Can I confirm the operating temperature for HMC661 is 0 to 85 deg, and for HMC1061 is from -40 to 85deg?
The HMC661 should have the same operating temp. as the HMC1061. The HMC661 datasheet appears to have an error. I'm checking into it and will update you soon.
Confirmed that the HMC661 datasheet is in error. The operating temperature of the HMC661 is -40C to +85C, same as the HMC1061. The datasheet will be corrected.