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SN54ALS190 Datasheet(PDF) 5 Page - Texas Instruments |
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SN54ALS190 Datasheet(HTML) 5 Page - Texas Instruments |
5 / 8 page ![]() SN54ALS191, SN54ALS191 SYNCHRONOUS 4-BIT UP/DOWN DECADE COUNTERS SDAS210 – D2661, DECEMBER 1982 – REVISED MAY 1986 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 typical load, count, and inhibit sequences 7 8 9 0 1 2 2 2 1 0 9 8 RCO MAX/MIN QD QC QB QA 7 Count Down Load Inhibit Count Up Data Inputs CTEN D/U CLOCK D C B A LOAD ’ALS191 Illustrated below is the following sequence: 1. Load (preset) to BCD seven 2. Count up to eight, nine (maximum), zero, one, and two 3. Inhibit 4. Count down to one, zero (minimum), nine, eight, and seven |