What this 74FCT3244APGG8 does on the board
The 74FCT3244APGG8 is a dual 4-bit buffer with non-inverting outputs and 3-state control — two independent elements, each handling four bits. It sits between a 3.3V controller and a shared data bus, gating the signal path when the output-enable line is pulled high. The 3-state outputs let multiple buffers share the same bus lines without contention. Supply range is 2.7V to 3.6V, so it runs cleanly off a 3.3V rail. Output drive is 8mA sourcing and 24mA sinking — enough for standard CMOS inputs and short PCB traces, but not meant for driving long backplanes or high-capacitance loads without a bus transceiver stage. The industrial temperature grade (-40°C to 85°C) covers outdoor telecom cabinets, factory-floor controllers, and automotive cabin electronics. No 5V tolerance on the inputs — the absolute maximum on any pin tracks the supply rail, so level translation is needed if the upstream logic runs at 5V.
Package and mounting — 20-TSSOP
The 20-TSSOP package has a 4.40 mm body width. The supplier device package is also 20-TSSOP. For small-batch prototypes, Cut Tape is the practical pick; for production runs, the full reel avoids mid-run splice stops.
Lifecycle and sourcing posture
ROHS3 compliant, so it passes current EU material restrictions without an exemption. No known PCN for die shrinks or package changes that would alter the electrical or mechanical fit.