November 2007 Rev 2 1/7
7
ITAxxB1
Bidirectional Transil™ array for data line protection
Features
■ High surge capability Transil array:
I
PP
= 40 A (8/20 µs)
■ Peak pulse power: 300 W (8/20 µs)
■ Up to 5 bidirectional Transil functions
■ Low clamping factor (V
CL
/ V
BR
) at high current
level
■ Low leakage current
■ ESD protection up to 15 kV
Complies with the following standards
■ IEC 61000-4-2 level 4
– 15 kV (air discharge)
– 8 kV (contact discharge)
■ MIL STD 883G- Method 3015-7: class 3B
– 25 kV (human body model)
Applications
Differential data transmission line protection, such
as:
■ RS-232
■ RS-423
■ RS-422
■ RS-485
Description
Transil diode arrays provide high overvoltage
protection by clamping action. Their
instantaneous response to transient overvoltages
makes them particularly suited to protect voltage
sensitive devices such as MOS technology and
low voltage supplied IC’s.
The ITA series combines high surge capability
against energetic pulses with high voltage
performance against ESD.
TM: Transil is a trademark of STMicroelectronics
Figure 1. Functional diagram
SO-8
1
2
3
4
I/O1
I/O2
I/O3
I/O4
GND
GND
8
7
6
5
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