negativeedgetriggered

Negative edge triggered is a term used in digital electronics to describe a device or circuit that responds to the falling edge of a clock signal. In such a design, the state is captured or an action occurs when the clock transitions from high to low, rather than at the rising edge. Between edges, the inputs do not affect the output, which helps to stabilize data and reduce timing-related hazards.

Most negative edge triggered devices are implemented as edge-triggered flip-flops or latches. A common implementation uses a master-slave arrangement with two latches controlled by complementary clock signals: the master responds while the clock is high, and the slave updates on the falling edge when the clock goes low. This arrangement yields an effective capture of input data on the falling transition, making the device insensitive to input changes during the rest of the clock cycle.

Compared with positive edge triggered devices, negative edge triggered elements capture on the opposite clock edge. This distinction affects timing constraints such as setup and hold times, propagation delays, and clock skew management. In circuit design, choosing edge triggering type depends on clocking scheme, desired data propagation, and compatibility with other synchronous elements.

Common examples include negative edge triggered D flip-flops, JK flip-flops configured for negative-edge triggering, and negative-edge triggered T flip-flops. They are widely used to build synchronous registers, counters, and state machines, where reliable data sampling at a well-defined clock edge is essential.