Isolation barrier and output drive capability
The Darlington output with base access allows the designer to adjust the switching threshold or add a pull-down resistor for noise immunity — a feature missing from simpler Darlington optocouplers. Minimum current transfer ratio of 500% at 1.6 mA forward current means the LED can be driven directly from a 3.3V or 5V logic output without an external transistor, saving one driver stage per channel.
Switching speed and timing margin
Turn-on time of 240 ns and turn-off time of 1.3 µs (typical) set the practical data rate ceiling around 500 kbps — adequate for slow serial buses like RS-485 or I2C isolation, but not for high-speed SPI or CAN FD. The asymmetric turn-on/turn-off skew means the propagation delay mismatch must be budgeted in the system timing analysis, especially in multi-channel or daisy-chained isolation paths.
Package and assembly fit
8-SMD gull-wing package (8-SMD, Gull Wing) is a surface-mount footprint compatible with standard reflow profiles and allows visual solder-joint inspection — a practical advantage over leadless packages in high-reliability or rework-prone builds. The package is supplied in Tube, which is the standard handling format for through-hole or large-body SMD parts; tape-and-reel availability is not listed, so confirm packaging with your order quantity.