4N25 4N25A 4N26 4N27 4N28

3

Motorola Optoelectronics Device Data

TYPICAL CHARACTERISTICS

Figure 1. LED Forward Voltage versus Forward Current

2

1.8

1.6

1.4

1.2

1

1

10

100

1000

10

1

0.1

0.01

0.5

1

IF, LED FORWARD CURRENT (mA)

2

5

10

20

50

IF, LED INPUT CURRENT (mA)

25

°C

100

°C

TA = –55°C

NORMALIZED TO:

IF = 10 mA

Figure 2. Output Current versus Input Current

PULSE ONLY

PULSE OR DC

10

7

5

2

1

0.7

0.5

0.2

0.1

–60

–40

–20

0

20

40

60

80

100

TA, AMBIENT TEMPERATURE (°C)

1

10

100

0.1

0

20

40

60

80

100

TA, AMBIENT TEMPERATURE (°C)

100

50

20

10

5

2

1

0.1

0.2

0.5

1

2

5

10

20

50

100

IF, LED INPUT CURRENT (mA)

VCE = 30 V

10 V

tf

tr

tr

tf

0

VCE, COLLECTOR–EMITTER VOLTAGE (VOLTS)

4

8

12

16

20

24

28

5 mA

2 mA

1 mA

0

1

2

3

4

5

6

7

8

9

10

Figure 3. Collector Current versus

Collector–Emitter Voltage

Figure 4. Output Current versus Ambient Temperature

Figure 5. Dark Current versus Ambient Temperature

Figure 6. Rise and Fall Times

(Typical Values)

IF = 10 mA

NORMALIZED TO TA = 25°C

NORMALIZED TO:

VCE = 10 V

TA = 25°C

VCC = 10 V

RL = 1000

RL = 100

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