Dual-channel 10 MBd optocoupler with open-drain outputs
The VO2631 from Vishay is a dual-channel optocoupler rated for 10 MBd data rate with open-drain outputs, packaged in an 8-DIP through-hole package. It provides 5300 Vrms galvanic isolation between input and output sides, making it suitable for isolating digital logic interfaces in industrial motor drives, PLCs, and power-supply feedback loops.
5300 Vrms isolation and 5 kV/µs CMTI — what they mean for noisy environments
The 5300 Vrms isolation rating qualifies this part for reinforced insulation in mains-connected equipment per IEC 60747-5-5. The 5 kV/µs minimum common-mode transient immunity ensures the output does not glitch when fast voltage transients couple across the isolation barrier — critical in variable-frequency drives and switch-mode power supplies where switching nodes swing hundreds of volts in nanoseconds. For a 5 V logic interface, the open-drain output with 50 mA per-channel sink capability can drive a terminated twisted pair or a standard CMOS load directly.
Propagation delay and timing margin at 10 MBd
With a maximum propagation delay of 100 ns for both low-to-high and high-to-low transitions, and typical rise/fall times of 23 ns and 7 ns respectively, the VO2631 supports 10 MBd NRZ signalling. The symmetrical tpHL/tpLH spec simplifies timing closure in bidirectional isolation channels — no need to budget asymmetric skew. The 100 ns max delay leaves comfortable margin for most 5 V logic families at 10 MHz clock rates, though for daisy-chained SPI isolators you may want to sum delays across the link.
Active lifecycle, DIP-8 footprint, and sourcing posture
Because this is a through-hole DIP-8 part, it remains a popular choice for prototyping, low-volume production, and legacy-board repairs where SMT rework is impractical. If you are evaluating a pin-compatible alternative, the HCPL-2631 from Broadcom (formerly Avago) shares the same footprint and 10 MBd open-drain specification, though always cross-check the forward current and isolation ratings against your design.