R
Rick
I am looking at doing a very low cost very small (about 25 units) run of a
design in which I would like to use an atmel arm7 microcontroller, like the
AT91R40008 which includes 256kbytes of 32 bit wide sram in chip (very nice).
This chip comes in a TQFP 100 package which is a piece of cake for me to solder
(I have hand soldered several 208 pin Spartan II devices with 100% success).
On the other hand, the exact same chip is available for $2 more that includes
2Mbytes of 16 bit wide 90ns flash on chip in a 0.8mm 121 ball BGA package. That
2 Meg, which IS needed would cost me at least $20 if I have to use an external
chip, not to mention board space.
I have googled and perused old s.e.d. threads, but I have not really developed a
warm fuzzy feeling that small runs of a 0.8 pitch BGA device can be done with a
high success rate using common cheap technology (hot air guns, toaster ovens,
hot plates, etc.).
How many of you have soldered something like this with simple devices, and what
was your success rate?
Thanks,
Rick
design in which I would like to use an atmel arm7 microcontroller, like the
AT91R40008 which includes 256kbytes of 32 bit wide sram in chip (very nice).
This chip comes in a TQFP 100 package which is a piece of cake for me to solder
(I have hand soldered several 208 pin Spartan II devices with 100% success).
On the other hand, the exact same chip is available for $2 more that includes
2Mbytes of 16 bit wide 90ns flash on chip in a 0.8mm 121 ball BGA package. That
2 Meg, which IS needed would cost me at least $20 if I have to use an external
chip, not to mention board space.
I have googled and perused old s.e.d. threads, but I have not really developed a
warm fuzzy feeling that small runs of a 0.8 pitch BGA device can be done with a
high success rate using common cheap technology (hot air guns, toaster ovens,
hot plates, etc.).
How many of you have soldered something like this with simple devices, and what
was your success rate?
Thanks,
Rick