ESDA6V1U1 ® Application Specific Discretes A.S.D. TRANSIL ARRAY FOR ESD PROTECTION APPLICATIONS Where transient overvoltage protection in ESD sensitive equipment is required, such as : - COMPUTERS - PRINTERS - COMMUNICATION SYSTEMS - GSM HANDSETS AND ACCESSORIES - CAR RADIO It is particulary recommended for parallel port protection where the line interface withstands only 2 kV ESD surge. SO8 FEATURES 6 UNIDIRECTIONAL TRANSIL FUNCTIONS LOW LEAKAGE CURRENT: IR max. < 2 µA 200 W PEAK PULSE POWER (8/20 µs) FUNCTIONAL DIAGRAM DESCRITION The ESDA6V1U1 is a 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. I/O 1 8 I/O 6 I/O 2 2 7 GND BENEFITS I/O 3 3 6 GND High ESD protection level : up to 25 kV High integration Suitable for high density boards I/O 4 4 5 I/O 5 COMPLIES WITH THE FOLLOWING STANDARDS : IEC 1000-4-2 : level 4 MIL STD 883C-Method 3015-6 : class3 (human body model) January 1998 - Ed : 2 1/6 ESDA6V1U1 ABSOLUTE MAXIMUM RATINGS (Tamb = 25°C) Symbol Parameter Value Unit VPP Electrostatic discharge MIL STD 883C - Method 3015-6 25 kV PPP Peak pulse power (8/20µs) 200 W Tstg Tj Storage temperature range Maximum junction temperature - 55 to + 150 125 °C °C TL Maximum lead temperature for soldering during 10s 260 °C ELECTRICAL CHARACTERISTICS (Tamb = 25°C) Symbol Parameter VRM Stand-off voltage VBR Breakdown voltage VCL Clamping voltage IRM Leakage current IPP Peak pulse current αT Voltage temperature coefficient C Capacitance Rd Dynamic resistance VF Forward voltage drop Types VBR min. ESDA6V1U1 IR @ max. Rd αT C max. typ. max. typ. note 1 note 2 0V bias VF @ IF max. V V mA µA V Ω 10-4/°C pF V mA 6.1 7.2 1 2 5 0.5 6 100 1.5 200 note 1 : Square pulse, Ipp = 25A, tp=2.5µs. note 2 : ∆ VBR = αT* (Tamb -25°C) * VBR (25°C) 2/6 IRM @ VRM ESDA6V1U1 ESDA6V1U1 CALCULATION OF THE CLAMPING VOLTAGE USE OF THE DYNAMIC RESISTANCE The ESDA family has been designed to clamp fast spikes like ESD. Generally the PCB designers need to calculate easily the clamping voltage VCL. This is why we give the dynamic resistance in addition to the classical parameters. The voltage across the protection cell can be calculated with the following formula: VCL = VBR + Rd IPP As the value of the dynamic resistance remains stable for a surge duration lower than 20µs, the 2.5µs rectangular surge is well adapted. In addition both rise and fall times are optimized to avoid any parasitic phenomenon during the measurement of Rd. Where Ipp is the peak current through the ESDA cell. DYNAMIC RESISTANCE MEASUREMENT The short duration of the ESD has led us to prefer a more adapted test wave, as below defined, to the classical 8/20µs and 10/1000µs surges. I Ipp 2µs t tp = 2.5µs 2.5µs duration measurement wave. 3/6 ESDA6V1U1 Fig. 1 : Peak power dissipation versus initial junction temperature. Fig. 2 : Peak pulse power versus exponential pulse duration (Tj initial = 25 °C). Ppp[Tj initial]/Ppp[Tj initial=25°C] 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 Ppp(W) 2000 1000 100 Tj initial(°C) 0 25 50 75 tp(µs) 100 125 150 10 1 10 100 Fig. 4 : Capacitance versus reverse applied voltage (typical values). Fig. 3 : Clamping voltage versus peak pulse current (Tj initial = 25 °C). Rectangular waveform tp = 2.5 µs. C(pF) Ipp(A) 100 50.0 F=1MHz Vosc=30mV tp=2.5µs 10.0 50 1.0 20 VR(V) VCL(V) 0.1 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Fig. 5 : Relative variation of leakage current versus junction temperature (typical values). 10 1 2 5 10 Fig. 6 : Peak forward voltage drop versus peak forward current (typical values). IR[Tj] / IR[Tj=25°C] 200 5.00 IFM(A) 100 Tj=25°C 1.00 10 0.10 Tj(°C) 1 25 4/6 50 75 VFM(V) 100 125 0.01 0.0 0.5 1.0 1.5 2.0 2.5 3.0 ESDA6V1U1 ESDA6V1U1 APPLICATION EXAMPLE : Protection of logic-level signals. ESDA6V1U1 0 to 5 V D1 0 to 5 V D2 0 to 5 V Dn APPLICATION EXAMPLE : Protection of symmetrical signals. Note : Capacitance value between any I/O pin and Ground is divided by 2. ESDA6V1U1 A1 A2 A3 A4 +/- 2.5 V +/- 2. 5 V +/- 2.5 V +/- 2.5 V 5/6 ESDA6V1U1 ORDER CODE ESDA 6 V 1 U 1 RL PACKAGING: RL = Tape and reel = Tube PACKAGE: SO8 PLASTIC ESD ARRAY Unidirectionel VBR min MARKING : Logo, Date Code, E6VU1 PACKAGE MECHANICAL DATA SO8 Plastic DIMENSIONS REF. Millimetres Min. A a1 a2 b b1 C c1 D E e e3 F L M S Typ. Max. Min. Typ. Max. 1.75 0.25 0.004 1.65 0.48 0.014 0.25 0.007 0.069 0.010 0.065 0.019 0.010 0.1 0.35 0.19 0.50 0.020 45° (typ) 5.0 0.189 6.2 0.228 4.8 5.8 1.27 3.81 3.8 0.4 Inches 0.197 0.244 0.050 0.150 4.0 0.15 1.27 0.016 0.6 8° (max) 0.157 0.050 0.024 Packaging : Preferred packaging is tape and reel. Weight : 0.08g. Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. © 1998 STMicroelectronics - Printed in Italy - All rights reserved. STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 6/6