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. The industrial temperature range (-40°C to 85°C) suits it for factory-floor controllers, telecom line cards, and outdoor equipment where the ambient can swing.
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).
Lifecycle and compliance
The CY74FCT162646CTPAC is listed as Active in production status. The RoHS status is marked as non-compliant.