DA108S1
DA112S1
Diode array
Features
■
Array of 8 or 12 diodes
■
Low input capacitance
■
Suitable for digital line protection
Complies with following standards:
■
IEC 61000-4-2 Level 4
– 15kV (air discharge)
– 8kV (contact discharge)
SO-8
Figure 1.
Functional diagram: DA108S1
Applications
■
Protection of logic side of ISDN S-interface
■
Protection of I/O lines of microcontroller
■
Signal conditioning
I/O1
REF1
I/O2
REF2
Description
I/O3
REF3
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.
I/O4
REF4
As maximum voltage of each diode is 18 V,
maximum input voltage range between two I/Os is
either 0 V to 18 V (REF1 = 0 V and REF2 =
+18 V) or -9 V to +9 V (REF1 = -9 V and REF2 =
+9 V)
Figure 2.
January 2008
Rev 6
Functional diagram: DA112S1
I/O1 1
8
REF1
I/O2
2
7
I/O6
I/O3
3
6 REF2
I/O4
4
5 I/O5
1/8
www.st.com
Characteristics
DA108S1 / DA112S1
1
Characteristics
Table 1.
Absolute maximum ratings (Tamb = 25 °C)
Symbol
Value
Unit
18
V
12
A
0.73
W
Storage temperature range
-55 to +150
°C
Tj
Operating junction temperature range
-55 to +150
°C
TL
Maximum lead temperature for soldering during 10 s.
260
°C
VRRM
IPP
P
Parameter
Repetitive peak reverse voltage (for one single diode)
Repetitive peak forward current
(1)
tp = 8/20 µs
Power dissipation
Tstg
1. The surge is repeated after the device returns to ambient temperature
Table 2.
Thermal resistance
Symbol
Rth (j-a)
Table 3.
Parameter
Junction to ambient
2/8
Unit
170
°C/W
Max.
Unit
1.
Electrical characteristics(Tamb = 25 °C)
Symbol
VFP
Value
Parameter
Peak forward voltage
IPP = 12 A,
tp = 8/20 µs
DA108S1
9
DA112S1
12
V
VF
Forward voltage
IF = 50 mA
1.2
V
IR
Reverse leakage current
VR = 15 V
2
µA
DA108S1 / DA112S1
Characteristics
Figure 3.
Input capacitance
VCC connected between REF1 and REF2
36
Input applied :
DC bias + 950 mV(RMS) at 1 MHZ
C (pF)
Typical values
34
VCC= 5 V
VCC= 15 V
32
REF2
30
28
I/O
26
V CC
G
24
22
REF1
0
2
4
6
8
10
12
14
16
DC bias (V)
Figure 4.
Typical peak forward voltage characteristics (8/20 µs pulse)
VF (V)
Typical values
2.0
1.8
1.6
o
Tj = 25 C
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0.001
0.01
0.1
I F (A)
1
VF (V)
10.0
9.0
o
Tj = 25 C
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
1
Typical values
I F (A)
10
20
3/8
Characteristics
Figure 5.
DA108S1 / DA112S1
Application 1: ISDN interface protection, residual lightning surges at
transformer secondary are suppressed by DA108S1
Vcc
LOGIC SIDE
LINE SIDE
A
GND
Vcc
Vss
TPIxx
B
Vcc
Vss
A
GND
Vss
Vcc
TPIxx
B
Vss
DA1xx S1
Figure 6.
Application 2: microcontroller I/O port protection
Vcc
Vcc
4-6 bit input port
I/O
Vcc
I/O
μc
Vcc
I/O
Vcc
I/O
DA1xx S1
Note:
4/8
IMPORTANT : DA108S1 must be connected to the reference voltages through REF1 and
REF2.
DA108S1 / DA112S1
2
Ordering information scheme
Ordering information scheme
Figure 7.
Ordering information scheme
DA 1 08 S
1 RL
Diode Array
Version
Number of diodes
08 = 12
12 = 12
Serial
Package
1 = SO-8
Packaging
RL = Tape and reel
Blank = Tube
5/8
Package mechanical data
3
DA108S1 / DA112S1
Package mechanical data
●
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
ccc C
Ref.
A2
e
b
C
(Seating
Plane)
A
Millimeters
Min.
A
A1
0.25mm
(Gage Plane)
L
k
L1
D
Min.
Typ.
1.75
A1
0.1
A2
1.25
0.25
Max.
0.069
0.004
0.010
8
5
E1
E
b
0.28
0.48
0.011
0.019
0.17
0.23
0.007
0.009
D
4.80
4.90
5.00
0.189 0.193 0.197
E
5.80
6.00
6.20
0.228 0.236 0.244
E1
3.80
3.90
4.00
0.150 0.154 0.157
1.27
4
0.050
h
0.25
0.50
0.010
0.020
L
0.40
1.27
0.016
0.050
8
0
L1
1
0.049
C
e
k°
1.04
0
ccc
0.041
0.10
SO-8 footprint dimensions in mm (inches)
6.8
(0.268)
0.6
(0.024)
4.2
(0.165)
1.27
(0.050)
6/8
Max.
h x 45°
C
Figure 8.
Typ.
Inches
8
0.004
DA108S1 / DA112S1
4
Ordering information
Ordering information
Figure 9.
Ordering information
Order codes
Marking
Package
Weight
Base qty
Delivery mode
100
Tube
2500
Tape and reel(1)
100
Tube
2500
Tape and reel(1)
DA108S1
DA108S
DA108S1RL
SO-8
0.11 g
DA112S1
DA112S
DA112S1RL
1. Prefered packaging is tape and reel
5
Revision history
Figure 10. Revision history
Date
Revision
Aug-2001
4
Previous release.
15-Feb-2007
5
Reformatted to current standard.
Standard typing error corrected.
6
Reformatted to current standards. Added paragraph on maximum
input voltage range to Description. Parameters updated in Table 1.
Added Pin 1 marker to package illustration. Added Figure 8: SO-8
footprint dimensions in mm (inches).
15-Jan-2008
Changes
7/8
DA108S1 / DA112S1
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8/8
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