What this 16-bit bus transceiver does
The Cypress CY74FCT162646CTPAC is a 16-bit non-inverting transceiver with 3-state outputs, designed for bidirectional data flow on a 5V bus. It integrates two 8-bit elements, each with its own direction and output-enable controls, so a single device handles a full 16-bit data path without external muxing. The 4.5V to 5.5V supply range keeps it compatible with legacy 5V logic families and mixed-voltage backplanes. Output drive is rated at 32 mA sourcing and 64 mA sinking, enough to drive a heavily loaded parallel bus or a bank of LED indicators without external buffers.
Package and mounting — 56-TSSOP footprint
Housed in a 56-lead TFSOP (0.240", 6.10 mm width) package, the CY74FCT162646CTPAC is a surface-mount device. The supplier device package is 56-TSSOP.
Supply voltage and 5V tolerance
The supply voltage range is 4.5V to 5.5V, which means the part is fully 5V-tolerant on the supply rail. Inputs are 5V-logic compatible across the range. This is a straight 5V device — no 3.3V operation, no dual-rail trick. If your design runs a 3.3V core and a 5V peripheral bus, this transceiver sits on the 5V side and level-shifting happens at the boundary. The 5.5V absolute maximum on the supply means a regulated 5V rail with ±10% tolerance stays inside the window; a 5V rail that drifts to 5.6V is already out of spec.
Output drive — 32 mA / 64 mA
Output drive is 32 mA sourcing (IOH) and 64 mA sinking (IOL).
The RoHS status is marked as non-compliant.