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 VCC and VO terminals may be tied together to achieve conventional photodarlington operation. A base access terminal allows a gain bandwidth adjustment to be made. The 6N139 is 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. A 300% minimum CTR enables operation with 1 TTL Load using a 2.2 kΩ pull-up resistor.
Low input current requirements – 0.5 mA
TTL compatible output – 0.1V VOL typical
Performance guaranteed over temperature 0°C to 70°C
Base access allows gain bandwidth adjustment
High output current – 60mA
UL recognized – 3750 V rms for 1minute and 5000 V rms for 1 minute per UL 1577