° 15° 0.006 bbb 0.200 0.008 ccc 0.100 0.004 ddd 0.100 0.004 CS0809V Rev.0.9 0.024 0.010 BSC 4° 0.150 0.018 0.024 REF 0.250 BSC θ aaa 0.450 0.600 REF Silergy Corp. Confidential- Prepared for Customer Use Only 8 CS0809V Low Capacitance TVS Protection Tape and Reel Specification Symbol W A0 B0 K0 E F P P0 P2 T Dimensions (mm) 8.00+0.3 -0.1 3.23±0.05 3.17±0.05 1.37±0.05 1.75±0.1 3.5±0.05 4.0±0.1 4.0±0.1 2.0±0.05 0.25±0.02 W1 S K M N R H W Symbol Reel Size M N W W1 H S K R Dimensions (mm) Φ178 178.0±1.0 60.0±1.0 11.5±0.5 9.0±0.5 13.0±0.5 2.0±0.1 11.0±0.2 1.0±0.05 CS0809V Rev.0.9 Silergy Corp. Confidential- Prepared for Customer Use Only 9 CS0809V Low Capacitance TVS Protection Marking Codes Ordering Information Part Number Working Voltage Quantity Per Reel Reel Size CS0809V 5V 3,000 7 Inch Note: (1) “9V” is part number, fixed. (2) “YWW” is date code. “Y” is the assembly year (2011 is “1”); while “WW” is the assembly week in a year. CS0809V Rev.0.9 Silergy Corp. Confidential- Prepared for Customer Use Only 10