16 MHz count rate, 3 V to 18 V supply — the parametric envelope
The CD4033BPW is a 4000B-series decade counter from Texas Instruments, clocked at a maximum count rate of 16 MHz on a positive edge. That 16 MHz ceiling sets the fastest input clock the internal ripple chain can follow before the output update lags the input — for a frequency counter or a time-base divider, the input signal must stay below this rate to maintain clean decade transitions. Supply voltage spans 3 V to 18 V, which means the same part works in a 5 V TTL system, a 12 V industrial logic rail, or a battery-powered 3.3 V design without a separate level translator. The wide range is a hallmark of the 4000B family — the CMOS structure draws near-zero quiescent current at any supply within that band.
Temperature grade and package — where this part fits on the board
Housed in a 16-TSSOP package (4.40 mm width, 0.173" pitch), the part sits on a surface-mount board with a 0.65 mm lead pitch typical of this footprint.
Asynchronous reset and single-element decade counting
The reset is asynchronous — the counter clears to zero immediately when the reset pin is asserted, without waiting for the next clock edge. This is useful for a one-shot clear at power-up or for synchronizing multiple counters from a common reset signal. A single element (one counter per package) with five bits per element gives a BCD output for the decade count. The direction is fixed to up-counting only — the CD4033BPW increments on each positive clock edge and wraps from 9 back to 0.
Active lifecycle and compliance — no obsolescence risk for new builds
ROHS3 compliant, so it meets the European Restriction of Hazardous Substances directive without exemption. No additional compliance paperwork is needed for shipping into ROHS-regulated markets.