UDN2544B Datasheet | Allegro MicroSystems

feature a minimum breakdown and sustaining voltage of 50 V. The logic inputs are patible with TTL and 5 V CMOS logic systems. This device is particularly well-suited for unipolar stepper motor drive applications. With plementary control inputs and an activelow ENABLE, the UDN2544B makes it easy to implement full stepping of a stepper motor with only two microcontroller/microprocessor control lines. Other typical applications include relay or solenoid driving and incandescent or LED lamp driving. The UDN2544B is supplied in a 16-pin batwing power DIP. The batwing construction provides for maximum package power dissipation in a standard DIP construction. At 25°C, and with only 1 sq. in. of copper foil at the ground tabs, the package is capable of safely dissipating 3.8 W. FEATURES I 1.8 A Continuous Output Current I Output Voltage to 50 V I Inputs Configured for Unipolar Stepper Motors I Active-Low Output Enable I TTL and 5 V CMOS patible Inputs I Integral Transient-Suppression Diodes Always order by plete part number: UDN2544B . 2544 QUAD DARLINGTON POWER DRIVER ELECTRICAL CHARACTERISTICS at TA = +25°C, TJ ≤ 150°C, VCC = 4.75 V to 5.25 V. Characteristic Output Leakage Current Output Sustaining Voltage Output Saturation Voltage Symbol ICEX VCE(sus) VCE(SAT) Input Voltage Input Current Total Supply Current Logic 1 Logic 0 Logic 1 Logic 0 ICC Clamp Diode Forward Voltage Clamp Diode Leakage Current Test Conditions VOUT = 50 V IOUT = 1.8 A, L = 3.0 m H IOUT = 600 m A IOUT = 1.0 A IOUT = 1.8 A VIN(1) or VEN(1) VIN(0) or VEN(0) VIN(1) or VEN(1) = 2.4 V VIN(0) or VEN(0) = 0.8 V All Outputs ON, Outputs Open All Outputs OFF IF = 1.0 A IF = 1.8 A VR = 50 V Min. - 50 - - - 2.4 - - - - - - - - Limits Typ. Max. <1.0 100 - -...