Four-channel unidirectional isolator for high-speed signal paths
The MAX14130FAEE+ from Analog Devices is a general-purpose digital isolator using capacitive coupling to pass four unidirectional channels across a 1000 Vrms isolation barrier. The 150 Mbps data rate and 7.5 ns typical propagation delay keep SPI, UART, and other clocked interfaces running at full speed, while the 25 kV/µs common-mode transient immunity (minimum) holds the link steady under motor-drive or relay-switching noise. Supply voltage spans 1.71 V to 5.5 V on each side.
What the ratings mean for your BOM
Four channels on the MAX14130FAEE+ are all input on side 1, output on side 2 — a fixed-direction layout that suits sensor-to-controller or FPGA-to-MCU links where data flows one way. If your design needs bidirectional lanes (e.g., a full-duplex SPI with chip-select and interrupt), you will need a second device or a part with configurable direction. The 1.71 V to 5.5 V supply range on both sides is wide enough that the same stock code covers mixed-voltage boards; just watch the rise/fall time (2 ns typical) — that edge rate demands careful PCB layout to keep crosstalk below the logic threshold. The 16-QSOP package (3.90 mm width) fits a tight board but requires a fine-pitch solder profile; verify your assembly house can handle the 0.154-inch body.