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4

Document Number 83637

Rev. 1.5, 26-Oct-04

IL55B/ 56B/ MOC8021

Vishay Semiconductors

Figure 3. Normalized Non-Saturated and Saturated Collector-

Emitter Current vs. LED Current

Figure 4. Low to High Propagation Delay vs. Collector Load

Resistance and LED Current

Figure 5. High to low Propagation Delay vs. Collector Load

Resistance and LED Current

iil55b_03

100

1

.1

.001

.01

.1

1

10

Vce=1V

Vce=5V

IF - LED Current - mA

IF =10mA

Vce=5V

Normalized to:

10

iil55b_04

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

iil55b_05

0

5

10

15

20

0

5

10

15

20

100

Ω

1k

Ω

IF - LED Current - mA

VCC =5V

Vth = 1.5 V

Figure 6. Switching Waveform

Figure 7. Switching Schematic

iil55b_06

VO

IF

tS

tR

tF

tD

VTH=1.5 V

tPHL

tPLH

iil55b_07

VO

RL

VCC =13.5 V

IF=50 mA

F=10 KHz,

DF=50%