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
1.2
3.0
4.0
3.0
3.35
7.0
6.0
0.5
0.5
7.62
1
2
4
3
0.26
13°
Max
2.54 Dimensions in mm
LOW INPUT CURRENT
PHOTOTRANSISTOR
OPTICALLY COUPLED ISOLATORS
APPROVALS
lUL recognised, File No. E91231
'X' SPECIFICATION APPROVALS
lVDE 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
lOptions :-
10mm lead spread - add G after part no.
Surface mount - add SM after part no.
Tape&reel - add SMT&R after part no.
lLow input current 0.5mA IF
lHigh Current Transfer Ratios
(63-320% at 1mA, 32% min at 0.5mA)
lHigh Isolation Voltage (5.3kVRMS ,7.5kVPK )
lHigh BVCEO (55V min)
lAll electrical parameters 100% tested
lCustom electrical selections available
APPLICATIONS
lComputer terminals
lIndustrial systems controllers
lMeasuring instruments
lSignal transmission between systems of
different potentials and impedances
5.08
4.08
SFH618A-2, SFH618A-3,
SFH618A-4
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 50mA
Reverse Voltage 6V
Power Dissipation 70mW
OUTPUT TRANSISTOR
Collector-emitter Voltage BVCEO 55V
Emitter-collector Voltage BVECO 6V
Power Dissipation 150mW
POWER DISSIPATION
Total Power Dissipation 200mW
(derate linearly 2.67mW/°C above 25°C)
OPTION G
7.62
SURFACE MOUNT
OPTION SM
10.16
0.26
10.46
9.86
0.6
0.1 1.25
0.75
7/12/00
PARAMETER MIN TYP MAX UNITS TEST CONDITION
Input Forward Voltage (VF)1.5 VIF = 5mA
Reverse Voltage (VR) 6 VIR = 10µA
Reverse Current (IR)10 µAVR = 6V
Output Collector-emitter Breakdown (BVCEO)55 VIC = 1mA
( Note 2 )
Emitter-collector Breakdown (BVECO) 6 VIE = 100µA
Collector-emitter Dark Current (ICEO)200 nA VCE = 10V
Coupled Current Transfer Ratio (CTR) (Note 2)
SFH618A-2 63 125 %1mA IF , 0.5V VCE
SFH618A-2 32 %0.5mA IF , 1.5V VCE
SFH618A-3 100 200 %1mA IF , 0.5V VCE
SFH618A-3 50 %0.5mA IF , 1.5V VCE
SFH618A-4 160 320 %1mA IF , 0.5V VCE
SFH618A-4 80 %0.5mA IF , 1.5V VCE
Collector-emitter Saturation Voltage VCESAT
SFH618A-2 0.4 V1mA IF , 0.32mA IC
SFH618A-3 0.4 V1mA IF , 0.5mA IC
SFH618A-4 0.4 V1mA IF , 0.8mA IC
Input to Output Isolation Voltage VISO 5300 VRMS See note 1
7500 VPK See note 1
Input-output Isolation Resistance RISO 5x1010 ΩVIO = 500V (note 1)
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.
Output
Output
RL = 100Ω
Input
10%
90% 90%
10%
ton
tr
FIG 1
VCC
toff
tf
SWITCHING CHARACTERISTICS
IC = 2mA, VCC = 5V, RL = 100Ω, TA = 25°C (Fig 1)
ton
tr
toff
tf
Turn-on Time
Rise Time
Turn-off Time
Fall Time
µs
µs
µs
µs
6.0
3.5
5.5
5.0
UNITS
DB92372m-AAS/A1
7/12/00
50
-30 0 25 50 75 100 125
Ambient temperature TA ( °C )
150
0
200
Ambient temperature TA ( °C )
Collector power dissipation P C (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 V CE(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 I F (mA)
0 0.2 0.4 0.6 0.8 1.0
Collector current I C (mA)
Relative current transfer ratio
Current Transfer Ratio vs. Forward Current
(normalized to SFH618A-2 & SFH618A-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 SFH618A-2 & SFH618A-3)
DB92372m-AAS/A1
