How is the Si4133-D-GT RF Synthesizer marked on the top of the package?
A popular RF Synthesizer is the Si4133 in the 24-pin TSSOP package. The orderable P/N is the Si4133-D-GT. However, the “D” representing Revision D is not in the first line of the top part marking. There are also a number of other symbols and abbreviations which this RF Synthesizer Knowledge Base article will explain.
Looking at the image attached to this article, Example_Si4133-D-GT_top_marking.png, there are 3 lines of text and/or symbols as follows:
(1) The first line reads “Si4133-GT”which signifies the24-pin TSSOP version Si4133.
(2) The second line is the assembly trace code and reads, in this example, “1021DCF0MT”.
· The first 4 numbers represent the date code in YYWW format where YY = year, WW = work week
In this example, the device is dated 2010, work week 21.
· The 1st character after the date code, e.g. “D”, represents the device revision.
· The 2nd character after the date code, e.g. “C”, represents the fabrication site.
· The 3rd character after the date code, e.g. “F”, represents the assembly site.
· The 4th character after the date code is optional and reserved for internal use.
· The final 5th and 6th characters after the date code are for serialization.
(3) The third line contains an oval with an “e3” followed by the abbreviation “MY”.
· The “e3” in an oval is the JEDEC marking used to designate the category of Pb-Free terminal finish used on the device. In this case, “e3” = Sn or Matte Tin.
· The “MY” refers to the country of origin which in this case is Malaysia.