QSOP - Quarter Size Outline Package

                

The Quarter Size Outline Package, or QSOP, is a small rectangular surface-mount plastic package with gull wing leads protruding out of its longer sides.

  

The QSOP comes in two standard body widths: the narrow body QSOP which has a nominal body thickness of 150 mils and the wide body QSOP which has a nominal body thickness of 300 mils. Typical QSOP lead counts range from 16 to 28 leads for the narrow body and 36 to 44 leads for the wide body.  The QSOP lead pitch is typically 25 mils.

   

Table 1. Properties of Some Examples of QSOP's

Part Number

No. of Pins

Body Size

Body Thickness

Lead Pitch

QSOP-16

16

150 mils x 192 mils

55 mils

25 mils

QSOP-20

20

150 mils x 340 mils

55 mils

25 mils

QSOP-24

24

150 mils x 340 mils

55 mils

25 mils

QSOP-28

28

150 mils x 390 mils

55 mils

25 mils

 

   

Figure 1.  Examples of the QSOP (not in scale)

      

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