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| LESHAN RADIO COMPANY, LTD. Dual transil array for ESD protection General Description The LESDAxxxLT1G is a dual monolithic voltage suppressor designed to protect components which are connected to data and transmission lines against ESD. It clamps the voltage just above the logic level supply for positive transients, and to a diode drop below ground for negative transients. It can also work as bidirectionnal suppressor by connecting only pin1 and 2. LESDAXXXLT1G 3 1 2 SOT- 23 Applications Computers Printers Communication systems It is particulary recommended for the RS232 I/O port protection where the line interface withstands only with 2kV ESD surges. Features 2 Unidirectional Transil functions Low leakage current: IR max< 20 A at VBR 3 00W peak pulse power(8/20s) High ESD protection level: up to 25 kV Benefits High ESD protection level up to 25 kV. High integration. Suitable for high density boards. Complies with the following standards IEC61000-4-2 Level 4 MIL STD 883c - Method 3015-6 Class 3 (Human Body Model) Absolute Ratings (Tamb=25C ) Symbol Parameter Value Units PPP TL Tstg Top Tj Peak Pulse Power (tp = 8/20s) Maximum lead temperature for soldering during 10s Storage Temperature Range Operating Temperature Range Maximum junction temperature Electrostatic discharge MIL STD 883C -Method 3015-6 IEC61000-4-2 air discharge IEC61000-4-2 contact discharge 300 260 -55 to +15 -40 to +125 150 25 16 9 W C C C C VPP kv 1/5 LESHAN RADIO COMPANY, LTD. LESDAXXXLT1G Electrical Parameter Symbol VRM VBR VCL IRM IPP T VF C Rd Parameter Stand-off voltage Breakdown voltage Clamping voltage Leakage current Peak pulse current Voltage temperature coefficient Forward voltage drop Capacitance Dynamic resistance Electrical Characteristics Part Numbers Min. v LESDA5V3LT1G LESDA6V1LT1G LESDA14V2LT1G LESDA25LT1G VBR Max. v 5.9 7.2 15.8 30 IR mA 1 1 1 1 VRM v 3 5.25 12 24 IRM A 2 20 5 1 VF Max. v 1.25 1.25 1.25 1.2 IF mA 200 200 200 10 Rd Typ.(1) m 280 350 650 1000 T Max.(2) 10-4/C 5 6 10 10 C Typ. 0v bias pF 220 140 90 50 5.3 6.1 14.2 25 1.Square pulse IPP=15A,tp=2.5s 2.VBR=aT*(Tamb-25C)*VBR(25C) Typical Characteristics Fig1.Peak power dissipation versus Initial junction temperature Fig2. Peak pulse power versus exponential pulse duration(Tj initial=25C) 2/5 LESHAN RADIO COMPANY, LTD. LESDAXXXLT1G Fig3. Clamping voltage versus peak pulse current(Tj initial=25C, rectangular Waveform,tp=2.5s) Fig4. Capacitance versus reverse Applied voltage Fig5.Relative variation of leakage current Versus junction temperature Application Note Fig6. Peak forward voltage drop versus peak forward current Electrostatic discharge (ESD) is a major cause of failure in electronic systems. Transient Voltage Suppressors (TVS) are an ideal choice for ESD protection. They are capable of clamping the incoming transient to a low enough level such that damage to the protected semiconductor is prevented. Surface mount TVS arrays offer the best choice for minimal lead inductance. They serve as parallel protection elements, connected between the signal line to ground. As the transient rises above the operating voltage of the device, the TVS array becomes a low impedance path diverting the transient current to ground. The ESDAxxL array is the ideal board evel protection of ESD sensitive semiconductor components. The tiny SOT23 package allows design flexibility in the design of high density boards where the space saving is at a premium. This enables to shorten the routing and contributes to hardening againt ESD. 3/5 LESHAN RADIO COMPANY, LTD. LESDAXXXLT1G 4/5 LESHAN RADIO COMPANY, LTD. LESDAXXXLT1G SOT-23 NOTES: A L 3 1 V G 2 BS DIM A B C D G H J J K L S V MIN 0.1102 0.0472 0.0350 0.0150 0.0701 0.0005 0.0034 0.0140 0.0350 0.0830 0.0177 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M,1982 2. CONTROLLING DIMENSION: INCH. INCHES MAX 0.1197 0.0551 0.0440 0.0200 0.0807 0.0040 0.0070 0.0285 0.0401 0.1039 0.0236 MILLIMETERS MIN MAX 2.80 3.04 1.20 1.40 0.89 1.11 0.37 0.50 1.78 2.04 0.013 0.100 0.085 0.35 0.89 2.10 0.45 0.177 0.69 1.02 2.64 0.60 C D H K 0.037 0.95 0.037 0.95 0.079 2.0 0.035 0.9 0.031 0.8 inches mm 5/5 LESHAN RADIO COMPANY, LTD. EMBOSSED TAPE AND REEL DATA FOR DISCRETES T Max Outside Dimension Measured at Edge 13.0mm 0.5mm 1.5mm Min (.512 .002'') (.06'') A 20.2mm Min (.795'') 50mm Min (1.969'') Full Radius G Inside Dimension Measured Near Hub Size 8 mm A Max 330mm (12.992'') G 8.4mm+1.5mm, -0.0 (.33''+.059'', -0.00) T Max 14.4mm (.56'') Reel Dimensions Metric Dimensions Govern -- English are in parentheses for reference only Storage Conditions Temperature: 5 to 40 Deg.C (20 to 30 Deg. C is preferred) Humidity: 30 to 80 RH (40 to 60 is preferred ) Recommended Period: One year after manufacturing (This recommended period is for the soldering condition only. The characteristics and reliabilities of the products are not restricted to this limitation) LESHAN RADIO COMPANY, LTD. Shipment Specification CPN LABEL LABEL LABEL 10Reel/Inner Box 30KPCS/Inner Box Dim(Unit:mm) 195mm*195mm*150mm 10 Reel 3000PCS/Reel 8000PCS/Reel (SOT-723,SOD-723) 80KPCS/Inner Box (SOT-723,SOD-723) Dim(Unit:mm) 460mm*400mm*420mm LABEL MARK Leshan Radio Company,Ltd. 12 Inner Box/Carton 360KPCS/Carton 960KPCS/Carton (SOT-723,SOD-723) |
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