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SN74ALS874BNT 데이터시트(PDF) 1 Page - Texas Instruments |
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SN74ALS874BNT 데이터시트(HTML) 1 Page - Texas Instruments |
1 / 20 page SN54ALS874B, SN74ALS874B, SN74ALS876A SN74AS874, SN74AS876 DUAL 4-BIT D-TYPE EDGE-TRIGGERED FLIP-FLOPS SDAS061C – APRIL 1982 – REVISED JANUARY 1995 Copyright © 1995, Texas Instruments Incorporated 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 • 3-State Buffer-Type Outputs Drive Bus Lines Directly • Bus-Structured Pinout • Choice of True or Inverting Logic – SN54ALS874B, SN74ALS874B, SN74AS874 Have True Outputs – SN74ALS876A, SN74AS876 Have Inverting Outputs • Asynchronous Clear • Package Options Include Plastic Small-Outline (DW) Packages, Plastic (FN) and Ceramic (FK) Chip Carriers, and Standard Plastic (NT) and Ceramic (JT) 300-mil DIPs description These dual 4-bit D-type edge-triggered flip-flops feature 3-state outputs designed specifically as bus drivers. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. The edge-triggered flip-flops enter data on the low-to-high transition of the clock (CLK) input. The SN54ALS874B, SN74ALS874B, and SN74AS874 have clear (CLR) inputs and noninverting Q outputs. The SN74ALS876A and SN74AS876 have preset (PRE) inputs and inverting Q outputs; taking PRE low causes the four Q or Q outputs to go low independently of the clock. The SN54ALS874B is characterized for operation over the full military temperature range of – 55 °C to 125 °C. The SN74ALS874B, SN74ALS876A, SN74AS874, and SN74AS876 devices are characterized for operation from 0 °C to 70°C. 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 1OE 1D1 1D2 1D3 1D4 2D1 2D2 2D3 2D4 2OE GND VCC 1CLK 1Q1 1Q2 1Q3 1Q4 2Q1 2Q2 2Q3 2Q4 2CLK 2CLR SN54ALS874B ...JT PACKAGE SN74ALS874B, SN74AS874 . . . DW OR NT PACKAGE (TOP VIEW) 32 1 13 14 5 6 7 8 9 10 11 1Q2 1Q3 1Q4 NC 2Q1 2Q2 2Q3 1D2 1D3 1D4 NC 2D1 2D2 2D3 4 15 16 17 18 SN54ALS874B . . . FK PACKAGE (TOP VIEW) 28 27 26 25 24 23 22 21 20 19 12 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 1PRE 1OE 1D1 1D2 1D3 1D4 2D1 2D2 2D3 2D4 2OE GND VCC 1CLK 1Q1 1Q2 1Q3 1Q4 2Q1 2Q2 2Q3 2Q4 2CLK 2PRE SN74ALS876A, SN74AS876 . . . DW OR NT PACKAGE (TOP VIEW) 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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