SFH618A-2, SFH618A-3,
SFH618A-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 SFH618A series of optically coupled
isolators consist of 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
(63-320% 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
-55°C to + 100°C
Operating Temperature
Lead Soldering Temperature
(1/16 inch (1.6mm) from case for 10 secs) 260°C
INPUT DIODE
Forward Current
Reverse Voltage
Power Dissipation
OUTPUT TRANSISTOR
Collector-emitter Voltage BV
CEO
Emitter-collector Voltage BV
ECO
Power Dissipation
55V
6V
150mW
50mA
6V
70mW
OPTION SM
SURFACE MOUNT
OPTION G
7.62
POWER DISSIPATION
Total Power Dissipation
200mW
0.6
0.1
10.46
9.86
(derate linearly 2.67mW/°C above 25°C)
1.25
0.75
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
7/12/00
DB92372m-AAS/A1
ELECTRICAL CHARACTERISTICS ( T
A
= 25°C Unless otherwise noted )
PARAMETER
Input
Forward Voltage (V
F
)
Reverse Voltage (V
R
)
Reverse Current (I
R
)
MIN
TYP MAX UNITS
1.5
6
10
V
V
µ
A
V
V
nA
TEST CONDITION
I
F
= 5mA
I
R
= 10
µ
A
V
R
= 6V
I
C
= 1mA
I
E
= 100
µ
A
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
, 0.32mA I
C
1mA I
F
, 0.5mA I
C
1mA I
F
, 0.8mA I
C
See note 1
See note 1
V
IO
= 500V (note 1)
Output
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)
SFH618A-2
SFH618A-2
SFH618A-3
SFH618A-3
SFH618A-4
SFH618A-4
Collector-emitter Saturation Voltage V
CESAT
SFH618A-2
SFH618A-3
SFH618A-4
Input to Output Isolation Voltage V
ISO
Input-output Isolation Resistance R
ISO
5300
7500
5x10
10
63
32
100
50
160
80
200
Coupled
125
200
320
%
%
%
%
%
%
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
= 100
Ω
,
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
7/12/00
DB92372m-AAS/A1
Collector Power Dissipation vs. Ambient Temperature
200
Collector power dissipation P
C
(mW)
Collector Current vs. Low Collector-emitter
Voltage (normalized to SFH618A-2 & SFH618A-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
50
Forward current I
F
(mA)
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
I
F
= 1mA
I
C
= 0.5mA
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 )
7/12/00
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 SFH618A-2 & SFH618A-3)
120
100
80
60
40
20
0
0.1
0.2
0.5
1
2
5
Forward current I
F
(mA)
DB92372m-AAS/A1
Collector-emitter saturation voltage V
CE(SAT)
(V)
V
CE
= 0.5V
T
A
= 25 °C
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