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
6/8/08
1.2
3.0
4.0
3.0
3.35
7.0
6.0
0.5
0.5
7.62
1
24
3
0.26
13°
Max
2.54
LOW INPUT CURRENT
PHOTOTRANSIST OR
OPTICALLY COUPLED ISOLAT ORS
APPROVALS
zUL recognised, File No. E91231
Package Code " EE "
'X' SPECIFICATION APPROV ALS
zVDE 0884 in 3 available lead form :-
- STD
- G form
- SMD approved to CECC 00802
zCertified to EN60950 by :-
Nemko - Certificate No. P01102465
DESCRIPTION
The SFH618 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
zOptions :-
10mm lead spread - add G after part no.
Surface mount - add SM after part no.
Tape&reel - add SMT&R after part no.
zLow input current 0.5mA IF
zHigh Current Transfer Ratios (63-320% at
1mA, 32% min at 0.5mA)
zHigh Isolation Voltage (5.3kVRMS ,7.5kVPK )
zHigh BVCEO (55V min)
zAll electrical parameters 100% tested
zCustom electrical selections available
APPLICATIONS
zComputer terminals
zIndustrial systems controllers
zMeasuring instruments
zSignal transmission between systems of
different potentials and impedances
5.08
4.08
DB92370
10.16
0.26
7.62
OPTION SM
SURFACE MOUNT OPTION G
10.46
9.86
0.6
0.1 1.25
0.75
Dimensions in mm
SFH618A-2X, SFH618A-3X, SFH618A-4X,
SFH618-2, SFH618-3, SFH618-4
Input Forward Voltage (VF) 1.5 V IF = 5mA
Reverse Current (IR)10μAV
R = 6V
Output Collector-emitter Breakdown (BVCEO)55 V I
C = 1mA
( Note 2 )
Emitter-collector Breakdown (BVECO) 6 V I
E = 100μA
Collector-emitter Dark Current (ICEO) 200 nA VCE = 10V
Coupled Current Transfer Ratio (CTR) (Note 2)
SFH618-2 63 125 % 1mA IF , 0.5V VCE
SFH618-2 32 % 0.5mA IF , 1.5V VCE
SFH618-3 100 200 % 1mA IF , 0.5V VCE
SFH618-3 50 % 0.5mA IF , 1.5V V CE
SFH618-4 160 320 % 1mA IF , 0.5V VCE
SFH618-4 80 % 0.5mA IF , 1.5V VCE
Collector-emitter Saturation Voltage VCESAT
SFH618-2 0.4 V 1mA IF , 0.32mA IC
SFH618-3 0.4 V 1mA IF , 0.5mA IC
SFH618-4 0.4 V 1mA IF , 0.8mA IC
Input to Output Isolation Voltage V ISO 5300 VRMS See note 1
7500 VPK See note 1
Input-output Isolation Resistance RISO 5x1010 ΩVIO = 500V (note 1)
Output Rise Time, tr 4 1 8 μSV
CE = 2V , IC = 2mA
Output Fall Time, tf 3 1 8 μSR
L = 100Ω
DB92370m-AAS/A4
6/8/08
PARAMETER MIN TYP MAX UNITS TEST CONDITION
ELECTRICAL CHARACTERISTICS ( TA = 25°C Unless otherwise noted )
Note 1 Measured with input leads shorted together and output leads shorted together.
Note 2 Special Selections are available on request. Please consult the factory.
ABSOLUTE MAXIMUM RATINGS
(25°C unless otherwise specified)
Storage T emperature -55°C to + 125°C
Operating Temperature -30°C to + 100°C
Lead Soldering Temperature
(1/16 inch (1.6mm) from case for 10 secs) 260°C
INPUT DIODE
Forward Current 50mA
Reverse V oltage 6V
Power Dissipation 70mW
OUTPUT TRANSISTOR
Collector-emitter V oltage BVCEO 55V
Emitter-collector V oltage BVECO 6V
Collector Current 50mA
Power Dissipation 150mW
POWER DISSIPATION
T otal Power Dissipation 200mW
(derate linearly 2.67mW/°C above 25°C)
DB92370m-AAS/A4
6/8/08
50
-30 0 25 50 75 100 125
Ambient temperature TA ( °C )
150
0
200
Ambient temperature TA ( °C )
Collector power dissipation PC (mW)
60
30
20
10
0
40
50
-30 0 25 50 75 100 125
Collector Power Dissipation vs. Ambient Temperature
Forward Current vs. Ambient Temperature
-30 0 25 50 75 100
Ambient temperature TA ( °C )
Collector-emitter voltage VCE ( V )
Collector-emitter saturation voltage VCE(SAT) (V)
Collector-emitter Saturation
Voltage vs. Ambient Temperature
100
TA = 25°C
0
0.8
1.2
1.6
2.0
0
0.04
0.08
0.12
0.16
0.20
0.24
0.28
Forward current IF (mA)
0 0.2 0.4 0.6 0.8 1.0
Collector current IC (mA)
Relative current transfer ratio
Current Transfer Ratio vs. Forward Current
(normalized to SFH618-2 & SFH618-3)
Forward current IF (mA)
Current transfer ratio CTR (%)
0
40
60
80
100
0
0.5
1.0
IF = 0.5mA
IF = 1mA
0.4
0.1 0.2 0.5 1 2 5
120
20
IF = 1mA
IC = 0.5mA
1.5 IF = 1mA
VCE = 0.5V
-30 0 25 50 75 100
Ambient temperature TA ( °C )
Relative Current Transfer Ratio
vs. Ambient Temperature
VCE = 0.5V
TA = 25 °C
Collector Current vs. Low Collector-emitter
Voltage (normalized to SFH618-2 & SFH618-3)
