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S-R Flip-Flops
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S-R flip-flops have S (Set) and R (Reset) inputs. SC flip-flops have S (Set) and C (Clear) inputs. There are two types of S-R flip-flops: Active High and Active Low. Like all flip-flops, both types of S-R devices are pulsed with a clock. Depending on the input values, the two complementary outputs (Q and Q') change according to the flip-flop's logical function at the moment of the clock input's active transition. If the S-R flip-flop is an Active High device: If S = 1 and R = 0, then Q = 1 and the state is Set. If S = 0 and R = 1, then Q = 0 and the state is either Reset or Clear. If S = 0 and R = 0, then there is no change in the output condition. The condition S = 1 and R = 1 is an indeterminate state to avoid since a flip-flop cannot be set and reset simultaneously. If the S-R flip-flop is an Active Low device: If S = 0 and R = 1, then Q = 1 and the state is Set. If S = 1 and R = 0, then Q = 0 and the state is either Reset or Clear. If S = 1 and R = 1, there there is no change in the output condition. The condition S = 0 and R = 0 is an indeterminate state to avoid since a flip-flop cannot be set and reset simultaneously. Products & Services
Flip-flops are digital logic devices that synchronize changes in output state (1 or 0) according to a clocked input.
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Digital counters are integrated circuits used for counting events in computers and other digital systems.
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Learn more about Digital Counters
Digital latches are logic devices that latch onto or retain digital states (1 or 0) in data storage circuits.
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Learn more about Digital Latches
Simple programmable logic device (SPLD) chips are the simplest, smallest and least expensive type of programmable logic device (PLD). They typically comprise 4 to 22 fully connected macro cells.
Learn more about Simple Programmable Logic Devices (SPLD)
Monostable multivibrators, also known as one-shots, are digital devices similar to flip-flops, but with only one stable state where they remain until triggered by an input signal. Once triggered, the output is switched to the opposite state.
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J-K flip-flops are a variant of S-R flip-flops in that they define the S-R type's indeterminate state. J-K flip-flops have J (Set) and K (Clear or Reset) inputs and are pulsed with a clock.
If J = 1...
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D flip-flops have one input called D (data) and two outputs called Q and Q'. D flip-flops are pulsed with a clock. The D input is sampled during the clock pulse. If D = 1 when sampling occurs, the...
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A register is a group of binary storage cells capable of holding binary information. A group of flip-flops constitutes a register, since each flip-flop can work as a binary cell. An
n-bit register,...
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Master-slave flip-flops read the input values on the clock's positive edges, but allow the output to respond on only the clock's negative edges. Master-slave flip-flops are also known as...
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Counters are one of the simplest types of sequential networks. A counter is usually constructed from one or more flip-flops that change state in a prescribed sequence when input pulses are received. A...
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