DF231 is a static, master-slave, multiplexed scan D flip-flop. SET and RESET are asynchronous and active low. Output is unbuffered and changes state on the rising edge of the clock. Logic Symbol DF231 DS C SD SE R Q Truth Table C D RN ↑HH ↑LH ↑XH ↑XH XX L XXH XX L L XH NC = No Change SD SE SN Q.