ITA6V5B1 / ITA10B1
ITA18B1 / ITA25B1
January 1998 Ed: 2
BIDIRECTIONAL TRANSIL
TM
ARRAY
FOR DATALINE PROTECTION
SO8
Differential data transmission lines protection :
- RS-232
- RS-423
- RS-422
- RS-485
APPLICATIONS
Application Specific Discretes
A.S.D.
TM
FUNCTIONAL DIAGRAM
1
2
3
4
I/O1
I/ O2
I/O 3
I/O 4
G N D
G N D
8
7
6
5
HIGH SURGE CAPABILITY TRANSIL ARRAY
I
PP
= 40 A (8/20
s)
PEAK PULSE POWER : 300 W (8/20
s)
UP TO 5 BIDIRECTIONAL TRANSIL FUNCTIONS
LOW CLAMPING FACTOR (V
CL
/ V
BR
) AT HIGH
CURRENT LEVEL
LOW LEAKAGE CURRENT
ESD PROTECTION UP TO 15kV
FEATURES
DESCRIPTION
Transil diode arrays
provide high overvoltage
protectionby 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 allies high surge capability against
energetic pulses with high voltage performance
against ESD.
IEC 1000-4-2 : level 4
IEC 1000-4-4 : level 4
IEC 1000-4-5 : level 2
MIL STD 883C - Method 3015-6 : class 3
(human body model)
COMPLIESWITH THE FOLLOWINGSTANDARDS :
1/5
Symbol
Parameter
V
RM
Stand-off voltage
V
BR
Breakdown voltage
V
CL
Clamping voltage
I
RM
Leakage current @ V
RM
I
PP
Peak pulse current
T
Voltage temperature coefficient
C
Junction capacitance
ELECTRICAL CHARACTERISTICS (T
amb
= 25
C)
Symbol
Parameter
Value
Unit
P
PP
Peak pulse power dissipation (8/20
s)
(see note 1)
Tj initial = T
amb
300
W
I
PP
Peak pulse current (8/20
s) (see note 1)
Tj initial = T
amb
40
A
I
2
t
Wire I
2
t value (see note 1)
0.6
A
2
s
T
stg
T
j
Storage temperature range
Maximum operating junction temperature
- 55 to + 150
125
C
C
T
L
Maximum lead temperature for soldering during 10s
260
C
ABSOLUTE MAXIMUM RATINGS (T
amb
= 25
C)
100
50
0
20 s
t
%I
pp
8 s
Pulse wave form 8/20 s
Types
I
RM
@
V
RM
V
BR
@
I
R
V
CL
@
I
PP
V
CL
@
I
PP
T
C
max.
min.
8/20
s
max.
8/20
s
max.
max.
note 2
note 2
note 2
note 3
A
V
V
mA
V
A
V
A
10
-4
/
C
pF
ITA6V5B1
10
5
6.5
1
10
10
12
25
4
750
ITA10B1
4
8
10
1
15
10
19
25
8
570
ITA18B1
4
15
18
1
25
10
28
25
9
350
ITA25B1
4
24
25
1
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.
Preferred types in bold
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.
ITA6V5B1 / ITA10B1 / ITA18B1 / ITA25B1
2/5
P
(W)
1E-03
1E-02
1E-01
1E+00
1E+01
1E+02
1E+01
1E+02
1E+03
1E+04
T
initial = 25 C
j
o
t
(ms) expo
P
P
ITA25B1
ITA18B1
ITA10B1
ITA6V5B1
P
Fig. 1 : Typical peak pulse power versus
exponential pulse duration.
I
(A)
1E-02
1E-01
1E+00
1E+01
1E+00
1E+01
1E+02
1E+03
DC
expon ential waveform
t (ms)
Fig. 3 : Peak current I
DC
inducing open circuit of
the wire for one input/output versus pulse duration
(typical values).
Fig. 4 : Junction capacitance versus reverse
applied voltage for one input/output (typical
values).
Fig.
2 : Clamping voltage versus peak pulse
current (exponential waveform 8/20
s).
Fig. 5 : Relative variation of leakage current
versus junction temperature
ITA6V5B1 / ITA10B1 / ITA18B1 /ITA25B1
3/5
This monolithic Transil Array is based on 6
unidirectional Transils with a commoncathode and
can be configurated to offer up to 5 bidirectional
functions. This imposes a maximum differential
voltage between 2 input pins (see opposite table).
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
APPLICATION INFORMATION
ORDER CODE
ITA
25 B 1
RL
INTEGRATED
TRANSIL ARRAY
V
BR
min
PACKAGE : SO8 PLASTIC
BIDIRECTIONAL
PACKAGING:
RL = Tape and reel.
= Tube.
Typical application : RS232 junction.
GND
CTS
RTS
TX
RX
ITA6V5B1 / ITA10B1 / ITA18B1 / ITA25B1
4/5
TYPE
MARKING
ITA6V5B1
6V5B1
ITA10B1
10B1
ITA18B1
18B1
ITA25B1
25B1
MARKING
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics 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 SGS-THOMSON Microelectronics. Specifications mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-
THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems withoutexpress writ-
ten approval of SGS-THOMSON Microelectronics.
1998 SGS-THOMSON Microelectronics - Printed in Italy - All rights reserved.
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Morocco
The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
PACKAGE MECHANICAL DATA
SO8 (Plastic)
REF.
DIMENSIONS
Millimetres
Inches
Min.
Typ.
Max.
Min.
Typ.
Max.
A
1.75
0.069
a1
0.1
0.25 0.004
0.010
a2
1.65
0.065
b
0.35
0.48 0.014
0.019
b1
0.19
0.25 0.007
0.010
C
0.50
0.020
c1
45
(typ)
D
4.8
5.0
0.189
0.197
E
5.8
6.2
0.228
0.244
e
1.27
0.050
e3
3.81
0.150
F
3.8
4.0
0.15
0.157
L
0.4
1.27 0.016
0.050
M
0.6
0.024
S
8
(max)
Packaging: Preferred packagingis tape and reel.
Weight : 0.08g.
ITA6V5B1 / ITA10B1 / ITA18B1 /ITA25B1
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