ISOCOM IS121 Datasheet

IS121

22/4/02

HIGH DENSITY MOUNTING
PHOTOTRANSISTOR

OPTICALLY COUPLED ISOLATORS

DESCRIPTION

The IS121 is an optically coupled isolator
consisting of an infrared light emitting diode and
NPN silicon photo transistor in a space efficient
dual in line plastic package.

FEATURES

l Marked as FPT1.

l Current Transfer Ratio MIN. 50%

l Isolation Voltage (3.75kV

l All electrical parameters 100% tested

l Drop in replacement for Toshiba TLP121

RMS

,5.3kV

)

PK

APPLICATIONS

l Computer terminals

l Industrial systems controllers

l Measuring instruments

l Signal transmission between systems of

different potentials and impedances

Dimensions in mm

ISOCOM COMPONENTS LTD

Unit 25B, Park View Road West,

Park View Industrial Estate, Brenda Road

Hartlepool, Cleveland, TS25 1YD

Tel: [phone] Fax :[phone]

ISOCOM INC

1024 S. Greenville Ave, Suite 240,

Allen, TX 75002 USA

Tel: [phone] Fax: [phone]

e-mail [e-mail]

http://www.isocom.com

DB92843l-AAS/A3

ABSOLUTE MAXIMUM RATINGS

22/4/02

(25°C unless otherwise specified)

Storage Temperature -40°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 Voltage 6V
Power Dissipation 70mW

OUTPUT TRANSISTOR

Collector-emitter Voltage BV
Emitter-collector Voltage BV
Power Dissipation 150mW

CEO

ECO

35V
6V

POWER DISSIPATION

Total Power Dissipation 170mW

(derate linearly 2.26mW/°C above 25°C)

ELECTRICAL CHARACTERISTICS ( TA = 25°C Unless otherwise noted )

PARAMETER MIN TYP MAX UNITS TEST CONDITION

Input Forward Voltage (VF) 1.2 1.4 V IF = 20mA

Reverse Voltage (VR) 4 V IR = 10µA
Reverse Current (IR) 10 µA VR = 4V

Output Collector-emitter Breakdown (BV

Emitter-collector Breakdown (BV
Collector-emitter Dark Current (I

) 35 V IC = 0.1mA

CEO

) 6 V IE = 10µA

ECO

) 100 nA VCE = 20V

CEO

Coupled Current Transfer Ratio (CTR) 50 600 % 5mA IF , 5V V

Optional CTR Grades: IS121A 80 160 % 5mA I

IS121B 130 260 % 5mA I
IS121C 200 400 % 5mA I
IS121D 300 600 % 5mA I

, 5V V

F

, 5V V

F

, 5V V

F

, 5V V

F

CE

CE
CE
CE
CE

Collector-emitter Saturation VoltageVCE

Input to Output Isolation Voltage V

Input-output Isolation Resistance R

(SAT)

3750 V

ISO

5300 V

10

5x10

ISO

0.2 V 20mA IF , 1mA I

RMS
PK

Ω V

Output Rise Time tr 4 18 µs VCE = 2V ,
Output Fall Time tf 3 18 µs IC = 2mA, RL = 100Ω

Note 1 Measured with input leads shorted together and output leads shorted together.

See note 1
See note 1

= 500V (note 1)

IO

DB92843l-AAS/A3

C