A4988 is a complete microstepping motor driver with built-in translator for easy operation<br />A4988 key to the easy implementation: only need to enter a pulse in the "Step" input drives the motor one microstep.<br /><br />     A4988 surface mount QFN package (ES), a size of 5 mm × 5 mm, a nominal overall package height of 0.90 mm, and with exposed pad for enhanced thermal dissipation. The package is Pb-free (suffix -T), with 100% matte tin leadframe plating.<br /><br />Features and Benefits:<br /><br />1) Low RDS (ON) outputs<br />2) Automatic current decay mode detection / selection<br />3) is mixed with slow current decay mode<br />4) Synchronous rectification for low power dissipation<br />5) Internal UVLO<br />6) Cross-current protection<br />7) 3.3 and 5 V compatible logic supply<br />8, the thermal shutdown circuit<br />9) Ground short-circuit protection<br />10) Load short-circuit protection<br />11) five optional step modes: full, 1 / 2,1 / 4,1 / 8 and 1/16<br /><br />A4988 drive * 1<br />Static bag package<br /><img src="http://img6.eachbuyer.com/x9/p100/eb4320_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb4320_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb4320_3.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb4320_4.jpg" />