What this 74FCT inverting buffer does on the bus
The CY74FCT2240CTQCT is a dual 4-bit inverting buffer with 3-state outputs from the 74FCT logic family, designed for bus-oriented systems where signal inversion and output disable are needed. The 3-state outputs let multiple devices share a common data line without contention — the buffer goes high-impedance when the output-enable is deasserted, which is the standard approach for bidirectional bus isolation.
20-SSOP footprint and surface-mount assembly
The narrow SSOP footprint matches many 20-pin SOIC patterns with a smaller pitch, so verify the land pattern against your existing board before committing the BOM line.
Industrial temperature grade and environment
The 5V supply rail is common in these settings, and the 74FCT family's bipolar-CMOS process gives it the drive strength to handle capacitive bus loads without excessive propagation delay.
Output drive and 3-state control
Each output can source 15 mA and sink 12 mA, which is typical for 5V bus buffers driving a few TTL loads or a short backplane trace. The 3-state outputs are controlled by the element's output-enable pins (not individually per bit), so the two 4-bit banks can be independently disabled. This matters when you need to isolate one bus segment during power sequencing or boundary scan.
It is ROHS3 compliant.