ITA18B1 STMicroelectronics

ITAxxB1 Bidirectional Transil array for data line protection Features High surge capability Transil array: I = 40 A (8/20 s) PP Peak pulse power: 300 W (8/20 s) Up to 5 bidirectional Transil functions SO-8 Low clamping factor (V / V ) at high current CL BR level Low leakage current Figure 1. Functional diagram ESD protection up to 15 kV Complies with the following standards I/O1 1 8 GND IEC 61000-4-2 level 4 I/O2 2 7 15 kV (air discharge) 3 6 I/O3 8 kV (contact discharge) MIL STD 883G- Method 3015-7: class 3B I/O4 4 5 GND 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 ICs. The ITA series combines high surge capability against energetic pulses with high voltage performance against ESD. TM: Transil is a trademark of STMicroelectronics November 2007 Rev 2 1/7 www.st.com 7Characteristics ITAxxB1 1 Characteristics Table 1. Absolute ratings (T = 25 C) amb Symbol Parameter Value Unit (1) P Peak pulse power (8/20 s) T initial = T 300 W PP j amb (1) I Peak pulse current (8/20 s) T initial = T 40 A PP j amb 2 2 (1) 2 I tWire I t value 0.6 A s T Maximum operating junction temperature 125 C j T Storage temperature range -55 to +150 C stg T Maximum lead temperature for soldering during 10 s at 5 mm for case 260 C L 1. For surges greater than the specified maximum value, the I/O will first present a short-circuit and after an open circuit caused by the wire melting. Table 2. Electrical characteristics (T = 25 C) amb Symbol Parameter I IPP V Stand-off voltage RM V Breakdown voltage BR V Clamping voltage CL IRM V VRM VCL I Leakage current RM VBR I Peak pulse current PP T Voltage temperature coefficient C Capacitance V I I V V I V I TC BR R RM RM CL PP CL PP min. 8/20 s max. 8/20 s max. max. Order code max. (1) (1) (1) (2) -4 V mA A V VAVA 10 / C pF ITA6V5B1 6.5 1 10 5 10101225 4 750 ITA10B1 10 1 4 8 15 10 19 25 8 570 ITA18B1 18 1 4 15 25102825 9 350 ITA25B1 25 1 4 24 33103825 12 300 1. Betwenn I/O pin and ground. 2. Between two input pins at 0 V Bias, F = 1 MHz. 2/7