8-bit D-type with tri-state bus hold
The SN74ALS574BDWR is an 8-bit positive-edge-triggered D-type flip-flop from TI's 74ALS family, with tri-state non-inverted outputs that let multiple devices share a common data bus without contention. It clocks at 35 MHz and delivers a maximum propagation delay of 14 ns into a 50 pF load at 5 V — the timing budget for a 35 MHz bus is about 28 ns per half-cycle, so the 14 ns delay leaves roughly 14 ns of setup-and-hold margin for the downstream latch. Supply range is 4.5 V to 5.5 V, and the part draws 18 mA quiescent current. Output drive is rated 2.6 mA source and 24 mA sink — the 24 mA sink handles standard TTL loads and drives the bus capacitance cleanly at 35 MHz.
Commercial temperature, SOIC-20 footprint
Rated for 0°C to 70°C ambient — the commercial temperature grade suits indoor equipment, telecom racks, and benchtop instruments where the enclosure keeps the board below 70°C. Housed in a 20-SOIC wide-body package (7.50 mm body width), the SN74ALS574BDWR is a surface-mount part that shares the same 1.27 mm pitch footprint as other SOIC-20 logic devices. The supplier device package is 20-SOIC. Available in Tape & Reel (TR) or Cut Tape (CT) — the TR variant is the standard reel for pick-and-place assembly; CT suits prototype or low-volume builds.
Active lifecycle and compliance
It is ROHS3 compliant, so it meets the current EU restriction on hazardous substances without an exemption. For new designs, the 74ALS family is a mature 5 V logic series. If the board runs at 3.3 V or needs lower propagation delay, the 74LVC variant (SN74LVC574APWT) runs at 150 MHz with 6.8 ns delay at 3.3 V — but the package and pinout differ, so a PCB spin is required.
Sourcing this exact order code
The SN74ALS574BDWR is sourced to order against an RFQ through authorized and independent distribution channels.