Three-channel unidirectional isolation for automotive signal chains
It provides 5000Vrms galvanic isolation across the barrier, with two channels on side 1 and one channel on side 2. The part operates from a 2.25V to 5.5V supply on both sides, supporting level translation between different voltage domains without an extra regulator.
100 Mbps data rate and timing margins
Rated for 100 Mbps, this isolator handles SPI clock rates up to 50 MHz (double-edge) and general-purpose digital signals comfortably. The 16 ns max propagation delay in each direction and 4.9 ns max pulse-width distortion mean the timing budget for a 50 MHz SPI bus leaves roughly 4 ns of margin after accounting for driver and receiver delays — enough for most automotive sensor interfaces but worth checking against the specific controller's setup/hold requirements.
85 kV/µs CMTI — built for noisy power environments
Common-mode transient immunity of 85 kV/µs minimum means this part reliably passes data across the isolation barrier when adjacent power stages are switching at tens of kV/µs — typical in traction inverters, DC-DC converters, and motor drives. The 1.3 ns typical rise and 1.4 ns fall times keep signal integrity clean even with fast edges, reducing radiated emissions concerns in EMC testing.
Package and footprint: 16-SOIC wide-body
Surface-mount assembly with standard reflow profiles; the wide-body gives 8 mm creepage distance, meeting reinforced isolation requirements per IEC 60747-17 for automotive and industrial safety applications.
Automotive temperature range and qualification
AEC-Q100 qualification means the part has passed the full suite of automotive stress tests including early-life failure, accelerated lifetime, and temperature cycling — a prerequisite for Tier-1 automotive ECU designs.
Lifecycle and sourcing posture
The base product number ISO7731 covers multiple channel-direction and output-default variants sharing the same 16-SOIC footprint, simplifying second-source qualification within the family.