Fig. 10 Current Transfer Ratio vs. Base-Emitter Resistance
(6N138 / 6N139 Only)
Fig. 11 Current Transfer Ratio vs. Forward Current
(HCPL-2730 / HCPL-2731 Only)
1600
1400
1200
1000
800
5000
V
V
= 5 V
CC
= 0.4 V
O
4000
3000
2000
1000
0
T
= 70˚C
= 85˚C
= 25˚C
A
T
A
T
A
T
= 0˚C
A
T
= -40˚C
600
A
400
I
V
V
= 1.6 mA
F
200
0
= 5 V
CC
= 0.4 V
O
1
10
100
1000
0.1
1
10
100
R
BE
- BASE RESISTANCE (kΩ)
I - FORWARD CURRENT - mA
F
Fig. 12 Output Current vs Output Voltage
(6N138 / 6N139 Only)
Fig. 13 Output Current vs Output Voltage
(HCPL-2730 / HCPL-2731 Only)
120
100
80
60
50
40
30
20
10
0
I
= 5.0 mA
F
5 mA
V
= 5V
4.5 mA
4 mA
CC
= 25˚C
T
V
= 25˚C
A
T
A
I
= 4.5 mA
= 5.0 V
F
CC
3.5 mA
I
= 4.0 mA
= 3.5 mA
F
3 mA
I
F
2.5 mA
I
I
= 3.0 mA
= 2.5 mA
F
F
2 mA
I
I
I
= 2.0 mA
= 1.5 mA
= 1.0 mA
F
F
F
60
1.5 mA
40
1 mA
20
I
= 0.5 mA
F
0
1
2
0.0
0.2
0.4
0.6
V - OUTPUT VOLTAGE (V)
O
0.8
1.0
1.2
1.4
1.6
1.8
2.0
V
O
- OUTPUT VOLTAGE (V)
Fig. 14 Output Current vs. Input Diode Forward Current
(6N138 / 6N139 Only)
Fig. 15 Output Current vs
Input Diode Forward Current
(HCPL-2730 / HCPL-2731 Only)
100
100
10
1
V
V
= 5.0 V
= 0.4 V
CC
O
T
= 85˚C
A
V
V
= 5 V
CC
= 0.4 V
O
10
T
= 25˚C
A
1
T
= 85˚C
A
T
= -40˚C
A
T
= 70˚C
A
0
T
= 25˚C
A
T
= 0˚C
A
T
= -40˚C
A
0.1
0
0.01
0.1
1
10
0.1
1
10
I - INPUT DIODE FORWARD CURRENT - mA
F
100
I
- INPUT DIODE FORWARD CURRENT - mA
F
8
www.fairchildsemi.com
Single-Channel: 6N138, 6N139 Dual-Channel: HCPL-2730, HCPL-2731 Rev. 1.0.0
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
