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SN74AS757DWR Datasheet(PDF) 1 Page - Texas Instruments |
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SN74AS757DWR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 17 page SN54AS756, SN74AS756, SN74AS757 OCTAL BUFFERS AND LINE DRIVERS WITH OPEN-COLLECTOR OUTPUTS SDAS040B – DECEMBER 1983 – REVISED JANUARY 1995 Copyright © 1995, Texas Instruments Incorporated 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 • Open-Collector Outputs Drive Bus Lines or Buffer Memory Address Registers • Eliminate the Need for 3-State Overlap Protection • pnp Inputs Reduce dc Loading • Open-Collector Versions of ′AS240A and ′AS241 • Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs description These octal buffers and line drivers are designed specifically to improve the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters by eliminating the need for 3-state overlap protection. The designer has a choice of selected combinations of inverting and noninverting outputs, symmetrical active-low output-enable (OE) inputs, and complementary OE and OE inputs. These devices feature high fan-out and improved fan-in. The SN54AS756 is characterized for operation over the full military temperature range of – 55 °C to 125 °C. The SN74AS756 and SN74AS757 are characterized for operation from 0 °C to 70°C. logic symbols‡ 2 1A1 4 1A2 6 1A3 8 1A4 EN 1 1Y1 18 1Y2 16 1Y3 14 1Y4 12 11 2A1 13 2A2 15 2A3 17 2A4 EN 19 2Y1 9 2Y2 7 2Y3 5 2Y4 3 1OE 2OE ′AS756 2 1A1 4 1A2 6 1A3 8 1A4 EN 1 1Y1 18 1Y2 16 1Y3 14 1Y4 12 11 2A1 13 2A2 15 2A3 17 2A4 EN 19 2OE 2Y1 9 2Y2 7 2Y3 5 2Y4 3 1OE SN74AS757 ‡ These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 1OE 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 GND VCC 2OE / 2OE† 1Y1 2A4 1Y2 2A3 1Y3 2A2 1Y4 2A1 SN54AS756 ...J PACKAGE SN74AS756, SN74AS757 . . . DW OR N PACKAGE (TOP VIEW) 3 2 1 20 19 910 11 12 13 4 5 6 7 8 18 17 16 15 14 1Y1 2A4 1Y2 2A3 1Y3 1A2 2Y3 1A3 2Y2 1A4 SN54AS756 . . . FK PACKAGE (TOP VIEW) † 2OE for ′AS756 or 2OE for SN74AS757 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. |
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