UT54ACTS164

Standard Products UT54ACS164/UT54ACTS164 8-Bit Shift Registers Datasheet November 2010 www.aeroflex.com/logic FEATURES ‰ AND-gated (enable/disable) serial inputs ‰ Fully buffered clock and serial inputs ‰ Direct clear ‰ 1.2μ CMOS - Latchup immune ‰ High speed ‰ Low power consumption ‰ Single 5 volt supply ‰ Available QML Q or V processes ‰ Flexible package - 14-pin DIP - 14-lead flatpack ‰ UT54ACS164 - SMD 5962-96556 ‰ UT54ACTS164 - SMD 5962-96557 DESCRIPTION The UT54ACS164 and the UT54ACTS164 are 8-bit shift registers which feature AND-gated serial inputs and an asynchronous clear. The gated serial inputs (A and B) permit complete control over incoming data. A low at either input inhibits entry of new data and resets the first flip-flop to the low level at the next clock pulse. A high-level at both serial inputs sets the first flip-flop to the high level at the next clock pulse. Data at the serial inputs may be changed while the clock is high or low, providing the minimum setup time requirements are met. Clocking occurs on the low-to-high-level transition of the clock input. The devices are characterized over full military temperature range of -55°C to +125°C. FUNCTION TABLE INPUTS OUTPUTS CLR L CLK X A X B QA QB ... QH XLLL H L X X QA0 QB0 QH0 H ↑ H H H QAn QGn H ↑ L X L QAn QGn H ↑ X L L QAn QGn PINOUTS A B QA QB QC QD VSS 14-Pin DIP Top View A 1 14 VDD B 2 13 QH QA 3 12 QG QB 4 11 QF QC 5 10 QE QD 6 VSS 7 9 CLR 8 CLK 14-Lea...