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SN74ALS873BDW Datenblatt(PDF) 1 Page - Texas Instruments |
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SN74ALS873BDW Datenblatt(HTML) 1 Page - Texas Instruments |
1 / 9 page SN54ALS873B, SN54AS873A . . . JT PACKAGE SN74ALS873B, SN74AS873A . . . DW OR NT PACKAGE (TOP VIEW) SN54ALS873B, SN54AS873A . . . FK PACKAGE (TOP VIEW) 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 1LE 1Q1 1Q2 1Q3 1Q4 2Q1 2Q2 2Q3 2Q4 2LE 2CLR NC – No internal connection 32 1 28 27 12 13 5 6 7 8 9 10 11 25 24 23 22 21 20 19 1Q2 1Q3 1Q4 NC 2Q1 2Q2 2Q3 1D2 1D3 1D4 NC 2D1 2D2 2D3 426 14 15 16 17 18 SN54ALS873B, SN54AS873A, SN74ALS873B, SN74AS873A DUAL 4-BIT D-TYPE LATCHES WITH 3-STATE OUTPUTS SDAS036D – APRIL 1982 – REVISED AUGUST 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 • Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Plastic (NT) and Ceramic (JT) DIPs description These dual 4-bit D-type latches feature 3-state outputs designed specifically for bus driving. These devices are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. The dual 4-bit latches are transparent D-type latches. While the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs in true form, according to the function table. When LE is low, the outputs are latched. When the clear (CLR) input goes low, the Q outputs go low independently of LE. The outputs are in the high-impedance state when the output-enable (OE) input is at a high logic level. The SN54ALS873B and SN54AS873A are characterized for operation over the full military temperature range of – 55 °C to 125°C. The SN74ALS873B and SN74AS873A are characterized for operation from 0 °C to 70°C. FUNCTION TABLE (each latch) INPUTS OUTPUT OE CLR LE D Q L L X X L L HH H H L HH L L L HL X Q0 H X X X Z 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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