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CD54HC190 数据表(PDF) 8 Page - Texas Instruments |
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CD54HC190 数据表(HTML) 8 Page - Texas Instruments |
8 / 26 page CD54HC190, CD74HC190 CD54HC191, CD74HC191, CD54HCT191, CD74HCT191 SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL SCHS275E − MARCH 2002 − REVISED OCTOBER 2003 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 typical load, count, and inhibit sequence for ’HC190 The following sequence is illustrated below: 1. Load (preset) to BCD 7 2. Count up to 8, 9 (maximum), 0, 1, and 2 3. Inhibit 4. Count down to 1, 0 (minimum), 9, 8, and 7 Parallel Load Preset Input Data P0 P1 P2 P3 Clock Down/Up Clock Enable Q0 Q1 Q2 Q3 Terminal Count Ripple Clock Load H H 78 90 1 2 2 2 1 0 9 8 7 L L L L H H H H H L L L L H Count Up Inhibit Count Down |
类似零件编号 - CD54HC190 |
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类似说明 - CD54HC190 |
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