Current Loop Driver.
Low Input Current Line Receiver.
CMOS Logic Interface.

The TOSHIBA 6N138 and 6N139 consists of a GaAℓAs
infrared emitting diode coupled with a split-Darlington output configuration.
A high speed GaAℓAs Ired manufactured with an unique LPE junction, has the virtue of fast rise and fall time at low drive current.

• Isolation voltage: 2500Vrms (min.)
• Current transfer ratio
   : 6N138 − 300% (min.) (IF=1.6mA)
   : 6N139 − 400% (min.) (IF=0.5mA)
• Switching time: 6N138 − tPHL=10μs (max.)
                        − tPLH=35μs (max.)
                  6N139 − tPHL=1μs (max.)
                        − tPLH=7μs (max.)
• UL recognized: UL1577, file no. E67349