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A3979 Datasheet(PDF) 2 Page - Allegro MicroSystems |
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A3979 Datasheet(HTML) 2 Page - Allegro MicroSystems |
2 / 15 page DMOS Microstepping Driver with Translator A3979 2 Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com The A3979 is supplied in a low-profile (maximum height ≤ 1.20 mm), 28-pin TSSOP with exposed thermal pad. The package is available in a lead (Pb) free version, with 100% matte tin leadframe plating. Selection Guide Part Number Pb-free* Packing A3979SLP-T Yes 50 pieces per tube A3979SLPTR-T Yes 4000 pieces per reel *Pb-based variants are being phased out of the product line. The variants cited in this footnote are in production but have been determined to be LAST TIME BUY. This classification indicates that sale of this device is currently restricted to existing cus- tomer applications. The variants should not be purchased for new design applications because obsolescence in the near future is probable. Samples are no longer available. Status change: October 31, 2006. Deadline for receipt of LAST TIME BUY orders: April 27, 2007.These variants include: A3979SLP and A3979SLPTR. Description (continued) Absolute Maximum Ratings Load Supply Voltage VBB 35 V Output Current IOUT Output current rating may be limited by duty cycle, ambient temperature, and heat sinking. Under any set of conditions, do not exceed the specified current rating or a junction temperature of 150°C. ±2.5 A Logic Supply Voltage VDD 7.0 V Logic Input Voltage Range VIN tW > 30 ns –0.3 to VDD+ 0.3 V tW < 30 ns –1 to VDD+ 1 V Sense Voltage VSENSE 0.5 V Reference Voltage VREF VDD V Package Power Dissipation PD See page 5 Operating Ambient Temperature TA Range S –20 to 85 °C Junction Temperature TJ(max) 150 °C Storage Temperature Tstg –55 to 150 °C |
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