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SMF05C(SMF05C).pdf
PROTECTION PRODUCTS
Description
The SMF series TVS arrays are designed to protect sen-
sitive electronics from damage or latch-up due to ESD
and other voltage-induced transient events. They are
designed for use in applications where board space is at
a premium. Each device will protect up to five lines. They
are unidirectional devices and may be used on lines where
the signal polarities are above ground.
TVS diodes are solid-state devices designed specifically
for transient suppression. They feature large cross-sec-
tional area junctions for conducting high transient cur-
rents. They offer desirable characteristics for board level
protection including fast response time, low operating
and clamping voltage, and no device degradation.
The SMF series devices may be used to meet the immu-
nity requirements of IEC 61000-4-2, level 4. The small
SC70 package makes them ideal for use in portable elec-
tronics such as cell phones, PDAs, notebook comput-
ers, and digital cameras.
SMF05C
TVS Diode Array
For ESD and Latch-Up Protection
PRELIMINARY
Features
u ESD protection for data lines to
IEC 61000-4-2 (ESD) 15kV (air), 8kV (contact)
u Small package for use in portable electronics
u Protects five I/O lines
u Working voltage: 5V
u Low leakage current
u Low operating and clamping voltages
u Solid-state silicon-avalanche technology
Mechanical Characteristics
u EIAJ SC70-6L package
u Molding compound flammability rating: UL 94V-0
u Marking : Marking Code
u Packaging : Tape and Reel per EIA 481
Applications
u Cellular Handsets & Accessories
u Cordless Phones
u Personal Digital Assistants (PDAs)
u Notebooks & Handhelds
u Portable Instrumentation
u Digital Cameras
u Peripherals
u MP3 Players
Circuit Diagram
Schematic & PIN Configuration
1
3
4
5
6
1
2
3
6
5
4
2
SC70-6L (Top View)
Revision 9/2000
1
www.semtech.com
2ã 2000 Semtech Corp.www.semtech.comPRELIMINARYPROTECTION PRODUCTSSMF05CAbsolute Maximum RatingElectrical CharacteristicsC50FMSretemaraPlobmySsnoitidnoCmuminiMlacipyTmumixaMstinUegatloVffO-dnatSesreveRVMWR5VegatloVnwodkaerBesreveRVRBItAm1=6VtnerruCegakaeLesreveRIRVMWRC°52=T,V5=5AµegatloVgnipmalCVCIPPsµ02/8=pt,A5=8.9VegatloVgnipmalCVCIPPsµ02/8=pt,A8=5.21VecnaticapaCnoitcnuJCjVRzHM1=f,V0=031FpgnitaRlobmySeulaVstinU02/8=pt(rewoPesluPkaePm)sPkp001sttaW02/8=pt(tnerruCesluPkaePm)sIPP8A)riA(2-4-00016CEIrepDSE)tcatnoC(2-4-00016CEIrepDSEVDSE0251VkerutarepmeTgniredloSdaeLTL)sdnoces01(062oCerutarepmeTgnitarepOTJ521+ot55-oCerutarepmeTegarotSTGTS051+ot55-oC
3ã 2000 Semtech Corp.www.semtech.comPROTECTION PRODUCTSPRELIMINARYPROTECTION PRODUCTSSMF05CTypical Characteristics0.010.11100.11101001000Pulse Duration - tp (µs)Peak Pulse Power - PPP (kW)Non-Repetitive Peak Pulse Power vs. Pulse Time01020304050607080901001100255075100125150Ambient Temperature - TA (oC)% of Rated Power or IPPPower Derating CurveClamping Voltage vs. Peak Pulse CurrentJunction Capacitance vs. Reverse VoltageESD Clamping Characteristics(8kV Contact Discharge per IEC 61000-4-2)0204060801001201400123456Reverse Voltage (V)Capacitance (pF)01234567890246810Ipp(A)Vclamp (V)Waveform Parameters:tr = 8µstd = 20µs
4ã 2000 Semtech Corp.www.semtech.comPRELIMINARYPROTECTION PRODUCTSSMF05C134562SMF05C Circuit DiagramProtection of Five Unidirectional LinesDevice Connection for Protection of Five Data LinesThe SMF05C is designed to protect up to five unidirec-tional data lines. The device is connected as follows:1.Unidirectional protection of five I/O lines isachieved by connecting pins 1, 3, 4, 5 and 6 to thedata lines. Pin 2 is connected to ground. Theground connection should be made directly to theground plane for best results. The path length iskept as short as possible to reduce the effects ofparasitic inductance in the board traces.Circuit Board Layout Recommendations for Suppres-sion of ESD.Good circuit board layout is critical for the suppressionof ESD induced transients. The following guidelines arerecommended:lPlace the SMF05C near the input terminals orconnectors to restrict transient coupling.lMinimize the path length between the SMSxxC andthe protected line.lMinimize all conductive loops including power andground loops.lThe ESD transient return path to ground should bekept as short as possible.lNever run critical signals near board edges.lUse ground planes whenever possible.Applications Information
5ã 2000 Semtech Corp.www.semtech.comPROTECTION PRODUCTSPRELIMINARYPROTECTION PRODUCTSSMF05CTypical Applications
6ã 2000 Semtech Corp.www.semtech.comPRELIMINARYPROTECTION PRODUCTSSMF05CLand Pattern - SC70-6LOutline Drawing - SC70-6L
7ã 2000 Semtech Corp.www.semtech.comPROTECTION PRODUCTSPRELIMINARYPROTECTION PRODUCTSSMF05CContact InformationSemtech CorporationProtection Products Division652 Mitchell Rd., Newbury Park, CA 91320Phone: (805)498-2111 FAX (805)498-3804Marking CodesOrdering InformationrebmuNtraPgnikroWegatloVleeRrepytQeziSleeRCT.C50FMSV5000,3hcnI7GT.C50FMSV5000,01hcnI31rebmuNtraPgnikraMedoCC50FMSC5FNote:(1) Pin 1 Identified with a dot
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