In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Coriolis wrote:

Min spacing for sparkfun is 8 mil, this is 0.2032 mm. The pin spacing for the SX52 is 0.65mm, this means the PQFP footprint can be used in submissions to sparkfun, it is the SX48 with it's 0.50mm spacing that cannot be used with sparkfun's fab service. Use 0.4mm wide pads spaced 0.65mm apart and this will conform to sparkfun's min spacing requirements.

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