Single-Channel: 6N138, 6N139 Dual-Channel: HCPL-2730, HCPL-2731 Low Input Current High Gain Split Darlington Optocouplers
July 2006
Single-Channel: 6N138, 6N139
Dual-Channel: HCPL-2730, HCPL-2731
Low Input Current High Gain Split
Darlington Optocouplers
Features
■
Low current - 0.5 mA
■
Superior CTR-2000%
■
■
■
■
Superior CMR-10 kV/µs
CTR guaranteed 0-70°C
U.L. recognized (File # E90700)
VDE recognized (File # 120915) Ordering option
V, e.g., 6N138V
tm
Description
The 6N138/9 and HCPL-2730/HCPL-2731 optocouplers consist
of an AlGaAs LED optically coupled to a high gain split darling-
ton photodetector.
The split darlington configuration separating the input photo-
diode and the first stage gain from the output transistor permits
lower output saturation voltage and higher speed operation than
possible with conventional darlington phototransistor optocou-
pler. In the dual channel devices, HCPL-2730/HCPL2731, an
integrated emitter - base resistor provides superior stability over
temperature.
The combination of a very low input current of 0.5 mA and a
high current transfer ratio of 2000% makes this family particu-
larly useful for input interface to MOS, CMOS, LSTTL and EIA
RS232C, while output compatibility is ensured to CMOS as well
as high fan-out TTL requirements. An internal noise shield pro-
vides exceptional common mode rejection of 10 kV/µs.
■
Dual Channel - HCPL-2730
■
HCPL-2731
Applications
■
Digital logic ground isolation
■
Telephone ring detector
■
EIA-RS-232C line receiver
■
High common mode noise line receiver
■
µP bus isolation
■
Current loop receiver
Package
Schematic
N/C 1
8 V
CC
+ 1
V
F1
8 V
CC
8
1
+ 2
V
F
_
3
7 V
B
_ 2
7 V
01
6 V
O
_
V
F2
3
6 V
02
N/C 4
5 GND
+ 4
5 GND
8
1
8
1
6N138 / 6N139
HCPL-2730 / HCPL-2731
1
Single-Channel: 6N138, 6N139 Dual-Channel: HCPL-2730, HCPL-2731 Rev. 1.0.2
©2005 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
