CD4018BF

The CD4018B-MIL from Texas Instruments is a CMOS presettable N-divide counter. It features 5 Johnson-Counter stages with buffered Q outputs and counter preset control gating. The device includes CLOCK, RESET, DATA, PRESET ENABLE, and 5 individual JAM inputs.

Key electrical characteristics include medium speed operation up to 10 MHz typical at VDD – VSS = 10 V, fully static operation, and 100% tested quiescent current at 20 V. It provides standardized, symmetrical output characteristics and 5-V, 10-V, and 15-V parametric ratings. The maximum input current is 1 µA at 18 V over the full package-temperature range, and 100 nA at 18 V and 25°C. Noise margins are 1 V at VDD = 5 V, 2 V at VDD = 10 V, and 2.5 V at VDD = 15 V.

Applications include fixed and programmable divide-by-10, 9, 8, 7, 6, 5, 4, 3, 2 counters, counters greater than 10, programmable decade counters, and divide-by-"N" counters/frequency synthesizers. The counter advances one count at the positive clock-signal transition, and Schmitt Trigger action on the clock line permits unlimited clock rise and fall times. A high RESET signal clears the counter, and a high PRESET-ENABLE signal allows information on the JAM inputs to preset the counter. Anti-lock gating ensures the proper counting sequence.

The CD4018B types are supplied in various packages, including 16-lead hermetic dual-in-line ceramic packages. This specific variant is in a 16-lead CDIP (J) package and is supplied in TUBE packaging with a standard quantity of 25 units.