SFH628A-2, SFH628A-3,
SFH628A-4
LOW INPUT CURRENT
PHOTOTRANSISTOR
OPTICALLY COUPLED ISOLATORS
APPROVALS
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UL recognised, File No. E91231
'X' SPECIFICATION APPROVALS
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VDE 0884 approval pending
DESCRIPTION
The SFH628A series of optically coupled
isolators consist of inverse parallel infrared light
emitting diodes and NPN silicon photo
transistors in space efficient dual in line plastic
packages.
FEATURES
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Options :-
10mm lead spread - add G after part no.
Surface mount - add SM after part no.
Tape&reel - add SMT&R after part no.
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Low input current ±0.5mA I
F
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High Current Transfer Ratios
(63-500% at ±1mA, 32% min at ±0.5mA)
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High Isolation Voltage (5.3kV
RMS
,7.5kV
PK
)
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High BV
CEO
(55V min)
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All electrical parameters 100% tested
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Custom electrical selections available
APPLICATIONS
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Computer terminals
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Industrial systems controllers
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Measuring instruments
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Signal transmission between systems of
different potentials and impedances
1.2
5.08
4.08
2.54
7.0
6.0
1
2
Dimensions in mm
4
3
7.62
4.0
3.0
0.5
13°
Max
0.26
3.0
0.5
3.35
ABSOLUTE MAXIMUM RATINGS
(25°C unless otherwise specified)
Storage Temperature
-55°C to + 125°C
Operating Temperature
-55°C to + 100°C
Lead Soldering Temperature
(1/16 inch (1.6mm) from case for 10 secs) 260°C
INPUT DIODE
Forward Current
Power Dissipation
OUTPUT TRANSISTOR
Collector-emitter Voltage BV
CEO
Emitter-collector Voltage BV
ECO
Power Dissipation
55V
6V
150mW
±50mA
70mW
OPTION SM
SURFACE MOUNT
OPTION G
7.62
POWER DISSIPATION
Total Power Dissipation
200mW
1.2
0.6
10.2
9.5
(derate linearly 2.67mW/°C above 25°C)
1.4
0.9
0.26
10.16
ISOCOM COMPONENTS LTD
Unit 25B, Park View Road West,
Park View Industrial Estate, Brenda Road
Hartlepool, Cleveland, TS25 1YD
Tel: (01429) 863609 Fax :(01429) 863581
31/7/97
DB92514-AAS/A1
ELECTRICAL CHARACTERISTICS ( T
A
= 25°C Unless otherwise noted )
PARAMETER
Input
Output
Forward Voltage (V
F
)
Collector-emitter Breakdown (BV
CEO
)
55
( Note 2 )
Emitter-collector Breakdown (BV
ECO
)
6
Collector-emitter Dark Current (I
CEO
)
Current Transfer Ratio (CTR) (Note 2)
SFH628A-2
SFH628A-2
SFH628A-3
SFH628A-3
SFH628A-4
SFH628A-4
Collector-emitter Saturation Voltage V
CESAT
SFH628A-2
SFH628A-3
SFH628A-4
Input to Output Isolation Voltage V
ISO
Input-output Isolation Resistance R
ISO
5300
7500
5x10
10
63
32
100
50
160
80
MIN TYP MAX UNITS
1.5
V
V
V
nA
TEST CONDITION
I
F
= ±5mA
I
C
= 1mA
I
E
= 100µA
V
CE
= 10V
±1mA I
F
, 0.5V V
CE
±0.5mA I
F
, 1.5V V
CE
±1mA I
F
, 0.5V V
CE
±0.5mA I
F
, 1.5V V
CE
±1mA I
F
, 0.5V V
CE
±0.5mA I
F
, 1.5V V
CE
±1mA I
F
, 0.5mA I
C
±1mA I
F
, 0.8mA I
C
±1mA I
F
, 1.25mA I
C
See note 1
See note 1
V
IO
= 500V (note 1)
200
Coupled
200
320
500
%
%
%
%
%
%
0.4
0.4
0.4
V
V
V
V
RMS
V
PK
Ω
Note 1
Note 2
Measured with input leads shorted together and output leads shorted together.
Special Selections are available on request. Please consult the factory.
SWITCHING CHARACTERISTICS
I
C
= 2mA, V
CC
= 5V, R
L
= 100Ω
,
T
A
= 25°C
(Fig
1)
UNITS
Turn-on Time
Rise Time
Turn-off Time
Fall Time
t
on
t
r
t
off
t
f
6.0
3.5
5.5
5.0
µs
µs
µs
µs
V
CC
Input
R
L
= 100Ω
Output
Output
10%
t
r
t
f
t
on
t
off
10%
90%
90%
FIG 1
31/7/97
DB92514-AAS/A1
Collector Power Dissipation vs. Ambient Temperature
200
Collector power dissipation P
C
(mW)
Collector Current vs. Low Collector-emitter
Voltage (normalized to SFH628A-2 & SFH628A-3)
2.0
T
A
= 25°C
150
Collector current I
C
(mA)
1.6
I
F
= ±1mA
1.2
0.8
I
F
= ±0.5mA
0.4
0
100
50
0
-30
0
25
50
75
100
125
Ambient temperature T
A
( °C )
Forward Current vs. Ambient Temperature
60
Relative current transfer ratio
Forward current I
F
(±mA)
50
40
30
20
10
0
-30
0
25
50
75
100
125
Ambient temperature T
A
( °C )
Collector-emitter Saturation
Voltage vs. Ambient Temperature
0.28
Current transfer ratio CTR (%)
0.24
0.20
0.16
0.12
0.08
0.04
0
-30
0
25
50
75
100
Ambient temperature T
A
( °C )
31/7/97
0
0.2
0.4
0.6
0.8
1.0
Collector-emitter voltage V
CE
( V )
Relative Current Transfer Ratio
vs. Ambient Temperature
1.5
I
F
= ±1mA
V
CE
= 0.5V
1.0
0.5
0
-30
0
25
50
75
100
Ambient temperature T
A
( °C )
Current Transfer Ratio vs. Forward Current
(normalized to SFH628A-2 & SFH628A-3)
120
100
80
60
40
20
0
0.1
0.2
0.5
1
2
5
Forward current I
F
(±mA)
DB92514-AAS/A1
Collector-emitter saturation voltage V
CE(SAT)
(V)
I
F
= ±1mA
I
C
= 0.5mA
V
CE
= 0.5V
T
A
= 25 °C
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