OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.

OPTEK Technology Inc. —

1645 Wallace Drive, Carrollton, Texas 75006

Phone: (972) 323-2200 or (800) 341-4747

FAX: (972) 323-2396 sensors@optekinc.com www.optekinc.com

Issue A.3

11/09

Page 1 of 5

Hi-Reliability Optically Coupled Isolator

3C91C, 3C92C, 3N243, 3N244, 3N245, 3N261, 3N262, 3N263

(TX, TXV)

Description:

Each device is a high reliability optically coupled isolator that consists of an infrared emitting diode and a NPN

silicon phototransistor which are mounted in a hermetically sealed TO-72 package. The 3C91C and 3C92C have

a 935 nm wavelength, whereas the 3N243, 3N244, 3N245, 3N261, 3N262 and 3N263 have an 880 nm

wavelength. All devices have 0.50” (12.70 mm) leads. Electrical characteristics vary. The 3N261TX, 3N262TX

and 3N263TX devices are similar to JEDEC registered optically coupled isolators.

TX and TXV devices are processed to OPTEK’s military screening program patterned after MIL-PRF-19500.

Please refer to Application Bulletins 208 and 210 for additional design information and reliability (degradation) data.

Contact your local representative or OPTEK for more information.

Features:

Part

Number

LED

Peak

Wavelength

Sensor

Isolation

Voltage

(,000)

CTR

Min / Max

Typ / Max

Typ /

Max

Lead

Length

3C91C (TX, TXV)

935 nm

Transistor

1

10 / 50

10 / 50

0.50"

3C92C (TX, TXV)

3N243 (TX, TXV)

880 nm

0.15 / NA

3 / 40

10 / 30

3N244 (TX, TXV)

0.3 / NA

3N245 (TX, TXV)

0.6 / NA

3N261 (TX, TXV)

.05 / NA

1 / 40

5 / 30

3N262 (TX, TXV)

1.0 / 5.0

3N263 (TX, TXV)

2.0 / 10.0

0.3 / 2.0

Pin #

3C91

3C92

3N2XX

1

Cathode

Cathode

Emitter

2

Collector

Emitter

Cathode

3

Emitter

Collector

Collector

4

Anode

Anode

Anode

Applications:

between input and output

environments

DIMENSIONS ARE IN:

INCHES

[ MILLIMETERS]

4

2

3

1

3C91

4

3

2

1

3C92

4

3

1

2

3N2XX

Phototransistor Collector is connected to the Header-Base-Case for ALL versions

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