
Fairchild Semiconductor
Dual Negative-Edge-Triggered Master-Slave J-K Flip-Flop with Preset, Clear, and Complementary Outputs

Motorola => Freescale
Dual JK negative edge-triggered flip-flop

Fairchild Semiconductor
Dual Negative-Edge-Triggered Master-Slave J-K Flip-Flop with Preset, Clear, and Complementary Outputs