Hi, our cust asks what does the "F" stand for in CD4011BF?
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CD4XXXX devices follow our High Reliability part numbering system. The F in CD4011BF is the package designation for Ceramic Dual In-Line Package (CDIP). Here is a link to our High Rel numbering system document for further reference: https://www.ti.com/lit/an/sboa142a/sboa142a.pdf?ts=1627053191584