1.5 ns propagation delay — bus-speed anchor
The 74FCT573CTSOG is a 74FCT-series D-Type Transparent Latch with Tri-State outputs, packing eight latches into a 20-SOIC (7.50 mm wide) body. Propagation delay clocks in at 1.5 ns — that is the time from data-in valid to data-out valid when the latch is transparent, and it sets the ceiling for how fast you can pipeline addresses or data through this part on a 5 V bus. Output drive is rated 15 mA sink and 48 mA source — the asymmetric drive is typical of FAST CMOS outputs, strong enough to drive a heavily loaded backplane trace or a bank of LEDs without external buffers.
Industrial temp range and SOIC footprint
The 20-SOIC package (0.295-inch wide, 7.50 mm) is a standard surface-mount footprint; the 1.27 mm pitch is board-friendly and inspectable without X-ray.