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ITAxx REQUIRES A SYSTEM APPROACH REV. 2 INTRODUCTION Destined for the protection of data transmission li nes, each one of these components corresponds to a particular application. Therefore, one no longer chooses an ITAxx - type protection as he did a Transil diode. In order to accu- rately select the correct component, one must take into account the entire system and analyse the follow- ing points: – Against what type of disturbances do we want protection? – What Transil array configuration do we need (number of I/O, voltage of the line signal)? – What type of interface circuit are we protecting, and what are the destruction limits? Once this step is done, the only thing left to do is to define the adapted Transil array. To help the user, a detailed description of the characteristics and the functioning mode of the ITAxx arrays is required. The protection level of the ITAxx The protection of electronic and computer systems against ESD and EOS disturbances is regulated by numerous standards, such as IEC801-xxx, Mil Standard, etc. Within one standard, the protection levels change in function of the application. Figure 1.
Figure 6. The use of Transil Arrays as Emi Filter O = 17 MHz and an attenuation equal to 28dB at 80MHz. The ITAxx assures a multi-channel protection without disturbing the signal transmissions. max (see Figure 8) for a duration of 0.4µs (see Figure 9).
Figure 9. Inter-Line Interface (duration) is generally ajusted to ± 1V. among the 51 us of one bit at 19600 bauds (see Figure 9). tions (see Annex 2: Transil Arrays-Configurations). Table 1. Transil Array Utilization
18 Lines
Figure 10. Transil Arrays Product Range-Configurations
4 TRANSIL 8 TRANSIL 6 TRANSIL 8 TRANSIL 18 TRANSIL 8 TRANSIL 18 TRANSIL
Table 2. Protection Standards Applicable to Computer and Electronic Systems
REVISION HISTORY
Table 3. Revision History 3-June-2004 2 Stylesheet update. No content change.
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