-Line Bi-directional TVS Diode Description The ST56D4 is a bi-directional TVS diode, utilizing leading monolithic silicon technology to provide fast response time and low ESD clamping voltage, making this device an ideal solution for protecting voltage sensitive high-speed data lines. The ST56D4 complies with the IEC 6-4-2 (ESD) standard with ±5kV air and ±8kV contact discharge. It is assembled into an ultra-small.x.6x.5mm lead-free DFN package. The small size, ultra-low capacitance and high ESD surge protection make ST56D4 an ideal choice to protect cell phone, digital video interfaces. Mechanical Characteristics Package: DFN6-2 Lead Finish: NiPdAu Case Material: Green Molding Compound. UL Flammability Classification Rating 94V- Moisture Sensitivity: Level 3 per J-STD-2 Terminal Connections: See Diagram Below Marking Information: See Below Features Ultra small package:.x.6x.5mm Low leakage: na level Low operating voltage: 5V Low clamping voltage 2-pin leadless package Complies with following standards: IEC 6-4-2 (ESD) immunity test Air discharge: ±3kV Contact discharge: ±3kV IEC6-4-4 (EFT) 4A (5/5ns) IEC6-4-5 (Lightning) 7A (8/2µs) RoHS Compliant Applications Personal Digital Assistants Peripherals Audio Players Notebooks and Handhelds Portable Instrumentation Keypads, Side Keys, LCD Displays Ordering Information Part Number Packaging Reel Size ST56D4 /Tape & Reel 7 inch Dimensions Schematic and PIN Configuration 2 Maximum Dimensions (mm) DFN6-2 (Bottom View) of 5 www.sursemi.com
Absolute Maximum Ratings (TA=25 C unless otherwise specified) Parameter Symbol Value Unit Peak Pulse Power (8/2µs) Ppk 5 W Peak Pulse Current (8/2µs) IPP 7 A ESD per IEC 6 4 2 (Air) ±3 VESD ESD per IEC 6 4 2 (Contact) ±3 kv Operating Temperature Range TJ 55 to +25 C Storage Temperature Range Tstg 55 to +5 C Electrical Characteristics (TA=25 C unless otherwise specified) Parameter Symbol Min Typ Max Unit Test Condition Reverse Working Voltage VRWM 5 V Breakdown Voltage VBR 6 8 9 V IT = ma Reverse Leakage Current I R.5 ua VRWM = 5V Clamping Voltage VC 8 V IPP = A (8 x 2µs pulse) Clamping Voltage VC 5 V IPP = 7A (8 x 2µs pulse) Junction Capacitance CJ 5 pf VR = V, f = MHz 2 of 5 www.sursemi.com
Typical Performance Characteristics (TA=25 C unless otherwise specified) Junction Capacitance_Cj(pF) 9 8 7 6 5 4 3 2 5 2 3 4 5 Reverse Voltage_VR(V) Junction Capacitance vs. Reverse Voltage Peak Power_Ppp(W)... Pulse Duration_tp(uS) Peak Pulse Power vs. Pulse Time 2 Clamping Voltage_Vc (V) 2 9 6 3 % of Rated Power 8 6 4 2 2 3 4 5 6 7 8 Peak Pulse Current_Ipp (A) 25 5 75 25 5 Ambient Temperature_Ta( ) Clamping Voltage vs. Peak Pulse Current (tp = 8/2us) 9 Peak Pulse Current (Ipp) % of Peak Pulse Current 8 7 6 Ipp/2 5 4 3 2 2 4 6 8 Time_t(uS) 8 X 2uS Pulse Waveform Power Derating Curve ESD Clamping Voltage 8 kv Contact per IEC6 4 2 3 of 5 www.sursemi.com
Applications Information Device Connection Options These low capacitance TVS diodes are designed to provide common mode protection for one high-speed line or differential protect tion for one line pair. The device is bidirectional and may be used on lines where the signal polarity is positive and negative. Circuit Board Layout Recommendations for Suppression of ESD Good circuit board layout is critical for the suppression of ESD induced transients. The following guidelines are recommended: Place the TVS near the input terminals or connectors to restrict transient coupling. Minimize the path length between the TVS and the protected line. Minimize all conductive loops including power and ground loops. The ESD transient return path to ground should be kept as short as possible. Never run critical signals near board edges. Use ground planes whenever possible. Equivalent Circuit Diagram 4 of 5 www.sursemi.com
DFN6-2 Package Outline Drawing SYM DIMENSIONS MILLIMETERS INCHES MIN NOM MAX MIN NOM MAX A.45.5.55.8.2.22 A..2.5...2 b.45.5.55.8.2.22 c.2.5.8.5.6.7 D.95..5.37.39.4 e.65 BSC.26 BSC E.55.6.65.22.24.26 L.2.25.3.8..2 h.7.2.7.3.5.7 Suggested Land Pattern SYM MILLIMETERS DIMENSIONS INCHES X.6.24 Y.5.2 Y2.3.2 Y3.8.32 Z.3.52 Contact Information Sursemi Company Limited 396 Arbor Court, Simi Valley, CA 9365 Phone: (85) 42-326 Email: sales@sursemi.com Sursemi Co., Ltd. reserves the right to make changes to the product specification and data in this document without notice. Sursemi makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Sursemi assume any liability arising from the application or use of any products or circuits, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. 5 of 5 www.sursemi.com