Decade counter in the LS family
The Texas Instruments SNJ54LS490W is a decade counter from the LS (Low-Power Schottky) series, a logic family that balances speed and power for TTL-based systems. It counts in decade (0-9) sequence and is used in frequency division, time-base generation, and event counting within industrial control, instrumentation, and military/aerospace digital logic boards. The part is supplied in Bulk packaging, which means it ships as loose units — typical for through-hole or DIP-style ICs that go into prototype runs, repair stock, or low-volume production where tape-and-reel is unnecessary.
Active lifecycle and RoHS status
The SNJ54LS490W carries an Active product status — the manufacturer continues to support it for new designs and production builds. One important compliance note: this device is RoHS non-compliant. The lead-bearing finish is typical for legacy LS-series logic, which was designed before the RoHS directive. If your BOM requires RoHS-10 or lead-free solder processes, this part will not pass — you would need to evaluate a lead-free equivalent or accept the exemption for military/aerospace applications where RoHS exemptions often apply.
Sourcing posture and availability
Because the part is Active, it is sourced through authorized TI distribution channels as well as independent inventory. We quote the part to order against your BOM quantity — availability and current pricing are confirmed at RFQ time, not from a static stock figure.