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(R)
ITAXXB1
BIDIRECTIONAL TRANSILTM ARRAY FOR DATALINE PROTECTION
ASDTM
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 (8/20s)

Peak pulse power : 300 W (8/20s) 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
Marking 6V5B1 6V5B1 10B1 18B1 18B1 25B1 25B1
Figure 1: Functional Diagram
I/O1 I/O2
1 2 3 4
8 GND 7 6 5 GND
COMPLIES WITH THE FOLLOWING STANDARDS:
IEC61000-4-2 level 4: 15kV (air discharge) 8kV (contact discharge) MIL STD 883E-Method 3015-7: class3 25kV HBM (Human Body Model)
I/O3 I/O4
TM: ASD and TRANSIL are trademarks of STMicroelectronics.
December 2004
REV. 1
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ITAXXB1
Table 2: Absolute Ratings (Tamb = 25C) Symbol PPP IPP It Tj Tstg TL
2
Parameter Peak pulse power (8/20s) (see note 1) Peak pulse current (8/20s) (see note 1) Wire I t value (see note 1) Maximum operating junction temperature Storage temperature range Maximum lead temperature for soldering during 10 s at 5mm for case
2
Value Tj initial = Tamb Tj initial = Tamb 300 40 0.6 125 -55 to +150 260
Unit W A A 2s C C C
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 = 25C) Symbol VRM VBR VCL IRM IPP T VF C Parameter Stand-off voltage Breakdown voltage Clamping voltage Leakage current Peak pulse current Voltage temperature coefficient Forward voltage drop Capacitance
IRM VRM VCL VBR V I IPP
VBR Part Number min.
note 2
@ IR
IRM max.
@
VRM
VCL
note 2
@
IPP
VCL max.
note 2
@
IPP
T max. 10-4/C 4 8 9 12
C max.
note 3
8/20s V 5 8 15 24 V 10 15 25 33 A 10 10 10 10
8/20s A 25 25 25 25
V ITA6V5B1 ITA10B1 ITA18B1 ITA25B1 6.5 10 18 25
mA 1 1 1 1
A 10 4 4 4
V 12 19 28 38
pF 750 570 350 300
Note 2: Between I/O pin and ground. Note 3: Between two input pins at 0V Bias, F = 1 MHz.
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ITAXXB1
Figure 2: Pulse waveform Figure 3: Typical peak pulse power versus exponential pulse duration
PPP(W)
1E+04 Tj initial=25C
%IPP
100 10s
ITA25B1 ITA18B1
1E+03
Pulse waveform 10/1000s 50
1E+02
ITA6V5B1 ITA10B1
0 1000s
t
1E+01 1E-03 1E-02
tP(ms) expo
1E-01 1E+00 1E+01 1E+02
Figure 4: Clamping voltage versus peak pulse current (exponential waveform 8/20s)
VCL(V)
1E+03 Tj initial=25C
Figure 5: Peak current IDC inducing open circuit of the wire for one input/output versus pulse duration (typical values)
IDC(A)
1E+03
%IPP
100 50
Exponential waveform
1E+02
ITA25B1 ITA18B1
0
tr
tp
t
1E+02
1E+01
ITA6V5B1 ITA10B1
1E+01
1E+00 1E-01 1E+00
IPP(A)
1E+01 1E+02
1E+00 1E-02 1E-01
tP(ms)
1E+00 1E+01
Figure 6: Junction capacitance versus reverse applied voltage for one input/output (typical values)
C(pF)
1E+03
ITA6V5B1
Figure 7: Relative variation of leakage current versus junction temperature
Tj=25C F=1MHz
IR(Tj) IR(Tj=25C)
5E+3 1E+3 VR=VRM
ITA10B1
1E+2
ITA18B1
1E+1
1E+0
ITA25B1
Tj(C)
1E-1 0 25 50 75 100 125 150
1E+02 1E+00
VR(V)
1E+01 1E+02
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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 ITA6V5B1 ITA10B1 ITA18B1 ITA25B1 Maximum differential voltage between two input pins at 25C + / - 3.5 v + / - 5.0 v + / - 9.0 v + / - 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
25
B
1
RL
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ITAXXB1
Figure 10: SO-8 Package Mechanical Data REF.
C (Seating Plane) A2 A h x 45 0.25mm (Gage Plane)
ddd C
B
e
A1
k
L
D
8
5
E
H
1
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 ITA6V5B1 ITA6V5B1RL ITA10B1 ITA18B1 ITA18B1RL ITA25B1 ITA25B1RL Table 6: Revision History Date 13-Dec-2004 Revision 1 First issue
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Marking 6V5B1 6V5B1 10B1 18B1 18B1 25B1 25B1
Package
Weight
Base qty 2000 2500 2000
Delivery mode Ammopack Tape & reel Ammopack Ammopack Tape & reel Ammopack Tape & reel
SO-8
0.08 g
2000 2500 2000 2500
Description of Changes
ITAXXB1
Information furnished is believed to be accurate and reliable. However, STMicroelectronics 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 STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners (c) 2004 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com
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