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A3984 Datasheet(PDF) 5 Page - Allegro MicroSystems |
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A3984 Datasheet(HTML) 5 Page - Allegro MicroSystems |
5 / 13 page 5 26184.30A Worcester, Massachusetts 01615-0036 (508) 853-5000 115 Northeast Cutoff, Box 15036 www.allegromicro.com Allegro MicroSystems, Inc. A3984 DMOS Microstepping Driver with Translator Figure 1. Logic Interface Timing Diagram STEP t A t D t C MS1, MS2, RESET, or DIR t B Table 1. Microstep Resolution Truth Table MS1 MS2 Microstep Resolution Excitation Mode L L Full Step 2 Phase H L Half Step 1-2 Phase L H Quarter Step W1-2 Phase H H Sixteenth Step 4W1-2 Phase Time Duration Symbol Typ. Unit STEP minimum, HIGH pulse width tA 1 μs STEP minimum, LOW pulse width tB 1 μs Setup time, input change to STEP tC 200 ns Hold time, input change to STEP tD 200 ns |
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