E-ULN2004A

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Transistor Type:	7 NPN Darlington
Current - Collector (Ic) (Max):	500mA
Voltage - Collector Emitter Breakdown (Max):	50V
Vce Saturation (Max) @ Ib, Ic:	1.6V @ 500µA, 350mA
Current - Collector Cutoff (Max):	--
DC Current Gain (hFE) (Min) @ Ic, Vce:	1000 @ 350mA, 2V
Power - Max:	--
Frequency - Transition:	--
Operating Temperature:	150°C (TJ)
Mounting Type:	Through Hole
Package / Case:	16-DIP (0.300", 7.62mm)
Supplier Device Package:	16-DIP
Base Part Number:	ULN2004A

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The E-ULN2004A is an application field and working principle of a set of open-collector array of bipolar junction transistors. It is suitable for general-purpose switching and driving applications, such as relays, motor controls, and input/output interfacing. This device works by allowing current to flow through an external load, while providing noise suppression and protection against the flyback voltage of motors and inductive loads.The E-ULN2004A contains eight NPN transistors, each with a Darlington pairs including high-voltage and high-current gains. Darlington pairs are two transistors connected together to produce one transistor with a higher current-gain. In the E-ULN2004A, the two transistors are internally connected together in series, providing a high voltage-gain and high current-gain combination. This combination makes the device suitable for use in many applications such as motor controls, relays, and input/output interfacing.The E-ULN2004A has an efficient resistance scale, which reduces heat dissipation and prolongs the life of the device. The device also includes a Darlington pair along with an integrated clamping circuit which helps to regulate the internal voltage, preventing damage from over-voltage.When the E-ULN2004A is used for general-purpose switching and driving applications, it is important to understand that the device is designed to operate at a specified collector current. If this current is exceeded, the device can become damaged or destroyed. Therefore, it is important to ensure the device is operated within its specified current range.When used for motor control applications, the E-ULN2004A can provide the necessary current for the motor to turn. The current for the motor is monitored and regulated by the integrated clamping circuit, which helps to prevent damage from over-current. The E-ULN2004A is also suitable for use in input/output interfacing applications. It allows devices such as keyboards, mice, and printers to be connected to a computer without the need for additional hardware. The E-ULN2004A circuit also provides additional protection against any noise that may be present in the environment, ensuring the signals are not affected by external interference.The E-ULN2004A is a reliable, cost-effective solution for many general-purpose switching and driving applications. It provides excellent noise suppression, provides additional protection against over-voltages and over-currents, and helps to regulate the internal voltage. With its efficient resistance scale and cost-effective design, the E-ULN2004A is an ideal choice for many applications.

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