CD4018 N Counterof 5 Johnson-Counter stages, buffered Q outputs from each stage, and counter preset control gating. CLOCK, RESET, DATA, PRESET ENABLE, and 5 individual JAM inputs are provided. Divide by 10, 8, 6, 4, or 2 counter configurations can be implemented by feeding the Q\5, Q\4, Q\3, Q\2, Q\1 signals, respectively, back to the DATA input. Divide-by-9, 7, 5, or 3 counter configurations can be implemented by the use of a CD4011B to gate the feedback connection to the DATA input. Divide-by functions grater than 10 can be achieved by use of multiple CD4018B 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 clear the counter to an all-zero condition. A high PRESET-ENABLE signal allows information on the JAM inputs to preset the counter. Anti-lock gating is provided to assure the proper counting sequence.
Features of CD4018 N Counter
■ MEDIUM SPEED OPERATION 10 MHz (Typ.)
at VDD – VSS= 10V
■ FULLY STATIC OPERATION
■ STANDARDIZED SYMMETRICAL OUTPUT
CHARACTERISTICS
■ QUIESCENT CURRENT SPECIFIED UP TO
20V
■ 5V, 10V AND 15V PARAMETRIC RATINGS
■ INPUT LEAKAGE CURRENT
II
= 100nA (MAX) AT VDD = 18V TA = 25°C
■ 100% TESTED FOR QUIESCENT CURRENT
■ MEETS ALL REQUIREMENTS OF JEDEC
JESD13B ” STANDARD SPECIFICATIONS
FOR DESCRIPTION OF B SERIES CMOS
DEVICES”
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