A while ago I bought some STM32F100C8 chips (64k flash, 8k sram) because they were cheaper than the F100C6 chips, 32k flash, 4 k sram. At least at the time. I was recently looking at them again, and decided to price chart the whole family of STM32F100Cxxxx, across Digiey, Mouser and Farnell (/Newark/element14 etc)
STM32F100C is the 48pin LQFP package. Results were interesting to say the least. Prices are for 100 units, so not huge scale, but more than just a couple of prototypes. Prices are in USD, and were advertised when I wrote this post.
Points of note
- Newark/farnell cheaper almost across the board. That’s unusual for us, but we may have to look at them a bit more often now :)
- DigiKey is the only one where the price actually goes up as you increase the specs. Mouser has the C6 cheaper than the C4, and Newark/Farnell has the CB cheaper than the C8
| Part | flash | ram | DigiKey | Mouser | Newark/Farnell |
|---|---|---|---|---|---|
| STM32F100C4 | 16KB | 4KB | 1.98 | 2.11 | 1.64 |
| STM32F100C6 | 32KB | 4KB | 2.091 | 1.99 | 1.91 |
| STM32F100C8 | 64KB | 8KB | 2.8085 | 2.93 | 2.89 |
| STM32F100CB | 128KB | 8KB | 3.239 | 3.09 | 2.87 |