The Texas Instruments SN74HCS240RKSR is an octal inverting buffer and line driver with Schmitt-trigger inputs and 3-state outputs. The Schmitt-trigger inputs provide hysteresis that cleans up slow edges or noisy signals, while the 3-state outputs allow the device to be used on shared data buses.
If your BOM runs at 3.3V with a 5V-tolerant bus, this part handles both levels without a level translator — the Schmitt-trigger input thresholds track the supply rail.
Output drive and bus interface
Each output sources or sinks 7.8 mA, which is typical for driving CMOS logic inputs or short PCB traces. The 3-state outputs let you connect the eight channels to a shared data bus; the output enable control (active-low, per the inverting buffer function) puts all outputs into high-impedance state when asserted. For bus-oriented designs, the 3-state feature avoids contention when multiple drivers share the same lines.
Package and layout — 20-VQFN with exposed pad
The supplier device package is 20-VQFN (2.5x4.5).