The DS275 will probably work in this case but keep in mind that it is greatly limited compared with the MAX23x. There is another part -- forget the number right now -- like the MAX232 but with internal caps. Easier to use but more expensive. Personally I use MAX232s a lot, easy to hook up, cheap and reliable. Never had a problem with them.

The DS275 has issues with a full duplex signal but this is rarely needed with GPS. However, setting up this unit by downloading new firmware could be a problem though.

The GPS receiver has provision for a battery backup which will keep it's clock running and help speed locking on power up. Not as good as keeping the 'engine running' but should lead to sub-minute locking all the same.

Cheers,

Rex.