What this 1:10 fanout buffer does on your board
The Renesas 74FCT3807AQG is a single-circuit fanout buffer that takes one LVTTL clock or signal input and distributes it to ten CMOS/TTL outputs, each capable of running up to 100 MHz. It operates from a 3V to 3.6V supply. The part is housed in a 20-QSOP — a narrow-body surface-mount package. It is rated for commercial temperature range (0°C to 70°C).
Why the 1:10 ratio and 100 MHz matter for your BOM
The 1:10 fanout means a single clock source can drive up to ten loads. The 100 MHz ceiling is the maximum toggle rate.
Lifecycle and sourcing posture
It is ROHS3 compliant, which covers the latest EU restriction requirements. For BOM planning, this part is a safe choice for new designs and ongoing production — no near-term end-of-life risk.
Package rework and board-fit notes
The 20-QSOP (0.154-inch body width, 3.90 mm) is a fine-pitch SSOP variant. The narrow body means it takes less board space than a wide SOIC, but the pad spacing is tight enough that a good flux and controlled reflow profile matter. If you are hand-reworking, preheat the board to 100°C to avoid lifting the small pads. The part is surface-mount only; no through-hole option exists.