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6N138M, 6N139M, HCPL2730M, HCPL2731M
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8-Pin DIP Low Input Current High Gain Split Darlington Optocouplers
August 2016
Single-Channel: 6N138M, 6N139M
Dual-Channel: HCPL2730M, HCPL2731M
8-Pin DIP 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 to 70°C
Dual Channel – HCPL2730M, HCPL2731M
Safety and Regulatory Approvals
– UL1577, 5,000 VAC
RMS
for 1 Minute
– DIN EN/IEC60747-5-5
Description
The single-channel, 6N138M, 6N139M and dual-channel
HCPL2730M, HCPL2731M optocouplers consist of an
AlGaAs LED optically coupled to a high gain split darling-
ton photodetector.
The split darlington configuration separating the input
photodiode and the first stage gain from the output tran-
sistor permits lower output saturation voltage and higher
speed operation than possible with conventional darling-
ton phototransistor optocoupler. In the dual channel
devices, HCPL2730M and HCPL2731M, an integrated
emitter-base resistor provides superior stability over tem-
perature.
The combination of a very low input current of 0.5 mA
and a high current transfer ratio of 2000% makes this
family particularly useful for input interface to MOS,
CMOS, LSTTL and EIA RS232C, while output compati-
bility is ensured to CMOS as well as high fan-out TTL
requirements. An internal noise shield provides excep-
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