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DM74LS259MFAIN/a432avai8-Bit Addressable Latches
DM74LS259NFSCN/a13avai8-Bit Addressable Latches


DM74LS259M ,8-Bit Addressable LatchesDM74LS259 8-Bit Addressable LatchesAugust 1986Revised March 2000DM74LS2598-Bit Addressable Latches
DM74LS259N ,8-Bit Addressable LatchesFeaturesThese 8-bit addressable latches are designed for general 8-Bit parallel-out storage regist ..
DM74LS259WM ,8-Bit Addressable Latches
DM74LS266MX , Quad 2-Input Exclusive NOR Gate with Open Collector OutputsGeneral DescriptionThis device contains four independent gates each of whichperforms the logic excl ..
DM74LS266N ,QUAD 2-INPUT EXCLUSIVE-NOR GATE WITH OPEN-COLLECTOR OUTPUTSGeneral Description This device contains four independent gates each of which performs the logi ..
DM74LS26M ,Quad 2-Input NAND Gate with High Voltage Open-Collector OutputsGeneral Description Pull-Up Resistor EquationsThis device contains four independent gates each of w ..
DS21S07AS ,SCSI TerminatorFEATURES Fully Compliant with SCSI-1, Fast SCSI, and Ultra SCSI Backward Compatible to the DS2107 ..
DS21S07AS/TR , SCSI Terminator
DS21T05 ,SCSI TerminatorFUNCTIONAL DESCRIPTIONThe DS21T05 consists of a bandgap reference, buffer amplifier, and nine termi ..
DS21T05Z+ ,SCSI TerminatorFUNCTIONAL DESCRIPTIONThe DS21T05 consists of a bandgap reference, buffer amplifier, and nine termi ..
DS21T06 , SCSI Terminator
DS21T07 ,SCSI TerminatorFUNCTIONAL DESCRIPTIONThe DS21T07 consists of a bandgap reference, buffer amplifier, and nine termi ..


DM74LS259M-DM74LS259N
8-Bit Addressable Latches
DM74LS259 8-Bit Addressable Latches August 1986 Revised March 2000 DM74LS259 8-Bit Addressable Latches General Description Features These 8-bit addressable latches are designed for general � 8-Bit parallel-out storage register performs serial-to-par- purpose storage applications in digital systems. Specific allel conversion with storage uses include working registers, serial-holding registers, � Asynchronous parallel clear and active-high decoders or demultiplexers. They are mul- � Active high decoder tifunctional devices capable of storing single-line data in � Enable/disable input simplifies expansion eight addressable latches, and being a 1-of-8 decoder or � Direct replacement for Fairchild DM9334 demultiplexer with active-high outputs. Four distinct modes of operation are selectable by control- � Expandable for N-bit applications ling the clear and enable inputs as enumerated in the func- � Four distinct functional modes tion table. In the addressable-latch mode, data at the data- � Typical propagation delay times: in terminal is written into the addressed latch. The Enable-to-output 18 ns addressed latch will follow the data input with all unad- Data-to-output 16 ns dressed latches remaining in their previous states. In the memory mode, all latches remain in their previous states Address-to-output 21 ns and are unaffected by the data or address inputs. To elimi- Clear-to-output 17 ns nate the possibility of entering erroneous data in the � Fan-out latches, the enable should be held HIGH (inactive) while I (sink current) 8 mA the address lines are changing. In the 1-of-8 decoding or OL demultiplexing mode, the addressed output will follow the I (source current) −0.4 mA OH level of the D input with all other outputs LOW. In the clear � Typical I 22 mA CC mode, all outputs are LOW and unaffected by the address and data inputs. Ordering Code: Order Number Package Number Package Description DM74LS259M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow DM74LS259WM M16B 16-Lead Small Outline Intergrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide DM74LS259N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. © 2000 DS006418
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