Isolated digital link for noisy industrial backplanes
The TLP2348(V4-TPL,E is a single-channel, high-speed logic output optocoupler from Toshiba that delivers 10 Mbps data rate with a push-pull, totem-pole output stage — a combination that suits it for isolating digital control signals in PLC I/O modules, motor-drive interfaces, and inverter gate-drive circuits where ground loops and common-mode transients are the main failure modes. Rated for 3750 Vrms isolation, the part provides a reinforced safety barrier between the low-voltage controller side and the high-voltage power stage, meeting basic insulation requirements for industrial equipment per IEC 60950-1. The 30 kV/µs minimum common-mode transient immunity (CMTI) means the output does not glitch when a 600 V IGBT switches at 20 kHz — a spec that separates this part from general-purpose optocouplers in variable-frequency drive applications.
Operating temperature from -40°C to 110°C covers the industrial ambient range with margin for self-heating in a 6-SOIC package — the 1.55 V forward voltage (typ) and 15 mA max LED current keep the input-side power dissipation low enough that no derating is needed at 85°C ambient.