Features: SpecificationsDescriptionThe UDN-2540B has the following features including 1.5 A Output Current;Output Voltage to 60 V;Integral Transient-Suppression Diodes;Efficient Input/Output Pin Structure;TTL, CMOS, PMOS, NMOS Compatible.
Combining NAND logic gates and high-current bipolar outputs, the UDN-2540B power and relay driver provides interface between low-level signal-processing circuits and power loads to 350 W. Each of the four independent outputs of this device can sink up to 1.5 A in the oN state. In the oFF state the drivers will withstand at least 60 V. Transient-suppression clamp diodes and a minimum 35 V out-put sustaining voltage allow their use with many inductive loads.Typical applications include relays, solenoids,and do stepping motors. It can also be used to drive high-current incandescent lamps, LEDs, and heaters. In display applications, the diodes can be used to perform the "lamp test" function.Inputs are compatible with most TTL, DTL,LSTTL, and 5 V or 12 V CMOS and PMOS logic.Each of the four outputs is recommended for continuous load currents to 1.25 A. Outputs can be paralleled for higher load currents.The UDN-2540B is supplied in a 16-pin dual-in-line package with heat-sink contact tabs. This configuration allows attachment of an inexpensive heat sink and fits a standard integrated circuit socket or printed wiring board layout.
Typical applications for this device include driving incandescent lamps and do stepper motors.Lamps with steady-state current ratings up to 150 mA can be driven without current limiting or warming resistors (assumes I .5 A peak in-rush). The internal diodes can be used to perform the "lamp test"function as shown. Bifilar (unipola})stepper motors can be driven directly. The internal transient-suppression diodes prevent damage to the output transistor from positive high-voltage inductive spikes as the output switches oFF.
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UDN-2540B Data Sheet
