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54LS164FMQB Scheda tecnica(PDF) 1 Page - National Semiconductor (TI) |
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54LS164FMQB Scheda tecnica(HTML) 1 Page - National Semiconductor (TI) |
1 / 6 page TLF6398 June 1989 54LS164DM54LS164DM74LS164 8-Bit Serial InParallel Out Shift Registers General Description These 8-bit shift registers feature gated serial inputs and an asynchronous clear A low logic level at either input inhibits entry of the new data and resets the first flip-flop to the low level at the next clock pulse thus providing complete con- trol over incoming data A high logic level on either input enables the other input which will then determine the state of the first flip-flop Data at the serial inputs may be changed while the clock is high or low but only information meeting the setup and hold time requirements will be entered Clock- ing occurs on the low-to-high level transition of the clock input All inputs are diode-clamped to minimize transmis- sion-line effects Features Y Gated (enabledisable) serial inputs Y Fully buffered clock and serial inputs Y Asynchronous clear Y Typical clock frequency 36 MHz Y Typical power dissipation 80 mW Y Alternate MilitaryAerospace device (54LS164) is avail- able Contact a National Semiconductor Sales Office Distributor for specifications Connection Diagram Dual-In-Line Package TLF6398 – 1 Order Number 54LS164DMQB 54LS164FMQB 54LS164LMQB DM54LS164J DM54LS164W DM74LS164M or DM74LS164N See NS Package Number E20A J14A M14A N14A or W14B Function Table Inputs Outputs Clear Clock A B QA QB QH L X X X L L L HL X X QA0 QB0 QH0 H u H HHQAn QGn H u LX L QAn QGn H u XL L QAn QGn H e High Level (steady state) L e Low Level (steady state) X e Don’t Care (any input including transitions) u e Transition from low to high level QA0 QB0 QH0 e The level of QA QB orQH respectively before the indicated steady-state input conditions were established QAn QGn e The level of QA or QG before the most recent u transition of the clock indicates a one-bit shift Logic Diagram TLF6398 – 2 C1995 National Semiconductor Corporation RRD-B30M105Printed in U S A |
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