SN54F109, SN74F109 DUAL J-K POSITIVE-EDGE-TRIGGERE.
Texas Instruments
SN74F109 - DUAL J-K POSITIVE-EDGE-TRIGGERED FLIP-FLOP
SN54F109, SN74F109 DUAL J-K POSITIVE-EDGE-TRIGGERED FLIP-FLOPS WITH CLEAR AND PRESET SDFS047A – MARCH 1987 – REVISED OCTOBER 1993 • Package Options I.