10-bit D-Type register with tri-state bus hold
The CY74FCT821ATSOC from Cypress (now Infineon) is a 10-bit D-type flip-flop in the 74FCT logic family, clocked on the positive edge and delivering tri-state, non-inverted outputs. It packs ten flip-flops into a single 24-SOIC package with a standard function — no master reset, no preset — just clean edge-triggered storage for address, data, or control registers on a 5V bus. Propagation delay is specified at 20 ns into a 300 pF load, which tells you this part is built for driving capacitive bus lines, not just point-to-point logic. Input capacitance is 5 pF per pin, keeping the load on the driving device manageable.
Tri-state outputs and bus architecture fit
The tri-state, non-inverted outputs let you wire the CY74FCT821ATSOC onto a shared data or address bus without contention — the outputs go high-impedance when the output-enable control is deasserted. This makes it a natural fit for microprocessor systems where multiple peripherals share a bus, or for buffered register banks in industrial controllers.
Lifecycle and sourcing reality
It is ROHS3 compliant, so it passes the material compliance gate for new builds. No last-time-buy risk, no forced redesign for obsolescence.