What the FCT bus driver does in a processor system
The CD74FCT573ATE is an octal transparent latch with three-state outputs, part of TI's FCT (Fast CMOS TTL-compatible) logic family. It sits between a processor bus and downstream peripherals, latching data on command and driving the bus without loading the source.
RoHS non-compliance and what it means for a BOM
The CD74FCT573ATE is marked RoHS non-compliant, which restricts its use in new EU-market products under the RoHS directive. Legacy designs or military/aerospace builds with an exemption can still specify it. For a BOM that requires RoHS compliance, the same FCT function is available in a lead-free finish under a different TI order code — the electrical spec is identical, only the plating changes.
Sourcing posture and supply reality
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