ULN2003A DATASHEET PDF
The ULNA, ULNA and ULNA are high voltage, high current Darlington arrays each containing seven open collector common emitter pairs. An IMPORTANT NOTICE at the end of this data sheet addresses availability, Product Folder Links: ULNA ULNA ULNAI. DESCRIPTION. The ULNA, ULNA, ULN and. ULNA are high voltage, high current darlington arrays each containing seven open collector.
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ULN, ULN ULN, ULN Seven Darlington arrays. Datasheet - production data. Features. • Seven Darlingtons per package. The ULNA is an array of seven NPN Darlington transistors capable of mA, 50 V output. It features common-cathode flyback diodes for switching. ULN,04APG/AFWG. 1. TOSHIBA Bipolar Digital Integrated Circuit Silicon Monolithic. ULNAPG,ULNAFWG. ULNAPG.
In short the pins can be divided into four different categories i. These pins along with their positions are shown below.
Internal Circuit Diagram Internal circuit diagram of ULN having different resistors and diodes is shown in the figure below. The logic diagram for ULN is shown in the figure below. A few of which are given below.
High output voltage of around 50V. Relay driver applications.
Output clamp diodes. The ground pin, as usual is grounded and the usage of Common pin is optional.
It might be surprising to note that this IC does not have any Vcc power pin; this is because the power required for the transistors to work will be drawn from the input pin itself. In the circuit consider the LED to be the loads and the logic pins blue colour as the pins connected to the Digital circuit or Microcontroller like Arduino. Notice that the Positive pin of the LED is connected to the positive load voltage and the negative pin is connected to the output pin of the IC.
This is because when the input pin of the IC gets high the respective output pin will get connected to ground. So when the negative terminal of the LED is grounded it completes the circuit and thus glows.
The loads connected to the output pin can be maximum of 50C and mA each. However you can run higher current loads buy combining two or more output pins to gather.
The drivers can be paralleled for even higher current output. Even further, stacking one chip on top of another, both electrically and physically, has been done.
Generally it can also be used for interfacing with a stepper motor , where the motor requires high ratings which cannot be provided by other interfacing devices. Typical usage of the ULNA is in driver circuits for relays , lamp and LED displays , stepper motors, logic buffers and line drivers.
From Wikipedia, the free encyclopedia. Retrieved from " https: Integrated circuits.Typical usage of the ULNA is in driver circuits for relays , lamp and LED displays , stepper motors, logic buffers and line drivers. High Voltage, High Current.
Wikimedia Commons has media related to ULN The resultant current gain is the product of those of the two component transistors:. It can be used a test switch, meaning when this pin is grounded all the output pins will be grounded.
The ULN is known for its high-current, high-voltage capacity.
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