Bi-directional FIFO, 512 words deep by 32 bits wide
The SN74ACT3638-20PCB is a bi-directional FIFO organized 512 words deep by 32 bits wide — it buffers data flowing in both directions between two clock domains or bus widths without address logic. The 20 ns access time means the part keeps up with a 50 MHz read/write cycle on either port, which is typical for mid-speed DSP or FPGA interfaces in industrial control or telecom line cards.
Active lifecycle, RoHS non-compliant — plan accordingly
The part is RoHS non-compliant, so it is exempt from the EU RoHS directive. This is common for legacy FIFO parts that use leaded solder in the package. If your BOM requires full RoHS compliance, this part does not meet that requirement.
Bulk packaging — tray or tube, not tape-and-reel
The SN74ACT3638-20PCB ships in Bulk format, which typically means anti-static tubes or trays. No tape-and-reel option is listed, so automated pick-and-place lines may need a tube feeder or tray shaker — confirm your assembly house can handle bulk delivery before committing.