25C640 Microchip Technology, Inc., 25C640 Datasheet - Page 14

• Manufacturer Part Number: 25C640
• Description: The 25AA640 is a 64K-bit Serial Electrically Erasable Prom With Memory Accessed Via a Simple Serial Peripheral Interface (SPI™) Compatible Serial Bus
• Manufacturer: Microchip Technology, Inc.

25AA640/25LC640
4.0
4.1
DS21223E-page 14
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PACKAGING INFORMATION
Package Marking Information
Standard marking consists of Microchip part number, year code, week code, traceability code (facility
code, mask rev#, and assembly code). For marking beyond this, certain price adders apply. Please
check with your Microchip Sales Office.
8-Lead PDIP (300 mil)
8-Lead SOIC (150 mil)
8-Lead TSSOP
Legend:
Note:
XXXXXXXX
XXXXYYWW
XXXXXXXX
XXXXXNNN
YYWW
In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line thus limiting the number of available characters
for customer specific information.
NNN
YY
WW
NNN
XX...X Customer specific information*
XXXX
YYWW
NNN
Week code (week of January 1 is week ‘01’)
Alphanumeric traceability code
Year code (last 2 digits of calendar year)
Example:
Example:
Example:
I/SNYYWW
25LC640
25LC640
/PNNN
YYWW
NNN
2001 Microchip Technology Inc.
5LCX
IYWW
NNN