90 MHz synchronous binary counter for high-speed digital logic
The Texas Instruments CD74AC163M is a 4-bit synchronous binary counter from the 74AC family, clocked at a 90 MHz count rate on the positive edge of the clock input. The synchronous reset (active-low) and synchronous timing mean the outputs change only on the clock edge — no ripple-through glitches on the count lines, which simplifies the downstream decode logic in a state machine or frequency divider chain.
Temperature grade and package for industrial signal chains
Housed in a 16-SOIC (0.154-inch body width, 3.90 mm pitch) surface-mount package, the footprint matches standard SOIC-16 land patterns with 1.27 mm pin spacing — no fine-pitch reflow challenge, and hand-solderable for prototype runs. The single-element, 4-bit architecture counts up only (no down-count mode), so for bidirectional counters a second device or a separate up/down counter is needed — confirm the direction requirement before committing the BOM line.
Sourcing and compliance
Fully ROHS3 compliant (lead-free, no exemptions), the device meets the EU RoHS directive for unrestricted use in new designs shipping into regulated markets.