18-bit bus-interface latch — parametric fit
The 74ALVCH16843DGGY: Two independent 9-bit latches per package (circuit 9:9) give the board designer a single-device solution for 18-bit bus-interface or register applications where the latch is transparent when the enable is asserted. With a 2.2 ns typical propagation delay and 24 mA symmetrical output drive (high and low), this latch keeps up with fast memory and processor buses without adding a timing margin penalty.
Package and board-level integration
Supplied in a 56-TFSOP (0.240", 6.10 mm width) package, also designated as 56-TSSOP by NXP — the 0.50 mm pitch footprint demands careful PCB layout for fan-out and decoupling placement.