Help identifying an unknown Flip Flop symbol

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John Czerwinski

Joined Jun 19, 2017
18
Hope someone can help

I found this flip flop symbol (see attached) in the SN74LS68 DUAL 4-BIT DECADE OR BINARY COUNTERS datasheet, but don't know what kind of flip-flop it is. There only a clock, reset, and Q listed. There's a plus sign, but don't know what that means.

Any help identifying would be greatly appreciated. Also, if there's a reference out there that would help identifying these, please let me know.

Thanks,
John C
 

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MrChips

Joined Oct 2, 2009
19,382
Since 74LS68 and 74LS69 are ripple counters, these flip-flops are toggle flip-flops. The R input is RESET.

Glad to know that QA has individual clicks.

SN74LS68.jpg
 
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