ULN2074B

Series:	--
Packaging:	Tube
Part Status:	Active
Transistor Type:	4 NPN Darlington (Quad)
Current - Collector (Ic) (Max):	1.75A
Voltage - Collector Emitter Breakdown (Max):	50V
Vce Saturation (Max) @ Ib, Ic:	1.4V @ 2mA, 1.25A
Current - Collector Cutoff (Max):	--
DC Current Gain (hFE) (Min) @ Ic, Vce:	--
Power - Max:	1W
Frequency - Transition:	--
Operating Temperature:	-20°C ~ 85°C (TA)
Mounting Type:	Through Hole
Package / Case:	16-PowerDIP (0.300", 7.62mm)
Supplier Device Package:	16-PowerDIP (20x7.10)

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ULN2074B Application Field and Working Principle

The ULN2074B is part of the family of Transistors - Bipolar (BJT) - Arrays, which is recognized for its ability to provide high current and voltage isolation in a single package. This device consists of a dielectrically-isolated array of 7 NPN Darlington pairs that are designed to interface between logic circuits and low voltage, high current, inductive loads.The ULN2074B can be used in a variety of applications such as relay and solenoid drivers, printer motors, lamp drivers and DC motor control. Its built-in protection features, including an on-chip zener diode, make it an excellent choice for use in harsh industrial environments. In addition, its wide operating temperature range (from -40⁰C to +85⁰C) makes it perfect for many commercial applications as well.The ULN2074B works by taking the small logic level input voltage, typically 5V or 3.3V and using the NPN Darlington pair array to amplify the current and produce a higher voltage and current output to switch on external, load elements. In order to limit the output current to a preset value, the ULN2074B also provides a constant-current limiting feature on all outputs.The ULN2074B provides many benefits over discrete solutions, including improved thermal performance, cost savings, improved packaging density, shorter leadtime and simplified design and assembly. In addition, its input-output isolation exceeding 2500VRMS makes it the perfect solution for applications requiring high reliability and isolation.To summarize, the ULN2074B is a versatile, cost-effective solution for applications requiring high current and voltage isolation in a single package. Its built-in protection features, high current-carrying capability and wide operating temperature range make it an ideal solution for many commercial and industrial applications. This device can be used in a wide range of applications such as relay and solenoid drivers, printer motors, lamp drivers and DC motor control.

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