ITA18B1RL [STMICROELECTRONICS]
Bidirectional Transil⑩ array for data line protection; 双向的Transil ™阵列数据线路保护
| 型号： | ITA18B1RL |
| 厂家： | 
ST |
| 描述： | Bidirectional Transil⑩ array for data line protection |
| 文件： | 总7页 (文件大小：88K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ITAxxB1
Bidirectional Transil™ array for data line protection
Features
■ High surge capability Transil array:
= 40 A (8/20 µs)
I
PP
■ Peak pulse power: 300 W (8/20 µs)
■ 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
2
3
4
8 GND
■ IEC 61000-4-2 level 4
– 15 kV (air discharge)
– 8 kV (contact discharge)
I/O2
I/O3
I/O4
7
6
5
■ MIL STD 883G- Method 3015-7: class 3B
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 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
November 2007
Rev 2
1/7
www.st.com
7
Characteristics
ITAxxB1
1
Characteristics
Table 1.
Symbol
Absolute ratings (T
= 25 °C)
amb
Parameter
Value
Unit
P
Peak pulse power (8/20 µs)(1)
Peak pulse current (8/20 µs)(1)
Wire I2t value(1)
T initial = T
j
300
40
W
A
PP
amb
I
T initial = T
j
PP
amb
I2t
0.6
A2s
°C
°C
°C
T
Maximum operating junction temperature
Storage temperature range
125
j
T
-55 to +150
260
stg
T
Maximum lead temperature for soldering during 10 s at 5 mm for case
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.
Symbol
Electrical characteristics (T
= 25 °C)
amb
Parameter
I
IPP
V
Stand-off voltage
RM
V
Breakdown voltage
Clamping voltage
Leakage current
BR
V
CL
IRM
V
VRM
VCL
VBR
I
RM
I
Peak pulse current
Voltage temperature coefficient
Capacitance
PP
αT
C
VBR
@ IR
IRM
@
VRM
VCL
@
IPP
VCL
@
IPP
αT
C
min.
8/20 µs
max.
8/20 µs
max.
max.
Order code
max.
(1)
(1)
(1)
(2)
V
mA
1
µA
10
4
V
5
V
A
V
A
10-4/ °C
pF
ITA6V5B1
ITA10B1
ITA18B1
ITA25B1
6.5
10
18
25
10
15
25
33
10
10
10
10
12
19
28
38
25
25
25
25
4
8
750
570
350
300
1
8
1
4
15
24
9
1
4
12
1. Betwenn I/O pin and ground.
2. Between two input pins at 0 V Bias, F = 1 MHz.
2/7
ITAxxB1
Figure 2.
Characteristics
Pulse waveform
Figure 3.
Typical peak pulse power versus
exponential pulse duration
P
PP
(W)
1E+04
%IPP
Tj initial=25°C
ITA25B1
8 µs
ITA18B1
ITA10B1
100
50
1E+03
Pulse waveform 8/20 µs
ITA6V5B1
1E+02
1E+01
0
t
t (ms) expo
P
20 µs
1E-03
1E-02
1E-01
1E+00
1E+01
1E+02
Figure 4.
Clamping voltage versus peak
pulse current (exponential
waveform 8/20 µs)
Figure 5.
Peak current I inducing open
DC
circuit of the wire for one
input/output versus pulse duration
(typical values)
V
(V)
I
(A)
CL
DC
1E+03
1E+02
1E+03
1E+02
%IPP
100
Tj initial=25°C
Exponential waveform
50
0
t
tr
tp
ITA25B1
ITA18B1
1E+01
1E+00
1E+01
1E+00
ITA10B1
1E+00
ITA6V5B1
I
(A)
t (ms)
P
PP
1E-01
1E+01
1E+02
1E-02
1E-01
1E+00
1E+01
Figure 6.
Junction capacitance versus
reverse applied voltage for one
input/output (typical values)
Figure 7.
Relative variation of leakage
current versus junction
temperature
C(pF)
I (T )
R
j
1E+03
I (T =25°C)
R
j
Tj=25°C
F=1MHz
5E+3
1E+3
ITA6V5B1
VR=VRM
1E+2
1E+1
1E+0
1E-1
ITA10B1
ITA18B1
ITA25B1
T (°C)
j
V (V)
1E+02
R
0
25
50
75
100
125
150
1E+00
1E+01
1E+02
3/7
Application information
ITAxxB1
2
Application information
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 3).
Table 3.
Maximum differential voltages
Order code
Maximum differential voltage between two input pins at 25 °C
ITA6V5B1
ITA10B1
ITA18B1
ITA25B1
3.5 V
5.0 V
9.0 V
12.5 V
Figure 8.
RS-232 junction (typical application)
TX
RX
RTS
CTS
GND
3
Ordering information scheme
Figure 9.
Ordering information scheme
ITA 25
B
1
RL
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
4/7
ITAxxB1
Package information
4
Package information
●
Epoxy meets UL94, V0
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a lead-free second level interconnect. The category of
second level interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com.
Table 4.
SO-8 dimensions
Dimensions
Millimeters
Min. Typ. Max. Min. Typ. Max.
ccc C
Ref.
Inches
A
A2
A1
e
b
A
1.75
0.069
0.010
A1
0.1
0.25 0.004
0.049
C
h x 45°
(Seating
Plane)
A2 1.25
0.25mm
(Gage Plane)
b
C
D
E
0.28
0.17
0.48 0.011
0.23 0.007
0.019
0.009
C
L
k
4.80 4.90 5.00 0.189 0.193 0.197
5.80 6.00 6.20 0.228 0.236 0.244
L1
D
E1 3.80 3.90 4.00 0.150 0.154 0.157
e
h
1.27
0.050
0.25
0.40
0.50 0.010
1.27 0.016
0.020
0.050
8
5
4
L
E
E1
L1
k°
ccc
1.04
0.041
1
0
8
0
8
0.10
0.004
Figure 10. SO-8 footprint (dimensions in mm)
6.7
0.54
4.03
1.27
1.335
5/7
Ordering Information
ITAxxB1
5
Ordering Information
Table 5.
Order code
ITA6V5B1
Ordering information
Marking
Package
Weight Base qty Delivery mode
6V5B1
6V5B1
10B1
18B1
18B1
25B1
25B1
2000
2500
2000
2000
2500
2000
2500
Ammopack
Tape and reel
Ammopack
ITA6V5B1RL
ITA10B1
ITA18B1
SO-8
0.08 g
Ammopack
ITA18B1RL
ITA25B1
Tape and reel
Ammopack
ITA25B1RL
Tape and reel
6
Revision history
Table 6.
Date
Document revision history
Revision
Description of changes
13-Dec-2004
1
First issue.
Reformatted to current standards.
SO-8 package dimensions update.
15-Nov-2007
2
Updated pulse waveform parameters in Figure 2.
6/7
ITAxxB1
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