SM712

SM712 DESCRIPTION FEATURES The SM712 transient voltage suppressor (TVS) diode is designed for asymmetrical (12V to -7V) protection in multi-point data transmission standard RS-485 applications. The SM712 may be used to protect devices from transient voltages resulting from electrostatic discharge (ESD), electrical fast transients (EFT), and lightning. The SM712 features 400 Watts (tp=8/20μs) of power handling capability to accommodate the higher transient voltage levels which may be expected in extended common mode applications. This provides higher equipment reliability and eliminates the “guess work” required when using zener diodes that are not rated to handle such transient conditions. The integrated design aids in reducing voltage over-shoot associated with trace inductance. The low clamping voltage of the SM712 minimizes the stress on the protected transceiver. The SOT-23 package allows flexibility in the design of “crowed” circuit boards.  400 watts peak pulse power (tp=8/20μs)  Transient protection for asymmetrical data lines to IEC 61000-4-2 (ESD) ±15kV(air), ±8kV(contact) IEC 61000-4-4 (EFT) 40A (5/50ns) IEC 61000-4-5 (Lightning) 12A (8/20μs)  Protects two +12V to -7V lines  Low capacitance  Low leakage current  Low clamping voltage  Solid-state silicon avalanche technology  RoHS compliant ORDERING INFORMATION APPLICATIONS  Device: SM712  Package: SOT-23  Marking: 712 or C72  Material: Halogen free  Packing: Tape & Reel Quantity per reel: 3,000pcs  Protection of RS-485 transceivers with extended common-mode range  Security systems  Automatic Teller Machines  HFC systems  Networks PIN CONFIGURATION & SCHEMATIC CIRCUIT DIAGRAM www.slkormicro.com MACHANICAL DATA  SOT-23 package  Flammability Rating: UL 94V-0  Terminal: Matte tin plated.  Packaging: Tape and Reel  High temperature soldering guaranteed: 260℃/10s  Reel size: 7 inch 1 SM712 ABSOLUTE MAXIMUM RATING Symbol Parameter Value Units PPP Peak Pulse Power (8/20μs) 400 W IPP Peak Pulse Current (8/20μs) 17 A VESD ESD per IEC 61000-4-2 (Air) ESD per IEC 61000-4-2 (Contact) ±15 ±8 kV TOPT Operating Temperature -55/+150 C TSTG Storage Temperature -55/+150 C ELECTRICAL CHARACTERISTICS (Tamb=25C) Symbol Parameter Pin 1 to 3 and Pin 2 to 3 (12V) TVS Test Condition Min IR Reverse Working Voltage Reverse Breakdown Voltage Reverse Leakage Current VC1 VC2 VRWM VBR CJ1 CJ2 Typ Pin 3 to 1 or Pin 2 to 1 IT = 1mA Max Pin 3 to 1 and Pin 3 to 2 (7V TVS) Min Typ 12 13.3 Units Max 7 7.5 V V VR = VRWM 1 20 μA Clamping Voltage 1 IPP = 5A, tp = 8/20μs 20 12 V Clamping Voltage 2 IPP = 17A, tp = 8/20μs 26 16 V Junction Capacitance 1 Junction Capacitance 2 VR = 0V, f = 1MHz VR = VRWM, f = 1MHz 75 75 pF www.slkormicro.com 45 2 45 pF SM712 ELECTRICAL CHARACTERISTICS CURVE www.slkormicro.com 3 SM712 SOT-23 PACKAGE OUTLINE DIMENSIONS www.slkormicro.com 4