A few months ago I looked for simple PLDs like the 22V10 in a small footprint. I found nothing at that time. Everyone was still making DIPs, PLCCs and a few SOPs. But no one was using smaller pitch devices. Now logic makers are using QFN packages that are not much larger than a SOT-23!
Anyone know of a PLD that comes in QFN, TSSOP or other small packages?
Atmel do TSSOP for 16V8 and ATF22V10CQZ, and I have suggested they do QFN, but not so far. ICT also offer PEEL18CV8 in TSSOP. Larger 32MC CPLD's are mostly TQFP, or some BGA - some do TQFP48 which is getting good density. The Lattice ispGAL22V10A comes in QFN32, but is very low power only in the 1.8V model - seems their on-chip regulator is either poorly optimised, or ballasted on the 2.5V and 3.3V models.
-jg
Well, how much logic does your design require? How many pins?
Xilinx has CoolRunner CPLDs in really small chip-scale packages.
Thanks for the info. I have looked at all of these and there are some good choices. The Lattice part is not Zero power, but 7 mA standby is not bad. The QFN makes a difference is space. The TSSOPs may be small, but the QFN is half the size.
TQFP small enough for you?
Thanks for the info. But no, the TQFP is still a bit larger than I would like. I am looking for something along the lines of a QFN. Another poster showed me that Lattice has a 22V10 in a QFN, but it is not zero power although it is not the typical high power either. We'll see if I can fit this one into the design.
Their 1.8V model specs 150uA, whilst 2.5/3.3V ones are ~7mA, hence my comment above.
True. QFN is an obvious package for SPLD/CPLD (better than BGA), but the vendors move slowly...
-jg
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