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SN74ALS819 Datasheet(PDF) 1 Page - Texas Instruments |
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SN74ALS819 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 13 page SN74ALS819, SN74ALS29818 8BIT DIAGNOSTICS/PIPELINE REGISTERS SDAS105A − JANUARY 1986 − REVISED OCTOBER 1986 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77001 Copyright 1986, Texas Instruments Incorporated 1 • High-Speed 8-Bit Parallel Pipeline Register • Serial Shadow Register With Right-Shift Only • ’ALS29818 Performs Parallel-to-Serial and Serial-to-Parallel Conversion • Designed Specifically for Use in Applications Such As: Write Control Store (’ALS29818) Serial Shadow-Register Diagnostics • ’ALS819 Provides Even-Parity Output • Low Power Dissipation ... 215 mW Typical • ’ALS29818 is Functionally Equivalent to AMD AM29818 • Package Options include Plastic Small Outline Packages, Standard Plastic DIPs, and Plastic Chip Carriers description The SN74ALS819 and SN74ALS29818 are 8-bit pipeline registers each with an on-chip shadow register. They are for use in applications such as write control store and shadow register diagnos- tics. The output registers of the ’ALS819 and ’ALS29818 are loaded in parallel from either the I/O port (DQ0 −DQ7) or the shadow register. The shadow register of the ’ALS2981A 8 can be loaded serially or from either the I/O port (Y0 −Y7) or the pipeline register. The ’ALS819 shadow register can be loaded serially or from the I/O port (DQ0 −DQ7). In addition, the ’ALS819 provides a Parity-Even (PE) output, which monitors parity of the output register. Operation of these devices is controlled by the Mode and SDI inputs as shown in the function table. The SN74ALS819 and SN74ALS29818 are characterized for operation from 0 °C to 70°C. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. 4 43 16 17 14 18 15 3 5 6 7 8 9 10 11 13 12 2 PE SRCLK DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 SDI GND SN74ALS819 ...DW OR JT PACKAGE (TOP VIEW) SN74ALS819 . . . FN PACKAGE (TOP VIEW) SN74ALS29818 . . . DW OR NT PACKAGE (TOP VIEW) SN74ALS29818 . . . FN PACKAGE (TOP VIEW) NC − No internal connection 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VCC MODE Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 SDO ORCLK 1 Y1 Y2 Y3 NC Y4 Y5 Y6 DQ1 DQ2 DQ3 NC DQ4 DQ5 DQ6 28 27 26 25 24 23 22 21 20 19 OEY SRCLK DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 SDI GND 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VCC MODE Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 SDO ORCLK 5 6 7 8 9 10 11 13 12 14 21 Y1 Y2 Y3 NC Y4 Y5 Y6 DQ1 DQ2 DQ3 NC DQ4 DQ5 DQ6 15 16 1718 28 27 26 25 24 23 22 21 20 19 |
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