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A3981 Datasheet(PDF) 2 Page - Allegro MicroSystems |
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A3981 Datasheet(HTML) 2 Page - Allegro MicroSystems |
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2 / 42 page  Automotive, Programmable Stepper Driver A3981 2 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com Selection Guide Part Number Packing* A3981KLP-T 50 pieces per tube 4.4 mm × 9.7 mm, 1.2 mm nominal height TSSOP with exposed thermal pad A3981KLPTR-T 4000 pieces per reel *Contact Allegro® for additional packing information. Absolute Maximum Ratings With respect to GND Characteristic Symbol Notes Rating Unit Load Supply Voltage VBBx Applies to VBBA and VBBB –0.3 to 50 V Logic Supply Voltage VDD –0.3 to 6 V Pin CP1 –0.3 to VBB V Pins CP2, VCP –0.3 to VBB+8 V Pins STEP, DIR, ENABLE, DIAG –0.3 to 6 V Pin VREG –0.3 to 8.5 V Pin RESETn Can be pulled to VBB with 38 kΩ –0.3 to 6 V Pin OSC –0.3 to 6 V Pins MS0, MS1 –0.3 to 6 V Pins SDI, SDO, SCK, STRn –0.3 to 6 V Pin REF –0.3 to 6 V Pins OAP, OAM, OBP, OBM –0.3 to VBB V Pins SENSA, SENSB –0.3 to 1 V Ambient Operating Temperature Range TA Range K; limited by power dissipation –40 to 150 °C Maximum Continuous Junction Temperature TJ(max) 150 °C Transient Junction Temperature TtJ Overtemperature event not exceeding 10 s, lifetime duration not exceeding 10 hours, guaranteed by design and characterization 175 °C Storage Temperature Range Tstg –55 to 150 °C Thermal Characteristics may require derating at maximum conditions Characteristic Symbol Test Conditions* Value Unit Package Thermal Resistance (Junction to Ambient) RθJA 4-layer PCB based on JEDEC standard 28 ºC/W 2-layer PCB with 24.52 cm2 of copper area each side 32 ºC/W Package Thermal Resistance (Junction to Pad) RθJP 2 ºC/W *Additional thermal information available on the Allegro website |
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