Replacing FPGAs with Low Cost ASICs

FPGAs Spartan 3E


FPGA Conversion Break-Even

We define a FPGA conversion break-even point as being the number of devices you need so that your savings equals the ASIC NRE investment.  Mathematically, this becomes:

Break-Even Volume =                     NRE Charge                      
                                          (FPGA Unit Price – ASIC Unit Price)   


FPGAs Spartan 3E List

The following table list Spartan 3E FPGAs, and the estimated breakeven volume for each part.  In general, if your volumes exceed the breakeven volume in 6 to 9 months, then an Spartan 3E FPGA conversion into an ASIC makes economic sense for you.


Part Number Breakeven Volume
XC3S100E-4TQ144C 10000
XC3S100E-4TQ144I 6800
XC3S100E-4VQG100I 7300
XC3S100E-5TQ144C 8100
XC3S100E-5TQG144C 6800
XC3S100E-5VQ100C 8700
XC3S100E-5VQG100C 7300
XC3S250E-4FT256C 5000
XC3S250E-4FT256I 2900
XC3S250E-4FTG256I 2900
XC3S250E-4PQ208I 3400
XC3S250E-4TQ144I 4200
XC3S250E-4TQG144C 5000
XC3S250E-4VQ100C 6400
XC3S250E-4VQG100C 5500
XC3S250E-5FT256C 3400
XC3S250E-5TQ144C 4700
XC3S250E-5TQG144C 4200
XC3S250E-5VQ100C 5200
XC3S250E-5VQG100C 4500
XC3S500E-4FT256C 2700
XC3S500E-4FT256I 1900
XC3S500E-4FTG256C 2300
XC3S500E-4PQ208C 3100
XC3S500E-4PQ208I 2200
XC3S500E-4PQG208C 2700
XC3S500E-4VQG100I 2500
XC3S500E-5FT256C 2200
XC3S500E-5PQG208C 2200
XC3S500E-5PQG208C 2200
XC3S1200E-4FTG256C 1500
XC3S1200E-4FTG256C 1500
XC3S1200E-5FT256C 1400


If your Spartan 3E FPGA is not listed here, or if you want more information, Give us a call at 512-342-9871, e-mail us at This email address is being protected from spambots. You need JavaScript enabled to view it., or just push the Request a Quote button. We will help you cut your manufacturing costs.