Traceability
The devices manufactured at STMicroelectronics with the design enhancement can be distinguished both
visually and electrically.
Visually: The devices can be distinguished visually by the STMicroelectronics traceability code located on
line 2 of the package topmark. Line 2 will be changed from a 4-digit alphanumeric code to a 5-digit
alphanumeric code. Also, a 3-digit code will be added to line 3 for additional traceability information. See the
example below.
Sample Topmark for 20-Pin TSSOP Package
XCF04S ™ V
XCF04S ™ V
B352
HP421
AAB
Figure 1: Without Design Enhancement
Figure 2: With Design Enhancement
Sample Topmark for 20-Pin TSSOP Package (Pb-Free)
XCF04S ™ VG
XCF04S ™ VG
B352
HP421
AAB
Figure 3: Without Design Enhancement
Figure 4: With Design Enhancement
Electrically: The devices can be distinguished electrically by the IDCODE:
STMicroelectronics
IDCODE without
STMicroelectronics
IDCODE with Design
Device
Design Enhancement
Enhancement
XCF01S
XCF02S
XCF04S
05044093h
05045093h
05046093h
F5044093h
F5045093h
F5046093h
Table 2: IDCODEs
The current version of the programming algorithm ignores this revision field (1st character in bold above), so
customers need not update their programming algorithms.
© 2004 Xilinx, Inc. All rights reserved. All Xilinx trademarks, registered trademarks, patents, and disclaimers are as listed at http://www.xilinx.com/legal.htm.
All other trademarks and registered trademarks are the property of their respective owners. All specifications are subject to change without notice.
PCN2004-18 (v1.0) August 9, 2004
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