Message	Date	From	Subject
2658	2009-01-30 01:56:37	Dave - WB6DHW	UHFSDR Hittite replacements
Art had problems dealing with Hittite and I found when I ordered online that I had to order at least 10, plus delivery was slow. So, I believe I have found replacements for the 3 Hittite parts that are on the UHFSDR board. Both parts are available from DigiKey. The HMC544 can be replaced by the TriQuint CSH210R. It will only handle a max of 26dBm vs 39 dBm for the HMC544. However, the board only puts out 20 dBm. The footprint is a SC70-6, which is a little smaller than the SOT26 the HMC544 uses. It is only a minor change to the board to allow use of either. The HMC482 can be replaced by the Freescale MMG3H21NT1, also available from DigiKey. It has a little lower max output(19.5 dBm vs 22 dBm). The footprint is identical, so no change required to the board. Dave - WB6DHW <http://wb6dhw.com>

Art had problems dealing with Hittite and I found when I ordered
online that I had to order at least 10, plus delivery was slow. So, I
believe I have found replacements for the 3 Hittite parts that are on
the UHFSDR board. Both parts are available from DigiKey. The HMC544
can be replaced by the TriQuint CSH210R. It will only handle a max of
26dBm vs 39 dBm for the HMC544. However, the board only puts out 20
dBm. The footprint is a SC70-6, which is a little smaller than the
SOT26 the HMC544 uses. It is only a minor change to the board to allow
use of either. The HMC482 can be replaced by the Freescale MMG3H21NT1,
also available from DigiKey. It has a little lower max output(19.5 dBm
vs 22 dBm). The footprint is identical, so no change required to the
board.

Dave - WB6DHW
<http://wb6dhw.com>