Datasheet

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Document Number: 83725
134 Rev. 1.8, 07-Jan-10
4N25, 4N26, 4N27, 4N28
Vishay Semiconductors
Optocoupler, Phototransistor Output,
with Base Connection
Note
(1)
Indicates JEDEC registered values.
TYPICAL CHARACTERISTICS
T
amb
= 25 °C, unless otherwise specified
Fig. 1 - Forward Voltage vs. Forward Current
Fig. 2 - Normalized Non-Saturated and Saturated CTR vs.
LED Current
Fig. 3 - Normalized Non-Saturated and Saturated CTR vs.
LED Current
Fig. 4 - Normalized Non-Saturated and Saturated CTR vs.
LED Current
CURRENT TRANSFER RATIO
(1)
PARAMETER TEST CONDITION PART SYMBOL MIN. TYP. MAX. UNIT
DC current transfer ratio V
CE
= 10 V, I
F
= 10 mA
4N25 CTR
DC
20 50 %
4N26 CTR
DC
20 50 %
4N27 CTR
DC
10 30 %
4N28 CTR
DC
10 30 %
SWITCHING CHARACTERISTICS
PARAMETER TEST CONDITION SYMBOL MIN. TYP. MAX. UNIT
Rise and fall times V
CE
= 10 V, I
F
= 10 mA, R
L
= 100 Ω t
r
, t
f
2μs
i4n25_01
1001010.1
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
I
F
- Forward Current (mA)
V
F
-Forward Voltage (V)
T
A
= - 55 °C
T
A
= 25 °C
T
A
= 85 °C
i4n25_02
0.0
0.5
1.0
1.5
0 10 100
I
F
- LED Current (mA)
NCTR
NCTR(SAT)
NCTR - Normalized CTR
CTR
CE(sat)
= 0.4 V
V
CE
= 10 V, I
F
= 10 mA, T
A
= 25 °C
T
A
= 25 °C
Normalized to:
1
i4n25_03
1001010.1
0.0
0.5
1.0
1.5
I
F
- LED Current (mA)
N
CTR
- Normalized CTR
CTR
CE(sat)
V
CE
= 0.4 V
NCTR
NCTR(SAT)
T
A
= 50 °C
Normalized to:
V
CE
= 10 V, I
F
= 10 mA, T
A
= 25 °C
i4n25_04
1001010.1
0.0
0.5
1.0
1.5
I
F
- LED Current (mA)
NCTR - Normalized CTR
NCTR
NCTR(SAT)
T
A
= 70 °C
Normalized to:
CTR
CE(sat)
V
CE
= 0.4 V
V
CE
= 10 V, I
F
= 10 mA, T
A
= 25 °C