4N25/ 4N26/ 4N27/ 4N28
Vishay Semiconductors
Switching Characteristics
Parameter
Rise and fall times
Test condition
V
CE
= 10 V, I
F
= 10 mA, R
L
= 100
Ω
Symbol
t
r
, t
f
Min
Typ.
2.0
Max
Unit
µs
Typical Characteristics (Tamb = 25
°C
unless otherwise specified)
1.4
V
F
- Forward Voltage - V
1.5
T
A
= –55°C
T
A
= 25°C
NCTR - Normalized CTR
1.3
1.2
1.1
1.0
0.9
0.8
0.7
.1
i4n25_01
Normalized to:
Vce=10 V, I
F
=10 mA, T
A
=25°C
CTRce(sat) Vce=0.4 V
1.0
T
A
=50°C
0.5
NCTR(SAT)
NCTR
T
A
= 85°C
0.0
1
10
I
F
- Forward Current - mA
100
i4n25_03
.1
1
10
I
F
- LED Current - mA
100
Figure 1. Forward Voltage vs. Forward Current
Figure 3. Normalized Non-saturated and Saturated CTR vs. LED
Current
1.5
NCTR - Normlized CTR
NCTR - Normalized CTR
Normalized to:
Vce=10 V, I
F
=10 mA, T
A
=25°C
CTRce(sat) Vce=0.4 V
1.5
Normalized to:
Vce=10 V, I
F
=10 mA, T
A
=25°C
CTRce(sat) Vce=0.4 V
1.0
T
A
=25°C
1.0
T
A
=70°C
0.5
NCTR(SAT)
NCTR
0.5
NCTR(SAT)
NCTR
0.0
0
i4n25_02
0.0
.1
100
i4n25_04
1
10
I
F
- LED Current - mA
1
10
I
F
- LED Current - mA
100
Figure 2. Normalized Non-Saturated and Saturated CTR vs. LED
Current
Figure 4. Normalized Non-saturated and saturated CTR vs. LED
Current
www.vishay.com
4
Document Number 83725
Rev. 1.4, 26-Jan-05
VISHAY [ VISHAY TELEFUNKEN ]
