Binary counter, 74HC logic family
The Texas Instruments MM74HC191N is a binary counter from the 74HC series, a high-speed CMOS logic family that balances speed with low power consumption for general-purpose digital counting applications. Listed under Microcontrollers & Processors, this is a logic-level binary counter — not a microcontroller — used in frequency division, event counting, and sequential timing circuits where a 4-bit up/down counter is needed.
Active production, RoHS constraint
RoHS non-compliant. This part contains lead in the solder finish or die attach, which exempts it from RoHS restrictions for certain applications but means it cannot be used in new designs requiring full RoHS compliance without an exemption claim.