www.vishay.com

4

Document Number 83641

Rev. 1.4, 26-Oct-04

IL755/ ILD755

Vishay Semiconductors

LED Current

Current

Figure 5. Normalized Non-Saturated and Saturated Collector-

Emitter Current vs. LED Current

iil755_03

100

10

1

.1

0.0

0.5

1.0

1.5

2.0

2.5

3.0

Vce=1V

Vce=5V

IF - LED Current - mA

Normalized to:

Vce=5V

IF = 2 mA

iil755_04

100

1

.1

.01

.1

1

10

100

Vce=1V

Vce=5V

IF - LED Current - mA

IF = 2 mA

Vce = 5 V

Normalized to:

10

iil755_05

100

1

.1

.001

.01

.1

1

10

Vce=1V

Vce=5V

IF - LED Current - mA

IF = 10 mA

Vce=5V

Normalized to:

10

Figure 6. Non-Saturated and Saturated HFE vs. Base Current

Figure 7. Low to High Propagation Delay vs. Collector Load

Resistance and LED Current

Figure 8. High to low Propagation Delay vs. Collector Load

Resistance and LED Current

iil755_06

.01

.1

1

10

100

0

2000

4000

6000

8000

10000

Vce = 5 V

Vce=1V

Ib - Base Current -

µA

iil755_07

0

5

10

15

20

0

20

40

60

80

Vcc = 5V

Vth = 1.5 V

220

Ω

ıˇ

470

Ω

IF - LED Current - mA

100

Ω

1.0 k

Ω

iil755_08

0

5

10

15

20

0

5

10

15

20

100

Ω

1k

Ω

IF - LED Current - mA

Vcc = 5 V

Vth = 1.5 V