Bus switch for high-speed signal isolation
The 74FST3244Q is a Renesas bus switch configured as 4 x 1:1 with two independent circuits, meaning each of the two sections contains four single-pole single-throw switches that connect or isolate signal paths without adding propagation delay.
Package and footprint options
Surface-mount packaging means the part reflows with standard solder profiles; the 0.025-inch pitch demands careful stencil alignment to avoid bridging between adjacent pins.
The device is marked RoHS non-compliant, so it contains lead (Pb) above the exemption threshold. For RoHS-required assemblies, a lead-free variant or an alternative bus switch from the same family would be needed — confirm your BOM's environmental requirements before committing.
Sourcing and supply posture
For high-volume or risk-mitigated builds, an RFQ can include a request for alternative bus switches with matching 20-pin SSOP/QSOP footprints and 5 V supply.