How to control HMC253/HMC252 RF switch chip

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troffasky
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How to control HMC253/HMC252 RF switch chip

Post by troffasky »

Quite a few of these around, I assume they're based on the reference design:

https://www.aliexpress.com/item/1005001474641210.html

Use for this is switching between RX antennas in the loft, remotely. I have a Pi with a couple of SDRs connected, so I reckon I could drive it with that...probably?
Can't find much discussion of how these perform or how to use them.
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Otter
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Re: How to control HMC253/HMC252 RF switch chip

Post by Otter »

Well, a quick look at the datasheet and how to drive them seems to be fairly obvious. Three inputs A,B,C different selections of high and low voltage select different inputs. Details in datasheet. https://www.analog.com/media/en/technic ... mc252A.pdf
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troffasky
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Re: How to control HMC253/HMC252 RF switch chip

Post by troffasky »

Well I've ordered one, let's see how it goes.
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