The LTM2892CY-S#PBF is a 6-channel, unidirectional SPI digital isolator from the µModule family, using magnetic coupling to deliver 3500Vrms of galvanic isolation across a 3V to 5.5V supply range. It is designed for isolated SPI buses in industrial automation, motor drives, medical equipment, and any system where a noisy ground plane or safety isolation barrier must separate the controller from the peripheral. Six channels are split 3/3 between side 1 and side 2, matching the typical SPI signal set (SCK, MOSI, MISO plus three chip-select or control lines) without needing an extra isolator for the fourth wire. The unidirectional channel type means each signal path has a fixed direction — plan the layout so the controller side and peripheral side assignments match the PCB routing. Data rate is rated at both 4MHz and 8MHz. For SPI buses running at 4MHz or below, the part meets the timing with margin; at 8MHz the 100ns max propagation delay (tpLH/tpHL) becomes the limiting factor for clock-to-data setup on long traces. If your SPI clock exceeds 8MHz, this part will not close timing.
No isolated power — plan an external rail
The LTM2892CY-S#PBF does not include an integrated isolated DC-DC converter. Both sides of the isolation barrier need their own supply rails, each within 3V to 5.5V. For a 3.3V system, that means a separate isolated power module or a transformer-coupled flyback to generate the secondary-side rail. Factor that into the BOM cost and board area — the 24-BGA package itself is compact at 9x6.25mm, but the external power supply adds real estate.
Package, temperature grade, and storage
Housed in a 24-BBGA (9x6.25mm) surface-mount package, this is a BGA with a 1.0mm ball pitch typical of Analog Devices µModule isolators. Not rated for -40°C automotive or outdoor telecom enclosures. Rise and fall times are a typical 3ns each, which keeps edge-rate emissions manageable for a BGA layout. Common-mode transient immunity is rated at 50kV/µs minimum, meaning the part rejects fast voltage transients across the isolation barrier — important for motor-drive applications where PWM switching couples noise into the ground plane.
Lifecycle and supply posture
If you are stocking for a multi-year production run, the active lifecycle means you can order in volume without chasing last-time-buy allocations.