uClamp2804L Lightning and ESD Protection for Gigabit Ethernet Interfaces PROTECTION PRODUCTS PROTECTION PRODUCTS - MicroClamp Features Description The Clamp 2804L TVS diode is specifically designed High ESD withstand Voltage: +/-30kV (Contact/Air) to meet the performance requirements of Gigabit per IEC 61000-4-2 Ethernet interfaces. They are designed to protect Able to withstand over 1000 ESD strikes per IEC sensitive PHY chips from damage or upset due to 61000-4-2 Level 4 electrostatic discharge (ESD), lightning, electrical fast Flow-through design simplifies layout transients (EFT), and cable discharge events (CDE). Protects two line pairs The Clamp2804L is constructed using Semtechs low Low reverse current: 10nA typical (VR=2.8V) voltage EPD process technology. The EPD process Low variation in capacitance vs. bias voltage: provides low operating voltages with significant reduc- 1.3pF Typical (VR = 0 to 2.8V) tions in leakage current and capacitance over silicon- Working voltage: 2.8V avalanche diode processes. The device features low Solid-state silicon-avalanche technology variation in capacitance over bias for stable operation on GbE lines. This means the Clamp2804L will Mechanical Characteristics introduce zero traffic frame errors on GbE interfaces JEDEC SO-8 package o up to a PHY temperature of 100 C (100M Cat 5/5e Pb-Free, Halogen Free, RoHS/WEEE Compliant Cable). The Clamp2804L also features high surge Lead Finish: Matte tin capability and can be used to replace existing SLVU2.8- Molding compound flammability rating: UL 94V-0 4 devices in applications where the device is placed on the PHY side of the magnetics. In this configuration, Marking : Marking code, date code the device can withstand intra-building lightning surges Packaging : Tape and Reel per Telcordia GR-1089. The Clamp2804L is in a 8-pin SOIC package. The Applications leads are finished with lead-free matte tin. The combi- 10/100/1000 Ethernet nation of low clamping voltage, high surge capability, Integrated magnetics/RJ-45 connectors and low loading capacitance makes the uClamp2804L LAN/WAN Equipment an ideal solution for protecting GbE systems to the Security Cameras lightning immunity requirements of GR-1089. Industrial Controls Notebooks & Desktop Computers Functional Circuit Diagram Package Configuration 1.27 6.00 4.00 12 5.00 1.75 SO-8 (Max Dimensions in mm) www.semtech.com Revision 7/19/2011 1uClamp2804L PROTECTION PRODUCTS Absolute Maximum Rating Rlating Seymbo Vsalu Unit PPeak Pulse Power (tp = 8/20s) 1s00 Watt pk M)aximum Peak Pulse Current (tIp = 8/20s 1s0 Amp pp ESD per IEC 61000-4-2 (Air) V +/- 30 kV ESD ESD per IEC 61000-4-2 (Contact) +/- 30 OTperating Temperature -C40 to +125 J STtorage Temperature -C55 to +150 STG o Electrical Characteristics (T=25 C) Plarameter SsymboCmondition MlinimuTmypicaMsaximu Unit RVeverse Stand-Off Voltage 2V.8 RWM PVunch-Through Voltage I=52A 38. 33. 4V. PT PT SVnap-Back Voltage I=850mA2V. SB SB RIeverse Leakage Current V=12.8V 05.0 0A.0 R RWM CVlamping Voltage I=51A, tp = 8/20s 5V. C PP CVlamping Voltage I=010A, tp = 8/20s 1V C PP Variation in capacitance with Pins 1, 8 to 2, 7 and 1F.3 p 1 reverse bias pins 3, 6 to 4, 5 VR = 0 to 2.8V f = 1MHz Pins 1, 8 to 2, 7 and 46.5 pF JCunction Capacitance pins 3, 6 to 4, 5 j VR = 2.8V, f = 1MHz Notes: 1) This parameter guaranteed by design and characterization and is not production tested www.semtech.com 2011 Semtech Corp. 2