Top Mark Convention - 4-Digit Date Code

Contents
Summary | Calendar Year Scheme | Six-week Scheme | Two-week Scheme | Weekly Scheme

Summary

SymbolFormatDescriptionApplicable Packages
&4XXYY4-digit date code
XX stands for calendar year
YY stands for workweek
SOIC 14L
DMOS SPAK
SSOT-227/ISOTOP (DPP)
MDIP 14, 16, 20, 24

Table 1: Numeric Calendar Year Coding Scheme

Calendar YearNon-Lead Free ProductsLead Free Products
200000YYAYY
200101YYBYY
200202YYCYY
200303YYDYY
200404YYEYY
200505YYFYY
200606YYGYY
200707YYHYY
200808YYJYY
200909YYKYY
201010YYAYY
201111YYBYY
201212YYCYY
201313YYDYY
201414YYEYY
201515YYFYY
201616YYGYY
201717YYHYY
201818YYJYY
201919YYKYY
Note: The marking of the calendar year will repeat after the cycle of ten (10) years.
YY stands for workweek code.

Table 2: Six weeks numeric date code scheme
Date Code Type is "S6" for this scheme.

Workweek No.Value
Workweek 06-11XX06
Workweek 12-17XX12
Workweek 18-23XX18
Workweek 24-29XX24
Workweek 30-35XX30
Workweek 36-41XX36
Workweek 42-47XX42
Workweek 48-51XX48
Workweek 52-05XX52

Table 3: Two weeks numeric date code scheme
Date Code Type is "S2" for this scheme.

Work Week No.Value
Workweek 1,2XX01
Workweek 3,4XX03
Workweek 5,6XX05
(continues for the rest of the workweeks)
Workweek 49,50XX49
Workweek 51,52XX51
Workweek 53XX53

Table 4: Weekly numeric date code scheme
Date Code Type is "S1" for this scheme.

Work Week No.Value
Workweek 01XX01
Workweek 02XX02
Workweek 03XX03
(continues for the rest of the workweeks)
Workweek 51XX51
Workweek 52XX52
Workweek 53XX53

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