100151DC — D flip-flop from the 100K series
The 100151DC is a D flip-flop belonging to the 100K series logic family, designed for high-speed digital systems where propagation delay and signal integrity matter. The 100K family is a well-known ECL (emitter-coupled logic) series, offering faster edge rates than standard TTL, which makes this part suitable for clock distribution, data latching, and pipeline registers in timing-critical paths.
Lifecycle and compliance — what to expect
However, the part is marked RoHS non-compliant, so it contains lead (Pb) in the solder finish or die attach — a critical consideration for any design targeting RoHS exemption or lead-free assembly. If your BOM requires full RoHS compliance, this part will not pass inspection without an exemption claim. The laser etch and date-code trace should match National Semiconductor (original 100K series foundry) markings; any deviation in font or logo alignment warrants a decap check before accepting bulk stock.
Sourcing — quoted to order
Because the part is active but RoHS non-compliant, supply tends to be steady but not abundant — expect to RFQ for firm lead time and lot traceability. For high-reliability or long-lifecycle programs, request date-code consistency and, if the volume warrants, a decap verification to confirm the die matches the original 100K series mask set.