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DESCRIPTION
The IS281 is an optically coupled isolator consisting of
an infrared light emitting diode and an NPN silicon
photo transistor. It belongs to Isocom’s Compact
range of opto-couplers. It has been specially selected
to give a higher guaranteed CTR
FEATURES
• Low profile package ( half pitch )
• AC Isolation test voltage 3750VRMS
• Low coupling capacitance typically 0.3pF
• CTR > 100%
• Wide temperature range
• Lead free
APPLICATIONS
• Power Supply Feedback Voltage/Current
• Industrial system controllers
• Measuring instruments
• Signal transmission between systems of
different potentials and impedance
ORDER INFORMATION
• Available in Tape and Reel with 3000 pieces
per reel
MARKING INFORMATION
Please note that the device will be marked with the
generic part number “THP1” the date code will also be
marked on the device.
IS281GB ( Compact Range )
ISOCOM
COMPONENTS
ISOCOM COMPONENTS 2004 LTD
Unit 25B, Park View Road West, Park View Industrial Estate
Hartlepool, Cleveland, TS25 1UD, United Kingdom
Tel: +44 (0)1429 863 609 Fax : +44 (0)1429 863 581
e-mail: sales@isocom.co.uk
http://www.isocom.com
ISOCOM COMPONENTS ASIA LTD
Hong Kong Office, 1712-1713
Laurels Industrial Centre, 32 Tai Yau Street,
San Po Kong, Kowloon, Hong Kong.
Tel: +852 2995 9217 Fax : +852 8161 6292
e-mail sales@isocom.com.hk
ABSOLUTE MAXIMUM RATINGS
Input Diode
Forward Current 60mA
Reverse Voltage 6V
Power dissipation 100mW
Output Transistor
Collector to Emitter Voltage 70V
Emitter to Collector Voltage 7V
Collector Current 50mA
Power Dissipation 100mW
Total Package
Isolation test Voltage 3750VRMS
Operating Temperature -40 to 100 C
Storage Temperature -40 to 100 C
DC93103 31/05/2007
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ELECTRICAL CHARACTERISTICS
Ambient Temperature = 25°C unless otherwise specified
INPUT
OUTPUT
COUPLED
Note 1 Measured with input leads shorted together and output leads shorted together
IS281GB ( Compact Range )
ISOCOM
COMPONENTS
DC93103 31/05/2007
Parameter Symbol Test Condition Min Max Unit
Forward Voltage VF IF = 50mA 1.25 V
Reverse Leakage IR VR = 6V 10 µA
Junction Capacitance Cj VR = 0V, f = 1 MHz pF
Typ.
1.25
50
Parameter Symbol Test Condition Min Max Unit
Collector—Emitter
breakdown Voltage BVCEO IC = 100µA 70 V
Emitter—Collector
breakdown Voltage BVECO IE = 100µA 7 V
Collector dark Current ICEO VCE = 20V, IF = 0mA 100 nA
Typ.
Parameter Symbol Test Condition Min Max Unit
Current transfer ratio CTR IF = 5mA, VCE = 5V 100 600 %
Collector—Emitter
saturation Voltage VCEsat IF = 10mA, IC = 1mA 0.3 V
Input to output isola-
tion Voltage VISO See note 1 3750 VRMS
Typ.
Output rise time tr VS =5V,Ic = 2mA, Rl = 100? 3.0 µS
Output fall time tf VS = 5V,Ic = 2mA, Rl = 100? 3.0 µS
Cut off frequency fc IF = 10mA, VCE = 5V,
RL = 100? 100 kHz
Coupling Capacitance Ck f = 1 MHz 0.3 pF
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IS281GB( Compact Range )
ISOCOM
COMPONENTS
DC93103 31/05/2007
4
IS281GB ( Compact Range )
ISOCOM
COMPONENTS
DC93103 31/05/2007
