3750Vrms isolation and 1Mbps data rate
The TLP104(V4-TPL,E: Rated for 3750Vrms isolation — this is the basic insulation level for reinforced protection in 240VAC mains circuits. The 1Mbps data rate suits industrial fieldbus interfaces like RS-485 or CAN where the bus runs at 500kbps to 1Mbps; the open collector output pulls down to the supply rail, so the logic threshold is set by the pull-up resistor value, not the opto itself. Propagation delay is 550ns max tpLH and 400ns max tpHL — the asymmetry means the output pulse width narrows by up to 150ns at 1Mbps, which is within the timing budget for most PLC digital inputs but worth checking if the downstream edge triggers on the trailing edge. Common-mode transient immunity is 15kV/µs minimum — this is the key spec for motor-drive or inverter environments where high dv/dt on the bus couples into the signal path. A CMTI below 10kV/µs would risk false output toggling; 15kV/µs gives margin for 1200V IGBT switching at 20kHz.
Package and temperature grade
Housed in a 6-SOIC with 5 leads — the missing pin is the sixth position, which is not connected. The 4.55mm body width is the standard SOIC-6 narrow footprint. Operating temperature from -40°C to 125°C covers the industrial range; the 125°C ceiling allows placement near a hot power supply or motor controller without derating. Forward voltage is 1.61V typical at 25mA max forward current. The output side runs from 4.5V to 30V supply, so it interfaces directly with 5V or 24V logic without a level translator.