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synchronous presettable 4-bit binary counter, synchronous clear 25 Ω series resistor 16 QS74FCT2163T: 74x2164 1 16k x 5 cache address comparator three-state (32) SN74ACT2164: 74x2166 1 16k x 5 cache address comparator with input latches three-state (32) SN74BCT2166: 74x2191 1 synchronous presettable 4-bit binary up/down counter, common clock
A 4-bit synchronous counter using JK flip-flops. In a synchronous counter, the clock inputs of the flip-flops are connected, and the common clock simultaneously triggers all flip-flops. Consequently, all of the flip-flops change state at the same time (in parallel). For example, the circuit shown to the right is an ascending (up-counting) four ...
At each advance, the bit on the far left (i.e. "data in") is shifted into the first flip-flop's output. The bit on the far right (i.e. "data out") is shifted out and lost. The data is stored after each flip-flop on the "Q" output, so there are four storage "slots" available in this arrangement, hence it is a 4-bit register.
The following is a list of CMOS 4000-series digital logic integrated circuits.In 1968, the original 4000-series was introduced by RCA.Although more recent parts are considerably faster, the 4000 devices operate over a wide power supply range (3V to 18V recommended range for "B" series) and are well suited to unregulated battery powered applications and interfacing with sensitive analogue ...
An animation of a frequency divider implemented with D flip-flops, counting from 0 to 7 in binary. For power-of-2 integer division, a simple binary counter can be used, clocked by the input signal. The least-significant output bit alternates at 1/2 the rate of the input clock, the next bit at 1/4 the rate, the third bit at 1/8 the rate, etc.
A 4-bit ring counter using D-type flip flops is an example of synchronous logic. Each device is connected to the clock signal, and update together. Main article: synchronous logic
40193 – Up/down binary counter with 4-bit binary preset. Decoders. 4028 – 4-bit BCD to 10-output decoder (can be used as 3-bit binary to 8-output decoder) 4511 – 4-bit BCD to 7-segment display decoder with 25 mA output drivers. Timers. 4047 – Monostable/astable multivibrator with external RC oscillator. 4060 – 14-bit ripple counter ...
The very fastest shifters are implemented as full crossbars, in a manner similar to the 4-bit shifter depicted above, only larger. These incur the least delay, with the output always a single gate delay behind the input to be shifted (after allowing the small time needed for the shift count decoder to settle; this penalty, however, is only incurred when the shift count changes).