ITA6V5C1 / ITA10C1 ITA18C1 / ITA25C1 MONOLITHIC TRANSIL ARRAY FOR DATA LINE PROTECTION FEATURES HIGH SURGE CAPABILITY TRANSIL ARRAY IPP = 40 A 8/20µs UP TO 5 BIDIRECTIONAL TRANSIL FUNCTIONS BREAK DOWN VOLTAGE AND MAXIMUM DIFFERENTIAL VOLTAGE BETWEEN TWO INPUT PINS : ITA6V5 = 6.5 V ITA10 = 10 V ITA18 = 18 V ITA25 = 25 V LOW CLAMPING FACTOR (VCL / VBR) AT HIGH CURRENT LEVEL LOW LEAKAGECURRENT LOW INPUT CAPACITANCE SO8 DESCRIPTION This is a specific transil array for RS232, RS423 interface protection developed in monolithic chip form in order to provide a high surge capability and a low clamping voltage FUNCTIONAL DIAGRAM IN ACCORDANCE WITH : - ESD standard : . IEC 801-2 . IEC 801-4 . IEC 801-5 15kV 5ns / 50ns 40A 5ns / 50ns 1kV 1.2 / 50µs 25A 8 / 20µs . MIL STD 883C - Method 3015-2 VP = 25kV C = 150pF R = 150Ω 5 s duration - Human body test : VP = 4kV C = 150pF R = 150Ω I/01 1 8 GND I/02 2 7 I/03 3 6 I/04 4 5 GND EQUIVALENT TO 4 BIDIRECTIONAL TRANSILS April 1998 - Ed: 3 1/5 ITA6V5C1/ ITA10C1 / ITA18C1 / ITA25C1 ABSOLUTE RATINGS (limiting values) (0°C ≤ Tamb ≤ 70°C) Symbol Parameter Value Unit IPP Peak pulse current for 8/20 µsexponential pulse See note 40 A I2 t Wire I2 t value See note 0.6 A2s - 55 to + 150 125 °C °C T stg Tj Storage and Junction Temperature Range Note : %I pp For surges greater than the maximum value specified, the input/output will present first a short circuit to the common bus line and after an open circuit caused by the wire. 8 s 100 Pulse wave form 8/20 s 50 0 t 20 s ELECTRICAL CHARACTERISTICS Symbol IRM VRM I PP Leakage Current @ VRM IR Stand-off Voltage VBR Breakdown Voltage VCL Clamping Voltage IPP Surge Current C Input Capacitance IRM @ VRM Types I Parameter max VBR @ V BR I RM V V RM IR VCL @ IPP min 8/20µs Note 1 Note 1 V CL VCL IPP C1 C2 αT max 8/20µs max max max Note 2 Note 3 Note 1 -4 µA V V mA V A V A pF pF 10 /°C ITA6V5C1 10 5 6.5 1 10 10 12 25 750 550 4 ITA10C1 10 8 10 1 15 10 19 25 570 260 8 ITA18C1 4 15 18 1 25 10 28 25 350 180 9 ITA25C1 4 24 25 1 33 10 38 25 300 100 12 All parameters tested at 25°C, except where indicated. Note 1: Between I/O pin and ground. Note 2: Between two input Pins at 0 V Bias. Note 3: Between two input Pins at VRM. 2/5 ITA6V5C1 / ITA10C1 / ITA18C1 / ITA25C1 Fig.1 : Typical Peak pulse power versus exponential pulse duration. 1E+04 PP Fig.2 : Clamping voltage versus peak pulse current exponentialwaveform 8/20 µs. (W) o 1E+03 V CL (V) T j initial = 25 C ITA25C1 ITA18C1 1E+03 ITA10C1 ITA6V5C1 % I PP tr = 8 100 50 0 tr t 1E+02 s t ITA25C1 ITA18C1 ITA10C1 1E+01 ITA6V5C1 1E+02 1E+01 1E-03 t P (ms) expo 1E-02 1E-01 1E+00 1E+01 I PP (A) 1E+00 1E+02 Fig.3 : Peak current I DC inducing open circuit of the wire for one input/output versus pulse duration (typical values). 1E+03 T j initial = 25 o C I DC (A) 1E-01 1E+00 1E+01 1E+02 Fig.4 : Junction capacitance versus reverse applied voltage for one input/output(typical values). C (pF) 1E+03 exponential waveform T j = 25 o C ITA6V5C1 f = 1 MHz 1E+02 ITA10C1 ITA18C1 1E+01 ITA25C1 1E+00 1E-02 t 1E-01 1E+00 (ms) V R (V) 1E+02 1E+01 1E+00 1E+01 1E+02 Note : The curve of the figure 2 is specified for a junction temperature of 25°C before surge. 3/5 ITA6V5C1/ ITA10C1 / ITA18C1 / ITA25C1 APPLICATION NOTICE Types Maximum differential voltage between two input pins at 25°C V ITA6V5C1 6.5 ITA10C1 10 ITA18C1 18 ITA25C1 25 INSTRUCTION GUIDE This monolithic Transil Array is based on 6 Unidirectional Transils with a common cathode and can be configurated to offer 4 or 5 bidirectional functions, according to the following customer application. Fig 5 : EQUIVALENT TO 4 BIDIRECTIONAL TRANSILS T1 T2 I/O1 1 8 GND I/O2 2 7 I/O3 3 6 T3 I/O4 4 5 GND Fig 6 : EQUIVALENT TO 5 BIDIRECTIONAL TRANSILS I/O1 1 T1 T2 8 GND I/O2 2 7 I/O3 3 6 I/O4 4 5 I/O5 4/5 UTILIZATION AS A BIDIRECTIONAL TRANSIL ARRAY WITH 4 I/Os. The main applicationof this device is to be configurated as a 4, bidirectional Transil Array as per the Pin-out of Fig 5. Pins 5 and 8 are connected to ground. INPUTS/OUTPUTS are from Pin 1 to Pin 4. Note : Thebidirectional functionis made with 2 unidirectional Transils. One (T1) is connected to the INPUT/OUTPUT, the other one (T2) is connected to the ground (see Fig 5). Ground is connected via 2 diodes T2 and T3 . This allows to withstand 2 specified surges on 2 different lines at the same time. UTILIZATION AS A BIDIRECTIONAL TRANSIL ARRAY WITH 5 I/Os. The ITAxxC1 can be used as a 5 bidirectional Transil Array. Ground can be connected to any pin (except 6 and 7). The other pins are used as INPUTS and OUTPUTS. The bidirectional function is made with 2 unidirectional Transils T1 and T2. One example with ground on Pin 8 is shown in Fig 6. This configuration allows to withstand only one specified surge at the same time. ITA6V5C1 / ITA10C1 / ITA18C1 / ITA25C1 ORDER CODE ITA 25 C 1 PACKAGE 1=SO8 PLASTIC INTEGRATED TRANSIL ARRAY VBR min COMMON GROUND MARKING TYPE ITA6V5C1 ITA10C1 ITA18C1 ITA25C1 MARKING 6V5C1 10C1 18C1 25C1 PACKAGE MECHANICAL DATA SO8 DIMENSIONS REF. Millimetres Inches Min. Typ. Max. Min. Typ. Max. A a1 0.1 a2 b b1 0.35 0.19 C c1 D E Weight : 0.077g M S 0.069 0.010 1.65 0.065 0.48 0.014 0.25 0.007 0.019 0.010 0.50 0.020 4.8 45°(typ) 5.0 0.189 0.197 5.8 6.2 0.244 e e3 F L 1.75 0.25 0.004 0.228 1.27 3.81 3.8 0.4 0.050 0.150 4.0 0.15 1.27 0.016 0.157 0.050 0.6 8° (max) 0.024 Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics 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 SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. 1998 SGS-THOMSON Microelectronics - Printed in Italy - All rights reserved. SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 5/5