Fairchild Packaging - Top Mark Search

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Top Mark Definition

Top mark refers to the device identification mark found on Fairchild semiconductor packages
Top mark is used for determining whether a product is genuine and whether it matches your order
Certain top marks refer to manufacturing date and assembly plant, and their values are dynamic
This search tool uses symbols, e.g. &Y, to stand for dynamic top marks
In search results, static marks are displayed in plain text, while dynamic marks are displayed in bold font with short descriptive text in parenthesis as link to help webpage
Please check symbol list below for more details on dynamic top marks

Top Mark Record Example:
(Please click on the text link beside each symbol for details)

	Line 1:		&Y(Binary Year)

	Line 2:		&O(Plant Code)1234&C(Die Run)

	Line 3:		&.(Pin One)&O(Plant Code)&E(Space)&V(Binary Week)

SMA/SMB/SMC Products

	Line 1:		$Y(Logo) &Z(Assembly Plant) &3(Date Code)

	Line 2:		SMD

Top Mark Convention Symbol List
(please click on each symbol to see more details)

Symbol	Format	Description
$Y	FS or	Fairchild Semiconductor (FSC) logo graphic
&Z	Z	Designates the Assembly plant code
&4	XXYY	4-Digit Date code format
&3	XYY	3-Digit Date code format
&2	XY	2-Digit Date code format
&G	YY	Weekly Date code format
&T	TT	Die Run Traceability Code
&W	----	Six-Week Binary Datecoding Scheme
&V	---	Eight-Week Binary Datecoding Scheme
&Y	----	Binary Calendar Year Coding Scheme
&C	T	Single digit Die Run Code (last digit of the two digit code)
&U	U	Wafer Fab Code
&E		Designates Space
&.	.	Pin one dot (For SC70, SOT23, MLP binary marking type and WLCSP)
&H	Lot Number	Last 3 digit of workstream lot number
&O		Plant Code identifier on Tiny Logic Package
&K	KK	2-Digits Lot Run Traceability Code


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