74hc74 flip flop question

Thread Starter

sleigher

Joined Jan 23, 2012
2
Hi

I have a question about a 14 pin 74hc74. It's a Dual D-Type flip flop. I have it currently being used in a circuit to divide the time by 4. 18.432 Mhz to 4.608 for serial communications.

I want to run the circuit timing faster. Say 36.864 Mhz. That's all fine and good until I need to divide by 8. I can get a quad flip flop (74hc175?) to perform this function but it is a 16 pin chip instead of a 14 pin. The board it's on has holes for 14 pins.

My question is does anyone have any clever ideas or ways to adapt a 16 pin flip flop to a 14 pin socket and still maintain the /8 function?

Thanks in advance...
 

ErnieM

Joined Apr 24, 2011
8,055
Perhaps something like the MC14024 would help. It's a 7 stage "ripple counter" made up of 7 flip flops in series, for lots of dividers. I doubt any of the pins line up with your board beyond power and ground but it fits inside the 14 pin limit.
 

Thread Starter

sleigher

Joined Jan 23, 2012
2
That's an ok idea, but would require me to make an adapter. Right now I stack 2 74hc74's and solder a few chips to get the function of a quad. I guess I could make an adapter, daughter board, for a quad. Just seems like a lot of work and it's kinda flaky...
 
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