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SN74LVC1G3157: Difference between SN74LVC1G3157DCK3 vs SN74LVC1G3157DCKR

Part Number: SN74LVC1G3157

Hi Team,

What is the difference between SN74LVC1G3157DCK3 vs SN74LVC1G3157DCKR

Currently, my customer is using SN74LVC1G3157DCKR and we are looking for alternates due to supply constraints. 

  • Different lead frame plating (Tin and Bismuth), and non-"green" flame retardants (Antimony trioxide, Bromine). There are no electrical differences.

  • Hi Omar,

    This difference in these devices is that the "3" version has SNBI lead finishing (versus NIPDAU) and it is not "green" which TI defines as below:

    "TI defines "Green" to mean “Pb-Free” and free of Bromine (Br) and Antimony (Sb) based flame retardants where Br or Sb do not exceed 0.1% by weight in the homogeneous material."

    To be clear, there is not difference in performance of the device itself, just the materials used to create the device.