Fig. 4 LED Forward Current vs. Forward Voltage
Fig. 5 LED Forward Voltage vs.Temperature
100
1.5
1.4
1.3
1.2
1.1
I
F
= 1.6 mA
10
1
T
= 85˚C
A
T
= 70˚C
A
0.1
0.01
T
A
= 25˚C
T
= -40˚C
1.4
A
T
= 0˚C
1.2
A
0.001
1.0
1.1
1.3
1.5
1.6
-40
-20
0
20
40
60
80
100
FORWARD VOLTAGE - V (V)
TEMPERATURE - T (˚C)
F
A
Fig. 6 Non-saturated Rise and Fall Times vs.
Load Resistance (6N138 / 6N139 Only)
Fig. 7 Non-saturated Rise and Fall Times vs.
Load Resistance (HCPL-2730 / HCPL-2731 Only)
100
10
1
T
= 25˚C
A
T
A
= 25˚C
t
f
t
f
10
t
r
t
r
1
I
ADJUSTED FOR V = 2 V
OL
F
0.1
1
10
0.1
1
10
R
- LOAD RESISTANCE (kΩ)
R
L
- LOAD RESISTANCE (kΩ)
L
Fig. 8 Propagation Delay To Logic Low
vs. Base-Emitter Resistance
Fig. 9 Current Transfer Ratio vs. Forward Current
(6N138 / 6N139 Only)
(HCPL-2730 / HCPL-2731 Only)
6
V
V
= 5 V
CC
= 0.4 V
I
R
= 1.6 mA, V = 5 V
CC
O
F
1600
1200
800
400
0
= 2.2 K, T = 25°C
L
A
5
4
3
2
1
Normalized to R = None
BE
T
A
= 85˚C
T
= 70˚C
A
T
= 25˚C
A
T
A
= 0˚C
T
A
= -40˚C
0
0.01
0.1
1
10
0.01
0.1
1
10
I
F
- FORWARD CURRENT - mA
RBE - BASE-EMITTER RESISTANCE - M
Ω
7
www.fairchildsemi.com
Single-Channel: 6N138, 6N139 Dual-Channel: HCPL-2730, HCPL-2731 Rev. 1.0.0
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
