UDQ2544B

The UDQ2544B has the following features including 1.8 A Continuous Output Current;Output Voltage to 50 V;Inputs Configured for Unipolar Stepper Motors;Active-Low Output Enable;TTL and 5 V CMOS Compatible Inputs;Integral Transient-Suppression Diodes.

Combining logic gates and high-current bipolar outputs, the UD02544B quad Darlington power driver provides an interface between low-level logic circuitry and high-power loads. Each of the four outputs can sink up to 1.8 A in the ON state with peak inrush currents to 2.5 A. The four power outputs are each comprised of an open-collector Darlington driver and an internal flyback/clamp diode for switching inductive loads. They feature a minimum breakdown and sustaining voltage of 50 V. The logic inputs are compatible with TTL and 5 V CMOS logic systems.This device is particularly well-suited for unipolar stepper motor drive applications. With complementary control inputs and an active-low ENABLE, the UD02544B 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.Representative electrical characteristics (at an ambient temperature of +25) for the commercial type UDN2544B are shown in Section 3. Complete, detailed technical information on the UDQ2544B is available on request.The UDQ2544B is supplied in a 16-pin batwing power DIP. The batwing construction provides for maximum package power dissipation in a standard DIP construction. At 250C, and with only 1 sq. in. of copper foil at the ground tabs, the package is capable of safely dissipating 3.8 W.

The information given herein, including the specifications and dimensions, is subject to change without prior notice to improve product characteristics. Before ordering, purchasers are advised to contact the Sensitron Semiconductor sales department for the latest version of the datasheet(s).In cases where extremely high reliability is required (such as use in nuclear power control, aerospace and aviation, traffic equipment,medical equipment, and safety equipment), safety should be ensured by using semiconductor devices that feature assured safety or by means of users' fail-safe precautions or other arrangement.

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