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 z Computers z Printers z Communication systems It is particulary recommended for the RS232 I/O port protection where the line interface withstands only with 2kV ESD surges. Features z 2 Unidirectional Transil functions z z z Low leakage current: IR max< 20 μA at VBR 3 00W peak pulse power(8/20μs) High ESD protection level: up to 25 kV Benefits z z z 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=25°C ) Symbol Parameter Value Units PPP Peak Pulse Power (tp = 8/20μs) 300 W TL Maximum lead temperature for soldering during 10s 260 °C Tstg Storage Temperature Range -55 to +15 °C Top Operating Temperature Range -40 to +125 °C Tj Maximum junction temperature 150 °C Electrostatic discharge VPP MIL STD 883C -Method 3015-6 25 IEC61000-4-2 air discharge 16 IEC61000-4-2 contact discharge 9 kv 1/5 LESHAN RADIO COMPANY, LTD. LESDAXXXLT1G Electrical Parameter Symbol Parameter VRM Stand-off voltage VBR Breakdown voltage VCL Clamping voltage IRM Leakage current IPP Peak pulse current αT Voltage temperature coefficient VF Forward voltage drop C Capacitance Rd Dynamic resistance Electrical Characteristics Part Numbers VBR VF IR VRM IRM Rd αT C Typ.(1) Max.(2) Typ. 0v bias Min. Max. v v mA v µA v mA mΩ 10-4/°C pF LESDA5V3LT1G 5.3 5.9 1 3 2 1.25 200 280 5 220 LESDA6V1LT1G 6.1 7.2 1 5.25 20 1.25 200 350 6 140 LESDA14V2LT1G 14.2 15.8 1 12 5 1.25 200 650 10 90 25 30 1 24 1 1.2 10 1000 10 50 LESDA25LT1G 1.Square pulse IPP=15A,tp=2.5µs Max. IF 2.△VBR=aT*(Tamb-25°C)*VBR(25°C) Typical Characteristics Fig1.Peak power dissipation versus Initial junction temperature Fig2. Peak pulse power versus exponential pulse duration(Tj initial=25°C) 2/5 LESHAN RADIO COMPANY, LTD. LESDAXXXLT1G Fig3. Clamping voltage versus peak pulse current(Tj initial=25°C, rectangular Waveform,tp=2.5μs) Fig4. Capacitance versus reverse Applied voltage Fig5.Relative variation of leakage current Versus junction temperature Fig6. Peak forward voltage drop versus peak forward current Application Note 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: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M,1982 2. CONTROLLING DIMENSION: INCH. A L 3 1 V 2 A B C D G H J G C D MIN 0.1102 0.0472 0.0350 0.0150 0.0701 0.0005 INCHES MAX 0.1197 0.0551 0.0440 0.0200 0.0807 0.0040 0.0034 0.0140 0.0350 0.0830 0.0177 0.0070 0.0285 0.0401 0.1039 0.0236 DIM B S H K J K L S V 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 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 50mm Min (1.969’’) 20.2mm Min (.795’’) Full Radius G Inside Dimension Measured Near Hub Size A Max G 8 mm 330mm (12.992’’) 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 Dim(Unit:mm) 195mm*195mm*150mm 10 Reel 3000PCS/Reel 8000PCS/Reel (SOT-723,SOD-723) 10Reel/Inner Box 30KPCS/Inner Box 80KPCS/Inner Box (SOT-723,SOD-723) Dim(Unit:mm) LABEL 460mm*400mm*420mm MARK 乐山无线电股份有限公司 Leshan Radio Company,Ltd. 12 Inner Box/Carton 360KPCS/Carton 960KPCS/Carton (SOT-723,SOD-723)