HCF4018B

The HCC4018B (extended temperature range) and HCF4018B (intermediate temperature range) are monolithic integrated circuit, available in 16-lead dual in-line plastic or ceramic package and plastic micropackage.

The HCC/HCF4018B types consist of 5 Johnson- Counter stages, buffered Q outputs from each stage, and counter preset control gating. CLOCK, RESET,DATA, PRESETENABLE, and 5 individual JAM inputs are provided. Divide by 10, 8, 6, 4, or 2 counter configurations can be implemented by feeding the Q5, Q4, Q3, Q2, Q1 signals, respectively, back to the DATA input.

Divide-by-9, 7, 5, or 3 counter configurations can be implemented by the use of a HCC/HCF4011B gate package to properly gate the feedback connection to the DATA input. Divide-by-functions greater than 10 can be achieved by use of multiple HCC/HCF4018B units. The counter is advanced one count at the positive clock-signal transition. Schmitt Trigger action on the clock line permits unlimited clock rise and fall times. A high RESET signal clears the counter to an all-zero condition. A high PRESENTENABLE signal allows information on the JAM inputs to preset the counter. Anti-lock gating is provided to assure the proper counting sequence.