LESHAN RADIO COMPANY, LTD. Dual transil array for ESD protection LESDA5V3LT1G LESDA6V1LT1G LESDA14V2LT1G LESDA25VLT1G General Description The LESDA5V3LT1G 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. 3 1 2 Applications SOT– 23 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 O rdering Information Benefits z z z High ESD protection level up to 25 kV. High integration. Suitable for high density boards. Device Complies with the following standards Marking Shipping LESDA5V3LT1G E53 3000/Tape&Reel LESDA5V3LT3G E53 10000/Tape&Reel LESDA6V1LT1G E61 3000/Tape&Reel LESDA6V1LT3G E61 10000/Tape&Reel IEC61000-4-2 Level 4 LESDA14V2LT1G E14 3000/Tape&Reel MIL STD 883c - Method 3015-6 Class 3 LESDA14V2LT3G E14 10000/Tape&Reel (Human Body Model) LESDA25VLT1G E25 3000/Tape&Reel LESDA25VLT3G E25 10000/Tape&Reel 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 Rev.O 1/5 LESHAN RADIO COMPANY, LTD. LESDA5V3LT1G, LESDA6V1LT1G, LESDA14V2LT1G,LESDA25VLT1G 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 VRM IRM Rd αT Typ.(1) Max.(2) C Min. Max. v v v µA v mA mΩ 10-4/°C pF LESDA5V3LT1G 5.3 5.9 3 2 1.25 200 280 5 220 LESDA6V1LT1G 6.1 7.2 5.25 20 1.25 200 350 6 140 LESDA14V2LT1G 14.2 15.8 12 5 1.25 200 650 10 90 LESDA25VLT1G 25 30 24 1 1.2 10 1000 10 50 1.Square pulse IPP=15A,tp=2.5µs Max. IF Typ. 0v bias 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) Rev.O 2/5 LESHAN RADIO COMPANY, LTD. LESDA5V3LT1G, LESDA6V1LT1G, LESDA14V2LT1G,LESDA25VLT1G 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. Rev.O 3/5 LESHAN RADIO COMPANY, LTD. LESDA5V3LT1G, LESDA6V1LT1G, LESDA14V2LT1G,LESDA25VLT1G Rev.O 4/5 LESHAN RADIO COMPANY, LTD. LESDA5V3LT1G, LESDA6V1LT1G, LESDA14V2LT1G,LESDA25VLT1G SOT-23 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M,1982 2. CONTROLLING DIMENSION: INCH. A L 3 1 V 2 DIM B S G C D H K J MIN 0.1102 0.0472 0.0350 0.0150 0.0701 0.0005 0.0034 0.0140 0.0350 0.0830 0.0177 A B C D G H J K L S V 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 0.177 0.35 0.69 0.89 1.02 2.10 2.64 0.45 0.60 0.037 0.95 0.037 0.95 0.079 2.0 0.035 0.9 0.031 0.8 inches mm Rev.O 5/5