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WL1831MOD: Operating temperature range vs WL1837MOD

Part Number: WL1831MOD
Other Parts Discussed in Thread: WL1837MOD

Hello,

I have the WL1837MOD in a new design but we have decided that we will only use a single antenna and are therefore interested in using the WL1831MOD. The datasheet indicates that the WL1831MOD is only rated for operation from -20C to 70C (unlike the WL1837MOD which is rated from -40C to 85C). Is this correct or am I misunderstanding something?

Thanks - Jason