The Overview of ULN2804A [FAQ]

The following figure shows the pinout of ULN2804A:

ULN2804A Pinout

ULN2804A Symbol

ULN2804A Footprint

ULN2804A 3D Model

The  ULN2804A  contains eight Darlington transistors with common emitters and integral suppression diodes for inductive loads. Each Darlington features a peak load current rating of 600 mA (500 mA continuous) and can withstand at least 50 V in the OFF state. Outputs may be paralleled for higher current capability.

It is supplied in an 18-lead plastic DIP with a copper lead form and features the convenient input-opposite-output pinout to simplify the board layout.

 Eight Darlington transistors with common emitters 

 Output current to 500 mA 

 Output voltage to 50 V 

 Integral suppression diodes 

 Versions for all popular logic families

 Output can be paralleled  Inputs pinned opposite outputs to simplify board layout

The schematic for ULN2804A is given below:

ULN2804A Schematic

ULN2804A Test Circuit-Output leakage current

ULN2804A Test Circuit-Output leakage current

STMicroelectronics ULN2804A technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics ULN2804A.

ULN2804A Package

Note: More details can be seen in the datasheet of ULN2804A below.

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