SN54F109,SN74F109
DUAL J-K\ POSITIVE-EDGE-TRIGGERED FLIP-FLOPS
WITH CLEAR AND PRESET
SDF9047A - MARCH 1987 - REVISED OCTOBER 1993

• Package Options Include Plastic Small-Outline Packages, Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mill DIPs
  

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 and are inactive (high) data at the J and K\ input meeting the setup-time requirements are transferred to the outputs on the positive-going edge of the clock pulse. Clock triggering ovvurs at a voltage level and is not directly related to the rise in time interval, data at 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 trying J high. They also can perform as D-type flip-flops if J and K\ are tied together.

The SN54F109 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74F109 is characterized for operation from 0° C to 70° C.