ULN2003A

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ULN2003A pinout

UNL2003A pinout
Internal schematic

An ULN2003A is a high-voltage, high-current Darlington transistor array.[1][2]

It consists of seven NPN Darlington pairs that feature high-voltage outputs with common-cathode flyback diodes for switching inductive loads.

It is very similar to the ULN2801A, ULN2802A, ULN2803A,[3] ULN2804A, and ULN2805A, only differing in logic input levels (TTL, CMOS, PMOS) and number of inputs (8).

The drivers can be paralleled for higher current capability, even stacking one chip on top of another, both electrically and physically has been done.

Features

  • 500 mA rated collector current (single output)
  • 50 V output
  • Includes output flyback diodes
  • Inputs compatible with various types of logic

Applications

Typical usage of the ULN2003A is to drive relays, lamp and LED displays or stepper motors.

References

  1. ↑ Texas, Instruments. "ULN2003A Datasheet". 
  2. ↑ Malaysia, TOSHIBA. "ULN2003 Datasheet". 
  3. ↑ Texas, Instruments. "ULN2803A data sheet". 
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