Hi guys, I'm simulating a circuit which uses a few (actually, 10) Positive-Edge-Triggered JK flip flops. The exact flip-flop design that I'm using is the SN7476 from TI. I need a flip-flop like this, since I need Preset and Clear asynchronous inputs. The datasheet is as follows: http://www.ti.com/lit/ds/symlink/sn7476.pdf In fact, as I'm simulating a circuit with MOS only transistors, I found an adaptation for this circuit on the following link: http://tams-www.informatik.uni-hamb...16-flipflops/40-jkff/SN7476-single_print.html which simplifies my circuit a little bit. As I use it for simulation, I'd like to use a simpler version of this flip-flop, to speed up the process (at this moment, my focus is not the design, I just need to make things faster.) Is there an alternative for this circuit which uses a lower number of transistors? I know this is an Master/Slave flip-flop. I tried to inplement an equivalent circuit using this topology: http://2.bp.blogspot.com/-fxhp4O9oDEo/UGH4G6SSF8I/AAAAAAAAAJ0/ueUKXx0-Eew/s1600/jkffcirc.gif as well as this one http://wearcam.org/ece385/lectureflipflops/flipflops/fig6a.gif with the additional preset/clear signals, but it didn't work as expected. Is there any equivalent popular IC to SN7476? I know that SN7476 is "obsolete", so I took a look at NXP's 74LVC109, but the number of gates goes beyond what I need right now. Any ideas? Thank you in advance.