UT54ACTS273

Standard Products UT54ACS273/UT54ACTS273 Octal D-Flip-Flops with Clear Datasheet December 16, 2011 www.aeroflex.com/logic FEATURES  Contains eight flip-flops with single-rail outputs  Buffered clock and direct clear inputs  Individual data input to each flip-flop  Applications include: - Buffer/storage registers, shift registers, and pattern generators  CMOS - Latchup immune  High speed Low power consumption Single 5 volt supply Available QML Q or V processes Flexible package - 20-pin DIP - 20-lead flatpack UT54ACS273 - SMD 5962-96578 UT54ACTS273 - SMD 5962-96579 DESCRIPTION The UT54ACS273 and the UT54ACTS273 are positive-edgetriggered D-type flip-flops with a direct clear input. Information at the D inputs meeting the setup time requirements is transferred to the Q outputs on the positive-going edge of the clock pulse. When the clock input is at either the high or low level, the D input signal has no effect at the output. The devices are characterized over full military temperature range of -55C to +125C. FUNCTION TABLE INPUTS OUTPUTS CLR CLK Dx Qx LXX L H H H H L L H L X No change PINOUTS 20-Pin DIP Top View CLR 1Q 1D 2D 2Q 3Q 3D 4D 4Q VSS 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 VDD 8Q 8D 7D 7Q 6Q 6D 5D 5Q CLK 20-Lead Flatpack Top View CLR 1Q 1D 2D 2Q 3Q 3D 4D 4Q VSS LOGIC SYMBOL 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 VDD 8Q 8D 7D 7Q 6Q 6D 5D 5Q CLK CLR CLK (1) (11) 1D (3) 2D (4) 3D (7) ...