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ITA6V5C1 / ITA10C1 ITA18C1 / ITA25C1
MONOLITHIC TRANSIL(R) ARRAY FOR DATA LINE PROTECTION
FEATURES HIGH SURGE CAPABILITY TRANSIL ARRAY IPP = 40 A 8/20s 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 : 15kV 5ns / 50ns 40A 5ns / 50ns 1kV 1.2 / 50s 25A 8 / 20s . MIL STD 883C - Method 3015-2 VP = 25kV C = 150pF R = 150 5 s duration - ESD standard : . IEC 801-2 . IEC 801-4 . IEC 801-5
I/01 1 I/02 2 I/03 3 I/04 4
8 GND 7 6 5 GND
- Human body test : VP = 4kV C = 150pF R = 150
April 1998 - Ed: 3
EQUIVALENT TO 4 BIDIRECTIONAL TRANSILS
1/5
ITA6V5C1/ ITA10C1 / ITA18C1 / ITA25C1
ABSOLUTE RATINGS (limiting values) (0C Tamb 70C) Symbol IPP I2 t T stg Tj
Note :
Parameter Peak pulse current for 8/20 sexponential pulse Wire I2 t value Storage and Junction Temperature Range See note See note
Value 40 0.6 - 55 to + 150 125
%I pp 100 8s
Unit A A2s C C
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.
Pulse wave form 8/20 s 50
0 20 s
t
ELECTRICAL CHARACTERISTICS Symbol IRM VRM VBR VCL IPP C Parameter Leakage Current @ VRM Stand-off Voltage Breakdown Voltage Clamping Voltage Surge Current Input Capacitance
IR I RM V BR
V I
I PP
V RM
V CL
IRM @ VRM Types
max
VBR @
min Note 1
IR
VCL @ IPP
8/20s Note 1
VCL
max Note 1
IPP
8/20s
C1
max Note 2
C2
max Note 3 pF
T
max
A
V
V
mA
V
A
V
A
pF
10 /C
-4
ITA6V5C1 ITA10C1 ITA18C1 ITA25C1
10 10 4 4
5 8 15 24
6.5 10 18 25
1 1 1 1
10 15 25 33
10 10 10 10
12 19 28 38
25 25 25 25
750 570 350 300
550 260 180 100
4 8 9 12
All parameters tested at 25C, 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 (W) T j initial = 25 C
ITA25C1 ITA18C1 1E+03 ITA10C1 ITA6V5C1
o
Fig.2 : Clamping voltage versus peak pulse current exponentialwaveform 8/20 s.
1E+03 V CL (V) T j initial = 25 o C
% I PP tr = 8 100 50 0 tr t s t
1E+02 ITA25C1 ITA18C1 ITA10C1 1E+01 ITA6V5C1
1E+02
1E+01 1E-03
t P (ms) expo 1E-02 1E-01 1E+00 1E+01 1E+02
1E+00 1E-01 1E+00 1E+01
I PP (A) 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 I DC (A) exponential waveform
Fig.4 : Junction capacitance versus reverse applied voltage for one input/output(typical values).
C (pF) 1E+03 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) 1E+01
1E+02 1E+00 1E+01
V R (V) 1E+02
Note :
The curve of the figure 2 is specified for a junction temperature of 25C before surge.
3/5
ITA6V5C1/ ITA10C1 / ITA18C1 / ITA25C1
APPLICATION NOTICE Types Maximum differential voltage between two input pins at 25C
V
ITA6V5C1 ITA10C1 ITA18C1 ITA25C1 INSTRUCTION GUIDE
6.5 10 18 25
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 I/O2 2 I/O3 3
T3
8 GND 7 6 5 GND
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.
I/O4 4
Fig 6 : EQUIVALENT TO 5 BIDIRECTIONAL TRANSILS
I/O1 1 I/O2 2 I/O3 3 I/O4 4
T1
T2
8 GND 7 6 5 I/O5
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.
4/5
ITA6V5C1 / ITA10C1 / ITA18C1 / ITA25C1
ORDER CODE
ITA 25 C 1
INTEGRATED TRANSIL ARRAY PACKAGE 1=SO8 PLASTIC VBR min COMMON GROUND
MARKING TYPE MARKING
ITA6V5C1 6V5C1 ITA10C1 10C1 ITA18C1 18C1 ITA25C1 25C1
PACKAGE MECHANICAL DATA SO8 DIMENSIONS REF. A a1 a2 b b1 C c1 D E e e3 Weight : 0.077g F L M S 3.8 0.4 4.8 5.8 1.27 3.81 4.0 0.15 1.27 0.016 0.6 8 (max) 0.35 0.19 0.50 45(typ) 5.0 0.189 6.2 0.228 0.050 0.150 0.157 0.050 0.024 Millimetres 1.75 0.25 0.004 1.65 0.48 0.014 0.25 0.007 0.020 0.197 0.244 Inches 0.069 0.010 0.065 0.019 0.010 Min. Typ. Max. Min. Typ. Max. 0.1
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.
(c) 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

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