Document Number: 83620

For technical questions, contact: optocoupler.answers@vishay.com

www.vishay.com

Rev. 1.8, 08-Jan-08

1

Optocoupler, Phototransistor Output,

AC Input, with Base Connection

IL256AT

Vishay Semiconductors

DESCRIPTION

The IL256AT is an AC input phototransistor optocoupler. The

device consists of two infrared emitters connected in reverse

parallel and coupled to a silicon NPN phototransistor

detector.

These circuit elements are constructed with a standard

SOIC-8 foot print.

The product is well suited for telecom applications such as

ring detection or off/on hook status, given its bidirectional

LED input and guaranteed current transfer ratio (CTR)

FEATURES

• Guaranteed CTR symmetry, 2:1 maximum

• Bidirectional

AC

input

industry

standard

SOIC-8 Surface mountable package

• Standard lead spacing, 0.05"

• Available only on tape and reel (conform to EIA

standard RS481A)

• Lead (Pb)-free component

• Component in accordance to RoHS 2002/95/EC and

WEEE 2002/96/EC

APPLICATIONS

• Telecom applications ring detection

AGENCY APPROVALS

• UL1577, file no. E52744 system code Y

• CUL - file no. E52744, equivalent to CSA bulletin 5A

• DIN EN 60747-5-2 (VDE 0884) available with option 1

Note

Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. Functional operation of the device is not implied

at these or any other conditions in excess of those given in the operational sections of this document. Exposure to absolute maximum ratings for

extended periods of the time can adversely affect reliability.

i179025

A/C

NC

B

C

E

1

2

3

4

8

7

6

5

NC

NC

C/A

ORDER INFORMATION

PART

REMARKS

IL256AT

CTR > 20 %, tape and reel, SOIC-8

ABSOLUTE MAXIMUM RATINGS

PARAMETER

TEST CONDITION

SYMBOL

VALUE

UNIT

INPUT

Forward continuous current

60

mA

Power dissipation

90

mW

Derate linearly from 25 °C

0.8

mW/°C

OUTPUT

Collector-emitter breakdown voltage

30

V

Emitter-collector breakdown voltage

5V

Collector-base breakdown voltage

70

V

Power dissipation

150

mW

Derate linearly from 25 °C

2.0

mW/°C

COUPLER

Isolation voltage, input to output

4000

Total package dissipation

(LED and detector)

240

mW

Derate linearly from 25 °C

3.2

mW/°C

Storage temperature

- 55 to + 150

°C

Operating temperature

- 55 to + 100

°C

Soldering time at 260 °C

10

s