Kaho Electronics was founded on crystal vendors' demands for stable supply chain of Oscillator IC.  We place a high priority on technical support together with the stable supply.

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Several sister products have been released for the KH9155 series. KH9155 has the industry-leading chip size with 0.5 x 0.52 mm for SPXO ICs (as of October 2020, Kaho research).
It is provided with 130 um thick. That is super-thin. See here for details about KH9155 series.