Package Options Include Plastic “Small
Outline’ Packages, Ceramic Chip Carriers
and Flat Packages, and Plastic and Ceramic
DIPs

Dependable Texas Instruments Quality and
Reliability

description

These devices contain two independent J-K positive-
edge triggered flip-flops. A low level at the preset or
‘clear inputs sets or resets the outputs regardless of the
levels of the other inputs. When preset and clear are in-
active (high), data at the J and K inputs meeting the
setup time requirements are transferred to the outputs
on the positive-going edge of the clock pulse. Clock
triggering occurs at a voltage level and is not directly
related to the rise time of the clock pulse. Following the
hold time interval, data ar the J and K inputs may be
changed without affecting the levels at the outputs.
These versatile flip-flops can perform as toggle flip-flops
by grounding K and tying J high. They also can perform
23 D-type flip-flops if J and K are tied together.

The SN54109 and SNSALS109A are characterized for
operation over the full military temperature range of
—55°C 10 125°C. The SN74109 and SN74LS109A are
characterized for operation from 0°C to 70°C,