20-TVSOP footprint and layout fit
The SN74LVC574ADGVR: The supplier device package is 20-TVSOP, a thinner variation of the 20-TFSOP (0.173", 4.40 mm width) — same 0.5 mm pitch, same land pattern, but the TVSOP profile sits lower on the board. The layout engineer should use the TVSOP-specific footprint from the TI package drawing; the TFSOP footprint is electrically identical but the pick-and-place nozzle and solder-paste stencil aperture differ for the thinner body. Surface-mount only — no through-hole variant in this package code. The 20-pin count with 0.5 mm pitch means the fan-out vias fit on a two-layer board if the trace width is kept under 0.15 mm under the component.
6.8 ns propagation delay and 24 mA output drive
Max propagation delay is 6.8 ns at 3.3 V with a 50 pF load — this sets the ceiling for the clock-to-data-valid timing in a synchronous bus. At 150 MHz clock frequency, the 6.7 ns period leaves roughly one gate delay for setup-and-hold margin before the next rising edge. Output drive is 24 mA source and sink at the rated supply voltage — enough to drive five or six standard 74LVC inputs directly without a buffer. The tri-state output allows multiple devices to share a common data bus; the non-inverted path means the output follows the D input on the rising clock edge.
Industrial temperature range and supply flexibility
Operating temperature spans -40 °C to 125 °C ambient — full industrial and automotive-compatible range. The 1.65 V to 3.6 V supply rail covers 1.8 V, 2.5 V, and 3.3 V logic families without a level translator on the input side, as long as the output load is within the same voltage domain. Quiescent current is 10 µA typical — low enough for battery-backed or always-on domains where the register holds state during sleep. Input capacitance is 4 pF per pin, which keeps the bus loading light when multiple registers are daisy-chained on the same clock line.
Active lifecycle and compliance
Texas Instruments lists this part as Active with a current lifecycle stage — no NRND or EOL flag. ROHS3 compliant, no exemptions. The 74LVC family is a mature logic series with broad second-source availability across multiple manufacturers, so single-source risk is low. Available in Tape & Reel (TR) for automated assembly and Cut Tape (CT) for prototype or low-volume builds. The reel quantity is typically 2000 or 2500 pieces per reel for the TVSOP package — confirm the exact reel count at quote.