QLF08_LaBel.pdf - 第28页
IC and Component Selection for Space Sy stems – Presented by Kenneth A . LaBel 28 Programmatics: Development Schedule • Example of a time to market (TTM) for commercial options – Assumptions • 90nm technology , < 1Mga…
IC and Component Selection for Space Systems – Presented by Kenneth A. LaBel
27
The Trade Space Curve for Performance
• Application-specific trade-offs are often made based on the
design complexity of the application requirements.
– Note: FPGAs and SAs are moving to the right as
semiconductor processes scale to smaller transistor feature
sizes
Source: http://www.fpgajournal.com
Majority of NASA needs
IC and Component Selection for Space Systems – Presented by Kenneth A. LaBel
28
Programmatics:
Development Schedule
• Example of a time to market (TTM) for commercial options
– Assumptions
• 90nm technology, < 1Mgate device
– SA is ~1/2 TTM of a CA
– FPGAs are likely < ½ of the SA TTM
– Note: This does not consider reliability or radiation qualification
times
0 4 8 12162024283236
Std. Cell
S-ASIC
Months
Time to 1st Silicon
Respin (Risk X Time)
Time to 2nd Device
Respin 2nd Device
SA
CA
Comparing
SA vs. CA
for TTM
Source: www.chipdesignmag.com
IC and Component Selection for Space Systems – Presented by Kenneth A. LaBel
29
Programmatics:
What if the first design is incorrect?
• As digital devices pack more bits into the same physical
space (i.e., technology feature size is shrinking), more
designs require a “second pass” or re-spin.
• Even worse, the time it takes for this re-spin has increased
0
1
2
3
4
5
6
7
Months
.25u .18u .13u .09u
Technology
Average Re-Spin time
Source: www.chipdesignmag.com
0
10
20
30
40
50
60
.25u .18u .13u .09u
Technology
Percent of designs requiring re-spin