AEC-Q101 photocoupler for isolated 10MBd links
The TLX9378(TPL,F: It delivers a 10MBd data rate with 100ns max propagation delay, making it suitable for isolated communication in engine control units, battery management systems, and motor drive feedback paths. Rated for 3750Vrms isolation with a minimum common-mode transient immunity of 15kV/µs, this part maintains signal integrity across the galvanic barrier in high-noise automotive environments like traction inverter gate drives.
Output drive and timing budget
The open collector output sinks up to 25 mA per channel from a 4.5V to 5.5V supply — enough to drive a downstream logic input or a small relay coil directly without a buffer. Typical rise/fall times are 90ns and 30ns respectively, so the 100ns propagation delay is the dominant term in the loop timing budget. Input-side forward voltage is 1.75V max at 25 mA forward current — standard 3.3V or 5V logic can drive it through a series resistor. The 1/0 input-side/side-2 count confirms this is a unidirectional isolator.
Housed in a 6-SOIC package with 5 leads (0.179" body width, 4.55mm), the TLX9378(TPL,F uses a surface-mount footprint compatible with standard SOIC-6 land patterns. The supplier device package is listed as 6-SO, 5 Lead — the missing pin is the no-connect on position 6.
Active lifecycle — no LTB pressure
The AEC-Q101 qualification means it has passed automotive-grade reliability testing including high-temperature operating life, temperature cycling, and ESD sensitivity screening per AEC-Q101-006.