ITAxxB1 ® ASD™ BIDIRECTIONAL TRANSIL™ ARRAY FOR DATALINE PROTECTION MAIN APPLICATIONS Differential data transmission lines protection, such as : ■ ■ ■ ■ RS-232 RS-423 RS-422 RS-485 SO-8 FEATURES ■ High surge capability Transil array: IPP = 40 A (8/20µs) ■ ■ ■ ■ ■ Peak pulse power : 300 W (8/20µs) Up to 5 bidirectional Transil functions Low clamping factor (VCL / VBR) at high current level Low leakage current ESD protection up to 15kV 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. Table 1: Order Codes Part Number ITA6V5B1 ITA6V5B1RL ITA10B1 ITA18B1 ITA18B1RL ITA25B1 ITA25B1RL Figure 1: Functional Diagram COMPLIES WITH THE FOLLOWING STANDARDS: ■ ■ Marking 6V5B1 6V5B1 10B1 18B1 18B1 25B1 25B1 IEC61000-4-2 level 4: 15kV (air discharge) 8kV (contact discharge) I/O1 1 8 GND I/O2 2 7 I/O3 3 6 I/O4 4 5 GND MIL STD 883E-Method 3015-7: class3 25kV HBM (Human Body Model) TM: ASD and TRANSIL are trademarks of STMicroelectronics. December 2004 REV. 1 1/6 ITAxxB1 Table 2: Absolute Ratings (Tamb = 25°C) Symbol Parameter PPP IPP Value Unit Peak pulse power (8/20µs) (see note 1) Tj initial = Tamb 300 W Peak pulse current (8/20µs) (see note 1) Tj initial = Tamb 40 A 2 2 I t Wire I t value (see note 1) 0.6 A 2s Tj Maximum operating junction temperature 125 °C -55 to +150 °C 260 °C Tstg Storage temperature range TL Maximum lead temperature for soldering during 10 s at 5mm for case Note 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 3: Electrical Characteristics (Tamb = 25°C) Symbol Parameter I IPP VRM Stand-off voltage VBR Breakdown voltage VCL Clamping voltage IRM Leakage current IPP Peak pulse current αT Voltage temperature coefficient VF Forward voltage drop C Capacitance VBR Part Number ITA6V5B1 IRM VRM @ IR min. IRM @ VRM VCL max. @ IPP 8/20µs note 2 note 2 VCL max. @ IPP 8/20µs VCL VBR V αT C max. max. note 2 note 3 V mA µA V V A V A 10-4/°C pF 6.5 1 10 5 10 10 12 25 4 750 ITA10B1 10 1 4 8 15 10 19 25 8 570 ITA18B1 18 1 4 15 25 10 28 25 9 350 ITA25B1 25 1 4 24 33 10 38 25 12 300 Note 2: Between I/O pin and ground. Note 3: Between two input pins at 0V Bias, F = 1 MHz. 2/6 ITAxxB1 Figure 2: Pulse waveform Figure 3: Typical peak pulse power versus exponential pulse duration PPP(W) %IPP 1E+04 Tj initial=25°C 10µs 100 ITA25B1 ITA18B1 1E+03 Pulse waveform 10/1000µs 50 ITA6V5B1 ITA10B1 1E+02 0 t 1000µs tP(ms) expo 1E+01 1E-03 Figure 4: Clamping voltage versus peak pulse current (exponential waveform 8/20µs) 1E-02 1E-01 1E+00 1E+01 1E+02 Figure 5: Peak current IDC inducing open circuit of the wire for one input/output versus pulse duration (typical values) VCL(V) IDC(A) 1E+03 1E+03 %IPP Tj initial=25°C Exponential waveform 100 50 0 1E+02 tr t tp 1E+02 ITA25B1 ITA18B1 1E+01 1E+01 ITA6V5B1 ITA10B1 IPP(A) 1E+00 1E-01 1E+00 tP(ms) 1E+00 1E+01 1E-02 1E+02 Figure 6: Junction capacitance versus reverse applied voltage for one input/output (typical values) C(pF) Tj=25°C F=1MHz 1E+00 1E+01 Figure 7: Relative variation of leakage current versus junction temperature IR(Tj) IR(Tj=25°C) 1E+03 ITA6V5B1 1E-01 5E+3 VR=VRM 1E+3 1E+2 ITA10B1 1E+1 ITA18B1 1E+0 ITA25B1 Tj(°C) VR(V) 1E+02 1E-1 0 1E+00 1E+01 25 50 75 100 125 150 1E+02 3/6 ITAxxB1 This monolithic Transil Array is based on 6 unidirectional Transils with a common cathode and can be configurated to offer up to 5 bidirectional functions. This imposes a maximum differential voltage between 2 input pins (see table 4). Table 4: Application information Types Maximum differential voltage between two input pins at 25°C ITA6V5B1 + / - 3.5 v ITA10B1 + / - 5.0 v ITA18B1 + / - 9.0 v ITA25B1 + / - 12.5 v Figure 8: RS-232 junction (typical application) TX RX RTS CTS GND Figure 9: Ordering Information Scheme ITA Integrated Transil Array Breakdown Voltage (min) 25 = 25 Volt Type of lines protected B = Bidirectional Package 1 = SO-8 Packaging RL = Tape & reel Blank = Tube 4/6 25 B 1 RL ITAxxB1 Figure 10: SO-8 Package Mechanical Data REF. h x 45° C (Seating Plane) ddd C A2 A A1 e B 0.25mm (Gage Plane) k L D 8 5 E 1 H 4 A a1 a2 a3 b b1 C c1 D E e e3 F L M S DIMENSIONS Millimetres Inches Min. Typ. Max. Min. Typ. Max. 1.75 0.069 0.1 0.25 0.004 0.010 1.65 0.065 0.65 0.85 0.025 0.033 0.35 0.48 0.014 0.019 0.19 0.25 0.007 0.010 0.25 0.50 0.50 0.010 0.020 45° (typ) 4.8 5.0 0.189 0.197 5.8 6.2 0.228 0.244 1.27 0.050 3.81 0.150 3.8 4.0 0.15 0.157 0.4 1.27 0.016 0.050 0.6 0.024 8° (max) Figure 11: Foot Print Dimensions (in millimeters) 6.8 0.6 4.2 1.27 Table 5: Ordering Information Part Number Marking ITA6V5B1 6V5B1 ITA6V5B1RL ITA10B1 ITA18B1 18B1 ITA18B1RL 18B1 Package Base qty Delivery mode 2000 Ammopack 6V5B1 2500 Tape & reel 10B1 2000 Ammopack 2000 Ammopack 2500 Tape & reel SO-8 Weight 0.08 g ITA25B1 25B1 2000 Ammopack ITA25B1RL 25B1 2500 Tape & reel Table 6: Revision History Date Revision 13-Dec-2004 1 Description of Changes First issue 5/6 ITAxxB1 Information furnished is believed to be accurate and reliable. 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