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SN74AS878DW 数据表(PDF) 1 Page - Texas Instruments |
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SN74AS878DW 数据表(HTML) 1 Page - Texas Instruments |
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1 / 8 page  SN54ALS878A, SN54ALS879A, SN54AS878, SN54AS879 SN74ALS878A, SN74ALS879A, SN74AS878, SN74AS879 DUAL 4BIT DTYPE EDGETRIGGERED FLIPFLOPS WITH 3STATE OUTPUTS SDAS062A − D2661, APRIL 1982 − REVISED MAY 1986 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77001 Copyright 1986, Texas Instruments Incorporated 1 • 3-State Bus Driving Outputs • Full Parallel-Access for Loading • Buffered Control Inputs • Choice of True or Inverting Logic ’ALS878A, ’AS878 True Outputs ’ALS879A, ’AS879 Inverting Outputs • Synchronous Clear • Package Options Include Plastic Small Outline Packages, Both Plastic and Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs • Dependable Texas Instruments Quality and Reliability description These dual 4-bit registers feature 3-state outputs designed specifically for bus driving. This makes these devices particularly suitable for implement- ing buffer registers, I/O ports, bidirectional bus drivers, and working registers. The dual 4-bit edge-triggered flip-flops enter data on the low-to-high transition of the clock (1CLK and 2CLK). All types have individual synchronous clear inputs and output control pins for each group of 4-bit registers. The SN54ALS’ and SN54AS’ devices are characterized for operation over the full military temperature range of − 55 °C to 125°C. The SN74ALS’ and SN74AS’ devices are character- ized for operation from 0 °C to 70°C. 18 14 15 17 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 1CLR 1OC 1D1 1D2 1D3 1D4 2D1 2D2 2D3 2D4 2OC GND VCC 1CLK 1Q1 1Q2 1Q3 1Q4 2Q1 2Q2 2Q3 2Q4 2CLK 2CLR SN54ALS878A, SN54AS878 . . . JT PACKAGE SN74ALS878A, SN74AS878 . . . DW OR NT PACKAGE (TOP VIEW) 32 1 13 5 6 7 8 9 10 11 1Q2 1Q3 1Q4 NC 2Q1 Q22 2Q3 1D2 1D3 1D4 NC 2D1 2D2 2D3 4 16 SN54ALS878A, SN54AS878 . . . FK PACKAGE SN74ALS878A, SN74AS878 . . . FN PACKAGE (TOP VIEW) 28 27 26 25 24 23 22 21 20 19 12 18 14 15 17 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 1CLR 1OC 1D1 1D2 1D3 1D4 2D1 2D2 2D3 2D4 2OC GND VCC 1CLK 1Q1 1Q2 1Q3 1Q4 2Q1 2Q2 2Q3 2Q4 2CLK 2CLR SN54ALS879A, SN54AS879 . . . JT PACKAGE SN74ALS879A, SN74AS879 . . . DW OR NT PACKAGE (TOP VIEW) 32 1 13 5 6 7 8 9 10 11 1Q2 1Q3 1Q4 NC 2Q1 2Q2 2Q3 1D2 1D3 1D4 NC 2D1 2D2 2D3 4 16 SN54ALS879A, SN54AS879 . . . FK PACKAGE SN74ALS879A, SN74AS879 . . . FN PACKAGE (TOP VIEW) 28 27 26 25 24 23 22 21 20 19 12 NC − No internal connection 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. |
类似零件编号 - SN74AS878DW |
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类似说明 - SN74AS878DW |
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