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DA108S1
DA112S1
SO-8
s
ARRAY OF 8 OR 12 DIODES
s
LOW INPUT CAPACITANCE
s
SUITABLE FOR DIGITAL LINE PROTECTION
FEATURES
ARRAY of 8 or 12 diodes configured by cells of 2
diodes, each cell being used to protect signal line
from transient overvoltages by clamping action.
DESCRIPTION
1
2
3
4
I/O 1
I/O 2
I/O 3
I/O 4
8
7
6
5
REF 2
REF 1
REF 2
REF 1
FUNCTIONAL DIAGRAM : DA108S1
August 2001 - Ed:4
DIODE ARRAY
Application Specific Discretes
A.S.D.
TM
1
2
3
4
I/O 1
I/O 2
I/O 3
I/O 4
8
7
6
5
I/O 5
REF 2
I/O 6
REF 1
FUNCTIONAL DIAGRAM : DA112S1
Protection of logic side of ISDN S-interface.
Protection of I/O lines of microcontroller.
Signal conditioning.
APPLICATION
IEC1000-4-22 level 4:
15kV (air discharge)
8kV (contact discharge)
COMPLIES WITH FOLLOWING STANDARDS :
DA108S1 / DA112S1
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Symbol
Parameter
Value
Unit
V
RRM
Repetitive peak reverse voltage (for one single diode)
18
V
I
PP
Repetitive peak forward current *
8/20
s
12
A
P
Power dissipation
0.73
W
Tstg
Tj
Storage temperature range
Maximum operating junction temperature
- 55 to + 150
150
C
T
L
Maximum lead temperature for soldering during 10s.
260
C
* The surge is repeated after the device returns to ambient temperature
ABSOLUTE MAXIMUM RATINGS (T
amb
= 25C)
Symbol
Parameter
Value
Unit
R
th (j-a)
Junction to ambient
170
C/W
THERMAL RESISTANCES
Symbol
Parameter
Max.
Unit
V
FP
Peak forward voltage
I
PP
= 12A, 8/20
s
DA108S1
DA112S1
9
12
V
V
F
Forward voltage
I
F
= 50 mA
1.2
V
I
R
Reverse leakage current
V
R
= 15V
2
A
ELECTRICAL CHARACTERISTICS (T
amb
= 25C)
DA108S1 / DA112S1
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Fig.2 : Typical peak forward voltage characteristics (8/20
s pulse)
V
F
(V)
0.001
0.01
0.1
1
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
Tj = 25 C
o
I
F
(A)
Typical values
V
F
(V)
1
10
20
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
Typical values
I
F
(A)
Tj = 25 C
o
22
24
26
28
30
32
34
36
2
4
6
8
10 12 14 16
0
C (pF)
G
I/O
V
CC
REF2
REF1
DC bias (V)
V = 5 V
CC
V = 15 V
CC
Typical values
V connected between REF1 and REF2
Input applied :
DC bias + 950 mV at 1 MHZ
CC
(RMS)
Fig.1 : Input capacitance
DA108S1 / DA112S1
4/5
APPLICATION 1 : ISDN Interface Protection
Residual lightning surges at transformer secondary are suppressed by DA108S1
DA1x S1
x
4-6 bit input port
Vcc
Vcc
Vcc
Vcc
Vcc
I/O
I/O
I/O
I/O
c
APPLICATION 2 : Microcontroller I/O port protection
IMPORTANT : DA108S1 must imperatively be connected to the reference voltages by REF1 and REF2.
DA108S1 / DA112S1
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PACKAGE MECHANICAL DATA
SO-8 (Plastic)
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 ap-
proval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
2001 STMicroelectronics - Printed in Italy - All rights reserved.
STMicroelectronics GROUP OF COMPANIES
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http://www.st.com
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 : Preference packaging is tape and reel.
DA108S1
DA108S
DA112S1
DA112S
MARKING : Logo, Data Code,
DA1 08 S 1 RL
Diode Array
Number of diodes
Serial
Package: SO-8 plastic
Packaging:
RL = Tape & reel
= Tube
ORDER CODE
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