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For example, a four-bit counter can have a modulus of up to 16 (2^4). Counters are generally classified as either synchronous or asynchronous. In synchronous counters, all flip-flops share a common clock and change state at the same time. In asynchronous counters, each flip-flop has a unique clock, and the flip-flop states change at different ...
synchronous presettable up/down 4-bit decade counter 16 SN74LS190: 74x191 1 synchronous presettable up/down 4-bit binary counter 16 SN74LS191: 74x192 1 synchronous presettable up/down 4-bit decade counter, clear 16 SN74LS192: 74x193 1 synchronous presettable up/down 4-bit binary counter, clear 16 SN74LS193: 74x194 1
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 ...
A Johnson counter, named for Robert Royce Johnson, is a ring with an inversion; here is a 4-bit Johnson counter: Note the small bubble indicating inversion of the Q signal from the last shift register before feeding back to the first D input, making this a Johnson counter.
Asynchronous circuits and theory surrounding is a part of several steps in integrated circuit design, a field of digital electronics engineering. Asynchronous circuits are contrasted with synchronous circuits, in which changes to the signal values in the circuit are triggered by repetitive pulses called a clock signal. Most digital devices ...
40110 – Up/down decade counter with 7-segment display decoder with 25 mA output drivers. 40192 – Up/down decade counter with 4-bit BCD preset. 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)
A synchronous 4-bit up/down decade counter symbol (74LS192) in accordance with ANSI/IEEE Std. 91-1984 and IEC Publication 60617-12. There are two sets of symbols for elementary logic gates in common use, both defined in ANSI/IEEE Std 91-1984 and its supplement ANSI/IEEE Std 91a-1991.
In computing, a linear-feedback shift register (LFSR) is a shift register whose input bit is a linear function of its previous state. The most commonly used linear function of single bits is exclusive-or (XOR). Thus, an LFSR is most often a shift register whose input bit is driven by the XOR of some bits of the overall shift register value.