4N25 4N25A 4N26 4N27 4N28

4

Motorola Optoelectronics Device Data

100

70

50

20

10

7

5

2

1

0.1

0.2

0.5 0.7 1

2

5 7 10

20

50 70 100

IF, LED INPUT CURRENT (mA)

RL = 1000

100

10

100

70

50

20

10

7

5

2

1

0.1

0.2

0.5 0.7 1

2

5 7 10

20

50 70 100

IF, LED INPUT CURRENT (mA)

RL = 1000

100

10

Figure 7. Turn–On Switching Times

(Typical Values)

Figure 8. Turn–Off Switching Times

(Typical Values)

VCC = 10 V

VCC = 10 V

6

6

µA

Figure 9. DC Current Gain (Detector Only)

Figure 10. Capacitances versus Voltage

20

18

16

14

12

10

8

4

2

0

CCE

f = 1 MHz

0.05

0.1

0.2

0.5

1

2

5

10

20

50

V, VOLTAGE (VOLTS)

CLED

CCB

CEB

5

µA

4

µA

3

µA

2

µA

1

µA

4

3

2

1

0

2

4

6

8

10

12

14

16

18

20

VCE, COLLECTOR–EMITTER VOLTAGE (VOLTS)

IB = 7 µA

IF = 0

TEST CIRCUIT

VCC = 10 V

IF = 10 mA

INPUT

RL = 100 Ω

OUTPUT

WAVEFORMS

10%

90%

ton

INPUT PULSE

OUTPUT PULSE

tf

toff

tr

Figure 11. Switching Time Test Circuit and Waveforms