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HMC129 part compatibility 1997rev and a 2007 rev part


I have some Hittite dies from 1997 HMC129. the fets on the die appear to a lot smaller than the 2007 die parts.

they are both HMC129 parts. I can not find data on the 1997 part. are they interchangeable?

1997 device

2007 device