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Document Number: 83616
328 Rev. 1.9, 08-May-08
IL215AT/216AT/217AT
Vishay Semiconductors
Optocoupler, Phototransistor Output,
Low Input Current, with Base Connection
Fig. 11 - Collector Base Photocurrent vs. LED Current
Fig. 12 - High to Low Propagation Delay vs.
LED Current and Load Resistor
Fig. 13 - Low to High Propagation Delay vs.
LED Current and Load Resistor
Fig. 14 - Normalized Non-Saturated h
FE
vs.
Base Current and Temperature
Fig. 15 - Typical Switching Characteristics vs.
Base Resistance (Saturated Operation)
Fig. 16 - Typical Switching Times vs. Load Resistance
iil215at_11
0.01 0.1 1 10
100
1000
0.1
1
10
100
1000
I
F
- LED Current (mA)
I
cb
- Collector Base
photocurrent (µA)
V
cb
= 9.3 V
iil215at_12
10 15 20
0
5
10
15
20
10 kΩ
I
F
- LED Current (mA)
t
pHL
- High Low Propagation
Delay (µs)
2 kΩ
4.7 kΩ
V
cc
= 5 V
V
th
= 1.5 V
0
5
80
iil215at_13
10 15 20
0
20
40
60
10 kΩ
4.7 kΩ
2 kΩ
t
pLH
- Low High Propagation
Delay (µs)
V
cc
= 5 V,V
th
= 1.5 V
0
5
iil215at_14
1000
0.4
0.6
0.8
1.0
1.2
I
b
- Base Current (µA)
Nh
FE
- Normalized h
FE
- 20 °C
25 °C
50 °C
70 °C
Normalized to:
I
b
= 20 µA
V
ce
= 10 V
10
100
1
iil215at_15
100
50
10
5
1.0
Input:
= 10 mA
Pulse width = 100 mS
Duty cycle = 50 %
Base Emitter Resistance, R
BE
(W)
T
O
FF
T
ON
Switching Time (µs)
10K 50K
100K 500K 1M
I
F
iil215at_16
1000
500
100
50
10
5
1
0.1 0.5 1 10 50 100
Input:
I
F
= 10 mA
Pulse with = 100 mS
Duty cycle = 50 %
T
OFF
T
ON
Load Resistance R
L
(kΩ)
Switching Time (µs)
5
