Data Sheet

©2005 Fairchild Semiconductor Corporation www.fairchildsemi.com
6N138, 5N139, NCPL2730, HCPL2731 Rev. 1.0.5 7
Single-Channel: 6N138, 6N139 Dual-Channel: HCPL2730, HCPL2731 — Low Input Current High Gain Split Darlington Optocouplers
Typical Performance Curves
Fig. 4 LED Forward Current vs. Forward Voltage
FORWARD VOLTAGE - V
F
(V)
1.0 1.1 1.2 1.3 1.4 1.5 1.6
FORWARD CURRENT - I
F
(mA)
0.001
0.01
0.1
1
10
100
T
A
= 85˚C
T
A
= 70˚C
T
A
= -40˚C
T
A
= 0˚C
T
A
= 25˚C
Fig. 5 LED Forward Voltage vs. Temperature
TEMPERATURE - T
A
(˚C)
-40 -20 0 20 40 60 80 100
FORWARD VOLTAGE - V
F
(V)
1.1
1.2
1.3
1.4
1.5
I
F
= 1.6 mA
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 (HCPL2730 / HCPL2731 Only)
R
L
- LOAD RESISTANCE (kΩ)R
L
- LOAD RESISTANCE (kΩ)
0.1 1 10
TIME, T (µs)
1
10
100
t
f
T
A
= 25˚C
I
F
ADJUSTED FOR V
OL
= 2 V
t
r
I
F
- FORWARD CURRENT - mA
Fig. 9 Current Transfer Ratio vs. Forward Current
(6N138 / 6N139 Only)
0.01 0.1 1 10
CURRENT TRANSFER RATIO - CTR (%)
0
400
800
1200
1600
T
A
= -40˚C
T
A
= 0˚C
T
A
= 25˚C
T
A
= 70˚C
T
A
= 85˚C
V
CC
= 5V
V
O
= 0.4V
0.1 1 10
TIME -
µ
s
1
10
t
f
t
r
T
A
= 25˚C
T
PHL
- PROPAGATION DELAY TO LOGIC LOW - (µs)
Fig. 8 Propagation Delay To Logic Low
vs. Base-Emitter Resistance
(HCPL2730 / HCPL2731 Only)
RBE - BASE-EMITTER RESISTANCE - M Ω
0.01 0.1 1 10
0
1
2
3
4
5
6
I
F
= 1.6 mA, V
CC
= 5 V
R
L
= 2.2 K, T
A
= 25°C
Normalized to R
BE
= None