The device contains
two independent D-type positive-edge-triggered flip-flops.
All inputs include Schmitt triggers, allowing for slow or
noisy input signals. A low level at the preset (
PRE) input sets the output
high. A low level at the clear ( CLR)
input resets the output low. Preset and clear functions are
asynchronous and not dependent on the levels of the other
inputs. When PRE and
CLR are inactive (high), data
at the data (D) input meeting the setup time requirements is
transferred to the outputs (Q, Q) on
the positive-going edge of the clock (CLK) pulse. Clock
triggering occurs at a voltage level and is not directly
related to the rise time of the input clock (CLK) signal.
Following the hold-time interval, data at the data (D) input
can be changed without affecting the levels at the outputs
(Q, Q).
The device contains
two independent D-type positive-edge-triggered flip-flops.
All inputs include Schmitt triggers, allowing for slow or
noisy input signals. A low level at the preset (
PRE) input sets the output
high. A low level at the clear ( CLR)
input resets the output low. Preset and clear functions are
asynchronous and not dependent on the levels of the other
inputs. When PRE and
CLR are inactive (high), data
at the data (D) input meeting the setup time requirements is
transferred to the outputs (Q, Q) on
the positive-going edge of the clock (CLK) pulse. Clock
triggering occurs at a voltage level and is not directly
related to the rise time of the input clock (CLK) signal.
Following the hold-time interval, data at the data (D) input
can be changed without affecting the levels at the outputs
(Q, Q).