These high gain series couplers use a Light Emitting Diode and an integrated high gain photodetector to provide extremely high current transfer ratio between input and output. Separate pins for the photodiode and output stage result in TTL compatible saturation voltages and high speed operation. Where desired the conventional photodarlington operation. A base access terminal allows a gain bandwidth adjustment to be made.
The 6N139, HCPL-0701, and CNW139 are for use in CMOS, LSTTL or other low power applications. A 400% minimum current transfer ratio is guaranteed over 0 to 70° C operating range for only 0.5 mA of LED current.